Abstract:
In order to achieve improved work efficiency and reduced work errors, this information processing device is provided with an acquisition unit, a detection unit, and a report control unit. The acquisition unit acquires information used in work to be executed on a work object from a document attached to the work object. The detection unit detects the whereabouts of the work object. On the basis of a rule that is data in which the information used in the work and work contents utilizing the information are associated with each other, the report control unit detects the work contents for the work object. Further, the report control unit reports the work contents by controlling a report device for reporting the work contents.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a technique capable of improving the efficiency of shipping operations in distribution businesses, manufacturers and the like, and sorting operations in retail businesses and the like. 
       BACKGROUND ART 
       [0002]    A plurality of dimensions, kinds or destinations (addresses) of parcels or items handled in physical distribution warehouses of distributors, manufacturers, stores, online retail stores and the like are various. An operation (hereinafter referred to as a sorting operation) of sorting parcels and items according to a delivery destination or the kind of packages is performed in the following order. For example, first, an operator reads a destination label of a parcel or an item (hereinafter referred to as a sorting object) placed on a working table. Subsequently, the operator moves sorting objects to a storage rack, a roll box pallet, or the like according to a delivery destination or the kind of packages based on information described in the destination label. 
         [0003]    In a general sorting operation, since sorting objects are sequentially supplied to the working table by a machine such as a belt conveyor or a sorter, a sorting object is always present on the working table. Moreover, since the operator can freely move the sorting object on the working table with his or her hands, it is possible to save the labor of the sorting operation according to a plan of the operator. For example, the operator sorts sorting objects collectively. The operator moves and turns to such a position and in such a direction that the operator can easily carry the sorting object and then lifts the sorting object. The operator moves sorting objects on the working table collectively to a position near a sorting destination and then lifts the sorting objects. With such an operation, the operator can save the labor of the sorting operation. Further, in the sorting operation, for example, in case that a plurality of operators determines a sorting destination (a storage rack, a roll box pallet, or the like) to which each operator is allocated and moves the sorted sorting objects to the allocated sorting destination, it is possible to decrease the walking distance of each operator. Moreover, in case that a plurality of operators performs the sorting operation and an operator who is not busy assists other operators, it is possible to improve the efficiency of the sorting operation. That is, the sorting operation period is different depending on an operator or a sorting object. Even when an operator is behind with operations, another operator who is not busy assists the operator. In this way, it is possible to perform the sorting operation efficiently as a whole. 
         [0004]    The sorting operation can be automated using machines such as a belt conveyor having a sorter function or a pickup robot in case that types and destinations of sorting objects are limited as in libraries or shipping sites of producers who manufacture a small variety of products. However, since the apparatus that automates the sorting operation is expensive, has low versatility, and requires large facility, distributors and retailers who can introduce such the apparatus are limited. Thus, most sorting operations are performed by manpower without using such the apparatus. 
         [0005]    PTL 1 discloses a technique related to the sorting operation. In the technique of PTL 1, information on a sorting destination read by a business terminal such as a hand scanner from a radio frequency identifier (RFID), a barcode, or a two-dimensional code provided on a sorting object is notified to an operator. According to this technique, since the sorting destination which is the minimum information necessary in a sorting place is notified to the operator, the operator can perform the sorting operation without the need to understand or recognize the sorting destination. 
         [0006]    PTL 2 discloses a technique of displaying destinations of individual sorting objects placed on a belt conveyor on a display device. According to this technique, since the visibility of the sorting object is improved, it is possible to decrease sorting errors and to improve the accuracy of the sorting operation. 
         [0007]    PTL 3 discloses a technique related to an automated warehouse in which loading, storage, and unloading of items and parcels into and from a warehouse are controlled by a combination of a plurality of robots and conveyors. According to this technique, it is possible to improve the loading and unloading efficiency in a warehouse. 
         [0008]    Moreover, PTL 4 discloses a technique of reading the content of a slip attached to an upper surface of a parcel regardless of the size of the parcel without increasing the scale of facility in a delivery center or the like in which various parcels of different sizes are handled. Further, PTL 5 discloses a technique of easily extracting an intended article from articles being conveyed by a belt conveyor. 
       CITATION LIST 
     Patent Literature 
       [0000]    
       
         [PTL 1] JP 3867970 B2 
         [PTL 2] JP 2011-102170 A 
         [PTL 3] JP 3484104 B2 
         [PTL 4] JP 2006-155395 A 
         [PTL 5] JP 2008-280102 A 
       
     
       SUMMARY OF INVENTION 
     Technical Problem 
       [0014]    However, in case that the technique disclosed in PTL 1 is used, an operator has to hold the sorting object and the business terminal in a switched manner and look at the sorting object and the display alternately. Thus, the sorting operation which uses the technique disclosed in PTL 1 is not efficient. Moreover, in the technique of PTL 1, the display of the scanner or an auxiliary display for displaying the sorting destination is disposed at a position away from the sorting object. In this case, since the sorting object being sorted by the operator may be different from the sorting object relating to the information of the sorting destination displayed on the display, the operator may recognize the sorting destination wrongly. 
         [0015]    In case that the technique disclosed in PTL 2 is used, it is necessary to adjust the speed of the belt conveyor according to an operation period of the operator. That is, the speed of the belt conveyor and the overall operation speed are determined by an operation which takes the largest period. Thus, even when the operator completes the operation faster than the speed, the operator has to wait for the next sorting object without moving onto the next operation. Moreover, in case that a plurality of operators performs operations simultaneously, since the operation speed is different from operator to operator, the overall speed needs to be set to an operator whose operation speed is the lowest. Thus, an overall efficiency of the operation which uses a belt conveyor may not be satisfactory. 
         [0016]    In case that the technique disclosed in PTL 3 is used, and there are a number of different types of sorting objects, the apparatus for holding sorting objects may be complex and expensive. Moreover, when there are a large number of sorting destinations, the conveying device may have a large size and be complex. Further, in the configuration disclosed in PTL 4, a camera captures a parcel appearing on a reflection mirror. Thus, in order for the camera to capture the slip of the parcel in a focused state, the operator or the like may have to adjust the position and the inclination of the reflection mirror. However, the operation of adjusting the position and the inclination of the reflection mirror takes a considerable amount of time and is a little troublesome. Moreover, there is a possibility that the position and the inclination are not adjusted appropriately. If the position and the inclination of the reflection mirror are not adjusted appropriately, a problem that the camera cannot capture the slip of the parcel or a problem that the captured image of the slip of the parcel, obtained by the camera blurs may occur. If such a problem occurs, for example, it may become a hindrance to the sorting operation which uses the image captured by the camera and the sorting operation cannot be performed accurately. Further, in the technique disclosed in PTL 5, articles (for example, products) conveyed by the belt conveyor are projected to a monitor. Moreover, when a defective product is present in these articles, the image of the defective product (that is, an extraction target) is marked, for example, by an emphasized color in the image on the monitor. The operator picks the defective product out of the belt conveyor based on the image on the monitor. However, since the operator has to pick out the defective product while viewing and comparing the article on the belt conveyor and the monitor image, the operation efficiency is not satisfactory and there is a possibility that the operator picks out an article which is not a defective product. 
         [0017]    The present invention has been devised to solve the above-described problems. That is, a main object of the present invention is to improve the efficiency and the accuracy of operators in the sorting operation performed manually without using complex and expensive apparatuses. 
       Solution to Problem 
       [0018]    To achieve the main object, an information processing device of the present invention includes: 
         [0019]    an acquisition unit that acquires information on an operation executed on a processing object from a document associated with the processing object; 
         [0020]    a detection unit that detects a position of the processing object; and 
         [0021]    a notification control unit that detects an operation content for the processing object based on rules which are data correlated with the information on the operation and the operation content which uses the information, and notifying the operation content by controlling a notification device that notifies the operation content. 
         [0022]    An information processing system of the present invention includes: 
         [0023]    the information processing device of the present invention; 
         [0024]    an information acquisition device that provides information representing the content of the document to the acquisition unit; 
         [0025]    an information providing device that provides information on the position of the processing object to the detection unit; and 
         [0026]    the notification device. 
         [0027]    A distribution system of the present invention includes the information processing system of the present invention, 
         [0028]    wherein the notification device notifies a sorting destination to which the processing object is sorted as information representing the operation content for the processing object. 
         [0029]    An information processing method of the present invention, the information processing method for causing a computer to execute: 
         [0030]    acquiring information on an operation executed on a processing object from a document associated with the processing object; 
         [0031]    detecting an operation content for the processing object based on rules which are data correlated with the information on the operation and the operation content which uses the information; and 
         [0032]    notifying the operation content. 
         [0033]    A program storage medium of the present invention, the program storage medium storing a computer program for causing a computer to execute: 
         [0034]    a process of acquiring information on an operation executed on a processing object from a document associated with the processing object; 
         [0035]    a process of detecting a position of the processing object; 
         [0036]    a process of detecting an operation content for the processing object based on rules which are data correlated with the information on the operation and the operation content which uses the information; and 
         [0037]    a process of notifying the operation content. 
         [0038]    The main object of the present invention can be also achieved by an information processing method corresponding to the information processing device of the present invention. Further, the main object of the present invention can be also achieved by a computer program that realizes the information processing device and the information processing method of the present invention or a program storage medium that stores the computer program. 
       Advantageous Effects of Invention 
       [0039]    The present invention enable to improve the efficiency and the accuracy of operators in the sorting operation performed manually without using complex and expensive apparatuses. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0040]      FIG. 1  is a block diagram illustrating a simplified configuration of an information processing system according to a first exemplary embodiment of the present invention. 
           [0041]      FIG. 2  is a block diagram illustrating an example of hardware components that realize the information processing system according to the first exemplary embodiment. 
           [0042]      FIG. 3  is a flowchart illustrating the flow of processing of the information processing system according to the first exemplary embodiment. 
           [0043]      FIG. 4  is a diagram illustrating an example of a sorting object. 
           [0044]      FIG. 5  is a diagram illustrating an example of a destination label attached to a sorting object in the first exemplary embodiment. 
           [0045]      FIG. 6  is a diagram illustrating an example of sorting destination information stored in a database in the first exemplary embodiment. 
           [0046]      FIG. 7  is a diagram representing a distribution system including the information processing system according to the first exemplary embodiment. 
           [0047]      FIG. 8  is a diagram representing a distribution system including the information processing system according to the first exemplary embodiment. 
           [0048]      FIG. 9  is a diagram representing a distribution system including an information processing system according to a second exemplary embodiment of the present invention. 
           [0049]      FIG. 10  is a diagram representing a distribution system including an information processing system according to a third exemplary embodiment of the present invention. 
           [0050]      FIG. 11  is a flowchart illustrating the flow of processing of the information processing system  1  according to the third exemplary embodiment. 
           [0051]      FIG. 12  is a diagram representing a distribution system including an information processing system according to a fourth exemplary embodiment of the present invention. 
           [0052]      FIG. 13  is a block diagram illustrating a simplified configuration of an information processing device according to a fifth exemplary embodiment of the present invention. 
           [0053]      FIG. 14  is a diagram representing the information processing device according to the fifth embodiment. 
           [0054]      FIG. 15  is a block diagram illustrating a simplified configuration of an information processing system according to a sixth exemplary embodiment of the present invention. 
           [0055]      FIG. 16  is a diagram illustrating other exemplary embodiments of the present invention. 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0056]    First, in exemplary embodiments of the present invention, “means,” “device,” or “system” does not simply mean a physical means but the function of the “means,” “device,” or “system” may be realized by software. Moreover, the functions of one “means,” “device,” or “system” may not necessarily be realized by one physical means or device but may be realized by two or more physical means or devices. Further, the functions of two or more “means,” “devices,” or “system” may be realized by one physical means or device. 
         [0057]    Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. 
       First Exemplary Embodiment 
       [0058]      FIGS. 1 to 8  are diagrams representing a first exemplary embodiment of the present invention. 
         [0059]    First, an outline of the first exemplary embodiment will be described with reference to  FIGS. 4, 5 and 7 . A sorting system which is a distribution system according to the first exemplary embodiment is applied to a distribution center or the like of a parcel service, for example. In this sorting system, as illustrated in  FIG. 7 , a sorting operator  111  examines a destination of a sorting object (processing object)  200  placed on a sorting table  400  and moves the sorting object  200  to a sorting destination  300  corresponding to the destination. 
         [0060]    In such a sorting operation, generally, the sorting operator  111  recognizes the sorting destination  300  by examining a destination label  210  (see  FIG. 4 ) attached to the sorting object  200 . Subsequently, the sorting operator  111  carries the sorting object  200  to the sorting destination  300 . 
         [0061]    As described above, the sorting operator  111  reads information described in the destination label  210  of the sorting object  200  and recognizes the sorting destination  300  based on the information described in the destination label  210 . However, generally, a number of items of information are described in the destination label  210 , and the information used for sorting of the sorting object  200  is a portion of the items of information described in the destination label  210 . Thus, a situation in which the sorting operator  111  wrongly reads the information used for the sorting from the destination label  210  and recognizes the wrong sorting destination  300  of the sorting object  200  may occur. 
         [0062]    Thus, in the first exemplary embodiment, a recognition device  520  recognizes the destination label  210  and the shape of the sorting object  200  using an image captured by a camera  500 . After that, the sorting object  200  is conveyed to the sorting table  400  by a conveying device  700 . Moreover, a projection device  610  detects the sorting destination  300  of the sorting object  200  captured by the camera  530  and projects a sorting destination projection image  230  (see  FIG. 4 ) representing the sorting destination  300  to an upper surface of the sorting object  200  with the aid of a projector  600 . The sorting operator  111  examines the sorting destination projection image  230  and moves the sorting object  200  to the sorting destination  300  according to the sorting destination projection image  230 . As a result, the sorting operator  111  can perform the sorting operation without recognizing and understanding the content of the destination label  210 . Thus, the sorting operator  111  can accelerate the sorting operation and to decrease sorting errors. 
         [0063]    The projector  600  starts projecting the sorting destination projection image  230  to the sorting object  200  when the sorting object  200  enters a projection area. Moreover, the projector  600  ends projecting the sorting destination projection image to the sorting object  200  when the sorting object  200  deviates from the projection area or when the sorting object  200  is not captured by the camera  530  even if the sorting object is in the projection area. 
         [0064]    In the example of  FIG. 7 , although one camera  530  and one projector  600  are depicted, the number and the position of each of the cameras  530  and the projectors  600  may be changed appropriately according to the size of the capturing area of the camera  530  and the projection area of the projector  600 . 
         [0065]    Next, a configuration of an information processing system according to the first exemplary embodiment of the present invention will be described with reference to  FIG. 1 . The reference numerals in  FIG. 1  are assigned to respective elements as examples to facilitate understanding of the present invention for the sake of convenience and are not intended to limit the present invention. 
         [0066]    An information processing system  100  according to the first exemplary embodiment includes the recognition device  520  and the projection device  610 . The recognition device  520  includes the camera  500 , a control device  550 , and a database  560 . The recognition device  520  captures the whole shape of the sorting object  200  (see  FIG. 4 ) conveyed sequentially and the destination label  210  attached to the sorting object  200  with the aid of the camera  500 , and recognizes the destination and the shape of the sorting object. 
         [0067]    That is, the camera  500  captures the whole shape and the destination label  210  of the sorting object  200 . For example, a plurality of cameras  500  may be arranged so as to capture different positions of the same sorting object  200 . This is because the attachment position of the destination label  210  in relation to the sorting object  200  is not fixed. Thus, by capturing the sorting object  200  from various directions, it is possible to capture the destination label  210  more reliably. Moreover, in case that a plurality of sorting objects  200  is present, the plurality of cameras  500  may be arranged so as to capture different places. In this way, these cameras  500  can capture a plurality of sorting objects  200  and the destination labels  210  attached to the sorting objects  200  simultaneously. 
         [0068]    Moreover, for example, the same sorting object  200  may be captured at different places by one camera  500  while moving or rotating the sorting object  200 . In this way, even when only one camera  500  is installed, it is possible to easily capture the destination label  210  and the whole shape of the sorting object  200 . Moreover, the sorting object  200  may be disposed so that the destination label  210  faces a predetermined direction. Besides this, a dedicated label having an easily recognizable shape as the destination label  210  may be attached to an easily recognizable position of the sorting object  200 . In this manner, various methods and device configurations for allowing the camera  500  to reliably capture the destination label  210  of the sorting object  200  may be considered. A specific method and device configuration may be selected depending on a situation in which the present invention is implemented. 
         [0069]    Moreover, the operation of the camera  500  may be controlled by the control device  550 , and for example, the camera  500  may include a control unit (not illustrated) and the control unit may control the operation of the camera  500 . The camera  500  is connected to the control device  550  via a cable or wireless information communication network. 
         [0070]    The control device  550  acquires the destination data described in the destination label  210  by processing the image (still image) or the video (moving images) of the destination label  210  captured by the camera  500 . That is, the control device  550  functions as an acquisition unit that acquires information (the destination data) used for an operation (the sorting operation) executed with respect to a processing object (the sorting object  200 ) from a document (the destination label  210 ) attached to the processing object based on an image captured by the camera  500 . Moreover, the camera  500  functions as an information acquisition device that provides the content of the document (the destination label  210 ) attached to the processing object to the acquisition unit (the control device  550 ). 
         [0071]    Data correlated with the destination data and the data indicating the sorting destination  300  is stored in the database  560 . That is, the rules which are the data correlated with the information (the destination data) used for the sorting operation and an operation content (the data indicating the sorting destination  300 ) which uses the information are stored in the database  560 . 
         [0072]    The control device  550  acquires data indicating the sorting destination  300  correlated with the acquired destination data from the database  560 . That is, the control device  550  detects the operation content (the sorting destination  300 ) for the processing object (the sorting object  200 ). The control device  550  reads the destination data from the captured image (video) of the destination label  210  using an optical character recognition (OCR) function, for example. Moreover, relation data correlated with final destination information described in the destination label  210  and the delivery route information thereof and relation data correlated with the delivery route information and the data indicating the sorting destination  300  may be stored in the database  560 . In this case, the control device  550  may read the delivery route information from the database  560  based on the final destination information described in the destination label  210  and determine the sorting destination  300  based on the read delivery route information. In this case, the sorting destination  300  is set to a sorting destination according to the parcel (item) stopover station in the middle of the delivery route, for example. 
         [0073]    Moreover, in case that a plurality of items of other information (address, postal code, telephone number, and the like) related to the destination is described in the destination label  210 , the control device  550  may determine the sorting destination  300  according to a predetermined priority order of the information. 
         [0074]    Further, the sorting object  200  may be sorted by taking the weight, the size, the delivery method and the like of the sorting object  200  into consideration, for example, rather than being sorted according to the destination only. In this case, for example, data (rule table  561 ) used for sorting as illustrated in  FIG. 6  is stored in the database  560 . Moreover, the control device  550  reads information such as the weight, the size and the delivery method as well as the information related to the destination from the destination label  210  of the sorting object  200 . 
         [0075]    The control device  550  registers the data correlated with the data of the recognized shape of the sorting object  200  and the data of the acquired sorting destination  300  in the database  560 . 
         [0076]    The distribution system  101  having the information processing system  100  of the first exemplary embodiment includes the conveying device  700  and the sorting table  400 . The conveying device  700  is configured as a belt conveyor, for example, and conveys the sorting object  200 . In the first exemplary embodiment, the camera  500  of the recognition device  520  is disposed at such a position as to capture the sorting object  200  conveyed by the conveying device  700 . The control device  550  has a function of controlling the driving of the conveying device  700  so that the sorting object  200  can be captured appropriately by the camera  500 . That is, the control device  550  also has a function of a conveyance control device. In the first exemplary embodiment, the sorting object  200  conveyed by the conveying device  700  is configured to be guided to the sorting table  400  through an introduction path  710 . 
         [0077]    Next, the configuration of the projection device  610  will be described. The projection device  610  includes the camera  530 , the projector  600 , and the control device  620 . The projection device  610  may include a plurality of projectors  600 , for example. Moreover, a plurality of cameras  530  may be provided instead of only one camera. 
         [0078]    The camera  530  captures the sorting object  200  present on a working table (the sorting table  400  illustrated in  FIG. 7 ). The control device  620  recognizes the shape and the location of the sorting object  200  using the image captured by the camera  530 . That is, the control device  620  functions as a detection unit that detects the location of a processing object. Moreover, the camera  530  functions as an information providing device that provides the information on the location of the processing object (the sorting object  200 ) to the detection unit (the control device  620 ). 
         [0079]    The control device  620  is communicably connected to the control device  550  of the recognition device  520  and receives, from the control device  550 , the information related to the sorting object  200  recognized by the control device  550 . The control device  620  compares the recognized shape of the sorting object  200  with the shape of the sorting object  200  recognized by the control device  550 . Moreover, the control device  620  detects the sorting object  200  having a shape that matches the shape of the sorting object  200  captured by the camera  530  among the sorting objects  200  recognized by the control device  550 . In this case, it is more preferable for the control device  620  to take information other than the shape into consideration in addition to the shape of the sorting object  200 . For example, the control device  550  of the recognition device  520  acquires information other than the shape of the sorting object  200 , such as the capturing time of the sorting object  200  captured by the camera  500  and the color of the sorting object  200  based on the captured image. Further, the control device  620  of the projection device  610  also acquires information other than the shape of the sorting object  200 , such as the capturing time of the sorting object  200  captured by the camera  530  and the color of the sorting object  200  based on the captured image. Further, the control device  620  detects the sorting object  200  captured by the camera  530  based on the plurality of types of information acquired from the control device  550  and the various types of information acquired based on the captured image obtained by the camera  530 . In this way, it is possible to improve the detection accuracy of the sorting object  200 . Further, the control device  620  acquires the sorting destination information correlated with the detected sorting object  200 . That is, the control device  620  detects the sorting destination  300  of the sorting object  200  captured by the camera  530 . 
         [0080]    In case that a plurality of the sorting objects  200  are present in the captured image obtained by the camera  530 , the control device  620  detects the sorting destinations  300  of the respective sorting objects  200 . Moreover, the control device  620  has a function capable of tracking the movement of the sorting object  200  based on the captured image obtained by the camera  530 . 
         [0081]    The projector  600  is a notification device that executes a projection operation according to a control operation of the control device  620 . That is, the projector  600  projects the information (for example, the sorting destination projection image  230  (see  FIG. 4 )) on the sorting destination  300  to the sorting object  200  or to the vicinity thereof based on the information on the recognized location of the sorting object  200 . The sorting destination projection image  230  is a character indicating the sorting destination  300  or an image of a figure, a symbol or the like related to the sorting destination  300 , for example. Further, a character that describes the content of the sorting operation to the sorting operator  111  may be included in the sorting destination projection image  230 . 
         [0082]    That is, the control device  620  functions as a notification control unit that detects the operation content on the processing object based on the rules which are the data correlated with the information (the content of the destination label  210 ) used for the operation and the operation content and controls the projector  600  to send a notification of the operation content. 
         [0083]    Although the control device  550 , the database  560 , and the control device  620  are illustrated as individual components in  FIG. 1 , these components may be integrated into one device and two of these components may be integrated into the same device. Moreover, these components may be configured as different devices according to the function, for example. 
         [0084]    Next, the configuration of hardware components that realize the information processing system  100  of the first exemplary embodiment will be described with reference to  FIG. 2 . 
         [0085]      FIG. 2  is a block diagram representing a configuration example of a computer  40  which is a hardware component that realizes the recognition device  520  and the projection device  610  that form the information processing system  100  according to the first exemplary embodiment. The computer  40  includes a central processing unit (CPU)  1 , a random access memory (RAM)  2 , a storage device  3 , a communication interface  4 , an input device  5  and an output device  6 . 
         [0086]    The functions of the control device  550  of the recognition device  520  and the control device  620  of the projection device  610  are realized by the CPU  1  that executes a computer program (program) read from the RAM  2 . That is, the CPU  1  and the RAM  2  configure the control device  550  of the recognition device  520  and the control device  620  of the projection device  610  respectively. The storage device  3  is a device (storage medium) that includes a disk memory such as a hard disk, a flash memory and an optical disc, or a semiconductor memory, for example. The storage device  3  configures the database  560 . The communication interface  4  is connected to the CPU  1  and has a function of connecting the CPU  1  to an information communication network or an external storage medium. External data may be imported into the CPU  1  via the communication interface  4 . 
         [0087]    The input device  5  is configured as the cameras  500  and  530 . The output device  6  is configured as the projector  600 . The above-described hardware components that configure the information processing system  100  are examples only, and the respective constituent elements illustrated in  FIG. 2  may be configured as independent logical circuits. Moreover, the computer  40  may include a keyboard, a mouse, and a touch panel, for example, as the input device  5 . Moreover, the computer  40  may include a display, for example, as the output device  6 . 
         [0088]    Hereinafter, the configuration of the information processing system  100  according to the first exemplary embodiment will be described in detail. 
         [0089]      FIG. 4  is a diagram illustrating an example of the sorting object  200 . Although the sorting object  200  illustrated in  FIG. 4  has a rectangular parallelepiped shape, the sorting object  200  may have a shape other than the rectangular parallelepiped shape, such as a spherical shape. 
         [0090]    As illustrated in  FIG. 4 , the destination label  210  is attached to the sorting object  200 . Moreover, the sorting destination projection image  230  is projected to the surface (the upper surface (top surface) in the example of  FIG. 4 ) of the sorting object  200  by the projector  600 . The sorting destination projection image  230  is an image representing the information (for example, a character, a figure, a mark or the like representing the sorting destination  300 ) necessary for the sorting operation. By looking at the sorting destination projection image  230 , the sorting operator  111  can understand the content of the sorting operation to be executed and sort the sorting object  200 . 
         [0091]      FIG. 5  is a diagram illustrating an example of the destination label  210  attached to the sorting object  200 . The destination label  210  is a delivery slip, for example. In the destination label  210 , a destination postal code area  211 , a destination telephone number area  212 , a destination address and name area  213 , a client postal code area  214  and a client telephone number area  215  are set. Further, in the destination label  210 , a client address and name area  216 , a delivery date area  217 , a delivery baggage content area  218 , a delivery baggage dimension area  219 , a slip number area  220 , and a slip number barcode area  221  are set. 
         [0092]    Besides these areas, a delivery type area that describes whether the corresponding parcel is for normal delivery or not, an area that describes an inquiry number for identifying a parcel, and the like may be set in the destination label  210 . Moreover, the destination label  210  may have various formats, and the form of the destination label  210  is not limited to the form illustrated in  FIG. 5 . 
         [0093]    The destination postal code area  211  is an area in which the postal code of the destination (shipping address) is described. For example, a number (for example, 000-1111) is described in the destination postal code area  211 . The destination telephone number area  212  is an area in which the telephone number (a fixed telephone number, a mobile phone number or the like) of the destination is described. A number (for example, 090-0000-1111) is described in the destination telephone number area  212 . The destination address and name area  213  is an area in which the address, the name and the like of the destination are described. For example, the prefectures, the municipalities, the building name and the name (for example, Taro Nippon, 1-1, Chiyoda-ku, Tokyo) are described in the destination address and name area  213 . 
         [0094]    The client postal code area  214  is an area in which the postal code of the client (sender) is described. For example, a number (for example, 000-2222) is described in the client postal code area  214 . The client telephone number area  215  is an area in which the telephone number (a fixed telephone number, a mobile phone number, or the like) of the client is described. For example, a number (for example, 090-0000-2222) is described in the client telephone number area  215 . The client address and name area  216  is an area in which the address, the name and the like of the client are described. For example, the prefectures, the municipalities, the building name and the name (for example, Taro Denki, 2-2, Chiyoda-ku, Tokyo) are described in the client address and name area  216 . 
         [0095]    The delivery date area  217  is an area in which the date of delivery is described. For example, the date and the hours (for example, 12 to 14 of January 1) on which a baggage is delivered are described in the delivery date area  217 . The delivery baggage content area  218  is an area in which the content of a delivery baggage is described. For example, the name or the classification (for example, food and books) of the article included in the delivery baggage is described in the delivery baggage content area  218 . The delivery baggage dimension area  219  is an area in which the information (dimension and cost) of the delivery baggage is described. For example, the size and the weight of a delivery baggage and a delivery charge (for example, a size: 120, a weight: 2 kg or lower and a delivery charge: 1500 yens) are described in the delivery baggage dimension area  219 . The slip number area  220  is an area in which a slip number is described. The slip number barcode area  221  is an area in which a barcode indicating a slip number is described. 
         [0096]      FIG. 6  is a diagram illustrating an example of the information (the sorting destination information) representing the sorting destination  300  stored in the database  560 . The sorting destination information illustrated in  FIG. 6  is the rule table  561 , for example. The rule table  561  is a table (list) that correlates the content described in the destination label  210  and the name (sorting destination name) representing the sorting destination  300 . The rule table  561  includes items such as a sorting destination name, a destination prefecture name (final destination), the weight of the sorting object, the size (dimension) of the sorting object, and a delivery method. 
         [0097]    For example, the rule table  561  represents that the destination prefecture name (final destination) correlated with the sorting destination name “A” is “Okinawa prefecture,” and the weight of the sorting object is “2 to 5 kg”. Further, the rule table  561  represents that the size (dimension) of the sorting object correlated with the sorting destination name “A” is less than 20×20×20 cm 3  and the delivery method is a “normal delivery”. The rule table  561  is not limited to the form illustrated in  FIG. 6  but may be arbitrary information as long as the information is rule information used for the control device  550  to detect the sorting destination  300  based on the destination data acquired from the destination label  210 , for example. 
         [0098]    Moreover, the rule table  561  may be a table representing the regulation (rule) by which the sorting destination  300  (the operation content) is determined based on some items selected from a plurality of items of the rule table  561 . Moreover, the rule table  561  may be a table representing the regulation (rule) by which the sorting destination  300  (the operation content) is determined based on all items of the rule table  561 . Further, the rule table  561  may be a table representing the regulation (rule) by which the sorting destination  300  (the operation content) is determined by considering a predetermined priority order of a plurality of items of the rule table  561 . 
         [0099]      FIG. 7  is a model diagram representing the distribution system  101  including the information processing system  100  according to the first exemplary embodiment. In the distribution system  101 , the recognition device  520  captures the sorting object  200  with the aid of the camera  500  and recognizes the destination and the shape of the sorting object  200  based on the captured image. When the processing of the recognition device  520  ends, the sorting object  200  is conveyed by the conveying device  700  and is moved to the sorting table  400  through the introduction path  710 . 
         [0100]    The projection device  610  detects the sorting destination  300  of the sorting object  200  on the sorting table  400  based on the captured image obtained by the camera  530  and projects the information representing the sorting destination  300  to the sorting object  200  with the aid of the projector  600 . One or both of the camera  530  and the projector  600  may be provided to be movable. In this case, for example, the control device  620  performs control so that the camera  530  is moved to a position at which the sorting object  200  can be captured appropriately or performs control so that the projector  600  is moved to a position at which an image can be projected appropriately to the sorting object  200 . 
         [0101]      FIG. 8  is a diagram illustrating a state in which the sorting operator  111  executes the sorting operation when seen from the lateral side of the sorting operator  111 . In the example of  FIG. 8 , the camera  530  has a capturing area  540  in which the entire upper surface of the sorting table  400  can be captured and can capture a plurality of sorting objects  200  simultaneously. Based on the captured image of the camera  530 , the shape, the sorting destination  300  and the like of each sorting object  200  on the sorting table  400  are detected by the control device  620 . In the example of  FIG. 8 , a plurality of projectors  600  is provided, and each projector  600  projects the information (the sorting destination projection image  230 ) representing the sorting destination  300  to the upper surface of the sorting object  200  in the projection area  630 . Only one projector  600  may be provided rather than the plurality of projectors  600 . In this case, the projector  600  has the projection area  630  in which an image can be projected to the entire upper surface area of the sorting table  400 . 
         [0102]    The sorting destination projection image  230  may be an image by which the sorting operator  111  can easily determine the sorting destination  300  and may be an image by which the sorting destination  300  can be determined based on a character such as a code number, a symbol, a figure, a shape, a color, or a combination thereof. Moreover, the sorting destination projection image  230  may change with time, for example. 
         [0103]    Due to the fact that the surface color of the sorting object  200  is other than the white, the color of the image (the sorting destination projection image  230 ) projected to the sorting object  200  by the projector  600  may be different from an expected color. Thus, the sorting operator  111  may have difficulties in perceiving the sorting destination projection image  230 . In such a case, for example, the control device  620  may detect the surface color of the sorting object  200  based on the image captured by the camera  530  and change the color of the sorting destination projection image  230  so that the sorting destination projection image  230  projected to the sorting object  200  is clearly visible. Moreover, the sorting destination projection image  230  may indicate the sorting destination  300  using a combination of a color, a code number and the like. 
         [0104]    Moreover, the control device  620  may rotate or move the sorting destination projection image  230  to be projected to the sorting object  200  according to the position and the direction of any one of the sorting object  200 , the sorting operator  111  and the sorting destination  300 . Moreover, for example, the control device  620  is given data that determines the direction of the sorting destination projection image  230  to be projected based on a relative position of the sorting object  200  in relation to the sorting destination  300 . In such a case, the control device  620  may rotate or move a portion or an entire portion of the sorting destination projection image  230  to be projected based on the data according to the relative position of the sorting object  200  in relation to the sorting destination  300 . In such a case, the projection device  610  (the control device  620 ) can continue projecting the sorting destination projection image  230  to the sorting object  200  while tracking the moving sorting object  200 . The control device  620  may project an image indicating the direction to the sorting destination  300  using a symbol or a text based on the direction determined by the relative position with the aid of the projector  600 . 
         [0105]    Moreover, the control device  620  may change the content of the sorting destination projection image  230  to be projected according to the situation of the sorting operator  111 . That is, the sorting operator  111  may be present at a place distant from the sorting destination  300 . Moreover, a workload may be different depending on the sorting operator  111 , and there is a case in which it is preferable to adjust the workload so that the workloads of respective sorting operators  111  are equalized. With such a case taken into consideration, the projection device  610  may include a function of detecting the location of the sorting operator  111 . For example, the configuration of detecting the location of the sorting operator  111  has a camera that captures the sorting operator  111  and a computer that detects the position of the sorting operator  111  based on the captured image obtained by the camera. Moreover, the control device  620  may have a function of determining a person in charge responsible for sorting the sorting object  200  using the workload or the like of the sorting operator  111  based on the location of the sorting operator  111 , the information on the sorting object  200  obtained from the control device  550  and the like. Further, the control device  620  may have a function of controlling the projector  600  so that the name or the like of the sorting operator  111  determined as the person in charge responsible for sorting the sorting object  200  is projected to the sorting object  200  as the sorting destination projection image  230 . Furthermore, the control device  620  may have a function of detecting the sorting operator  111  as the person in charge approaching the sorting object  200  or the sorting operator  111  as the person in charge stretching out his or her hands toward the sorting object  200 . Moreover, the control device  620  may have a function of changing the content of the sorting destination projection image  230  being projected to the sorting object  200 , for example, from the information representing the name or the like of the sorting operator  111  as the person in charge to the information representing the sorting destination  300  when such a situation is detected. 
         [0106]    Further, the control device  620  may include a time measurement unit (not illustrated) that measures the time elapsed after the sorting object  200  is detected based on the captured image obtained by the camera  530 . Moreover, the control device  620  may have a function of changing the content of the sorting destination projection image  230  to be projected by the projector  600  based on a predetermined rule according to the time (the time elapsed after the sorting object  200  is detected) measured by the time measurement unit. Further, the control device  620  may include a timer (not illustrated) that detects the elapse of a predetermined period Ts after the sorting object  200  is detected based on the captured image obtained by the camera  530 . In this case, for example, the control device  620  drives the timer when the sorting object  200  is detected based on the captured image obtained by the camera  530 . Moreover, the control device  620  may change the content of the sorting destination projection image  230  to be projected by the projector  600  when the timer detects the elapse of the predetermined period Ts. As a specific example, the sorting destination projection image  230  is changed from the image representing the sorting destination  300  to an image such as a character or a mark for pushing the sorting operator to perform the sorting operation of the sorting object  200 . If the sorting object  200  is continuously detected even when the predetermined period Ts is elapsed after the sorting object  200  is detected, there is a possibility that the operator has forgotten sorting the sorting object  200 . The configuration, which presses the operator to perform the sorting operation as described above by taking such the situation into consideration, enables to cause the operator to preferentially execute the sorting operation of the sorting object  200  being forgotten to be sorted. 
         [0107]    Furthermore, the control device  620  may project a business contact to the sorting operator  111  as well as the sorting destination projection image  230  to the sorting object  200  or the vicinity thereof by controlling the projector  600 . 
         [0108]    Moreover, the control device  620  may project the information related to the sorting object  200  together with the sorting destination projection image  230  to the sorting object  200  or the vicinity thereof by controlling the projector  600 . For example, the information related to the sorting object  200  includes the weight of the sorting object  200 , precautions on handling such as “This side up” or “Do not stack,” and the period in which the sorting object is left on the sorting table  400 . Further, the information related to the sorting object  200  includes additional information such as a shipping time according to the sorting destination  300  and the order when the sorting object is stacked on the roll box pallet  310  which is the sorting destination  300 . Further, the information related to the sorting object  200  includes additional information such as the location of the sorting objects  200  of the same class to be sorted to the same sorting destination  300  and warning statements on the sorting object  200  left unprocessed for a long period. 
         [0109]    As described above, depending on the addition information projected to the sorting object  200  or the vicinity thereof, a weight measurement device may be provided in the sorting table  400 . 
         [0110]    Next, the operation (the flow of processing) of the information processing system  100  according to the first exemplary embodiment will be described based on  FIG. 3 .  FIG. 3  is a flowchart illustrating the flow of processing of the information processing system  100  (the control device  550  and the control device  620 ). The flow of processing illustrated in  FIG. 3  is an example, and the processing order may be changed appropriately and processing may be repeated. 
         [0111]    Moreover, processing may be executed in parallel within such a range that will not cause inconsistency in the processing content. Further, other process may be added between respective processes. 
         [0112]    First, the control device  550  registers (sets up) the information on the sorting destination  300  in the database  560  (step S 101 ). The information of the sorting destination  300  may be registered in advance in the database  560 . 
         [0113]    Subsequently, the control device  550  moves the sorting object  200  to the capturing area of the camera  500  of the recognition device  520  by controlling the conveying device (for example, a belt conveyor)  700  (step S 102 ). 
         [0114]    Subsequently, the control device  550  captures the sorting object  200  by controlling the camera  500 . Moreover, the control device  550  acquires the content of the destination label  210  attached to the sorting object  200  based on the image of the sorting object  200  captured by the camera  500 . Moreover, the control device  550  detects the shape of the sorting object  200  based on the captured image obtained by the camera  500  (step S 103 ). When the information (for example, 20 cm×30 cm×30 cm) on the size of the sorting object  200  is described in the destination label  210 , the control device  550  may read the information from the captured image obtained by the camera  500 . Moreover, the camera  500  rather than the control device  550  may have a function of the acquiring information from the captured image. In this case, the camera  500  may acquire the content of the destination label  210  of the sorting object  200  and detect the shape of the sorting object  200 . Moreover, the camera  500  may transmit the information detected in this manner to the control device  550  by cable or wireless communication. 
         [0115]    The control device  550  compares the information of the sorting object  200  obtained based on the captured image obtained by the camera  500  with the rule table  561  of the database  560 , for example, and detects the sorting destination  300  of the sorting object  200  (step S 104 ). Moreover, the control device  550  stores the sorting destination information in a temporarily storage area (not illustrated), for example, by correlating a unique identification number (ID), an acquisition time, and shape information of the sorting object  200  with the data (sorting destination information) of the detected sorting destination  300 . Moreover, the sorting destination information is transmitted from the control device  550  to the control device  620  of the projection device  610 . 
         [0116]    After that, the control device  550  conveys the sorting object  200  to the sorting table  400  by controlling the conveying device  700  (step S 105 ). 
         [0117]    Moreover, based on the control of the control device  620  of the projection device  610 , the camera  530  captures the sorting object  200  conveyed to the sorting table  400 . The control device  620  detects the shape of the sorting object  200  based on the captured image obtained by the camera  530 . Further, the control device  620  acquires the ID correlated with the sorting object  200  on the sorting table  400  from the sorting destination information transmitted from the control device  550  based on the detected shape of the sorting object  200 . Moreover, the control device  550  detects the sorting destination  300  of the sorting object  200  on the sorting table  400  based on the sorting destination information and the detected shape of the sorting object  200 . Further, the control device  550  acquires the location information of the sorting object  200  on the sorting table  400  (step S 106 ). 
         [0118]    The control device  620  projects the sorting destination projection image  230  representing the sorting destination  300  to the sorting object  200  on the sorting table  400  or the vicinity thereof by controlling the projector  600  (step S 107 ). 
         [0119]    After that, the control device  620  determines whether the sorting object  200  is present in the capturing area  540  of the camera  530  based on the captured image obtained by the camera  530  (step S 108 ). When the sorting object  200  is present, the operation subsequent to step S 106  is repeated. In this way, the projection device  610  continues projecting the sorting destination projection image  230  to the sorting object  200  or the vicinity thereof. 
         [0120]    Moreover, when it is determined in step S 108  that the sorting object is not present, the control device  620  stops projecting the sorting destination projection image  230  and ends processing. That is, the sorting destination projection image  230  is continuously projected in a period in which the sorting object  200  is not processed by the sorting operator  111  and the sorting object  200  is present on the sorting table  400 . Moreover, when the sorting object  200  is moved from the sorting table  400  by the sorting operator  111 , projection of the sorting destination projection image  230  ends. There may be a case in which the sorting object  200  enters into the shadow of the sorting operator  111  or another sorting object  200  and is not captured by the camera  530 . In this case, projection of the sorting destination projection image  230  ends. 
         [0121]    The information processing system  100  of the first exemplary embodiment executes the above-described processing. 
         [0122]    When the information processing system  100  of the first exemplary embodiment is employed, the sorting operator  111  moves the sorting object  200  to the sorting destination  300  based on the sorting destination projection image  230  projected to the sorting object  200 . The information processing system  100  of the first exemplary embodiment executes a series of processes involving recognition of the sorting object  200  and projection of the sorting destination projection image  230  to the sorting object  200  with the aid of the control devices  550  and  620 . Thus, the sorting operator  111  does not need to perform an operation of operating the cameras  500  and  530  to capture the sorting object  200  and an operation of operating the control device  620  so that image processing related to recognition of the sorting object  200  is executed. 
         [0123]    In the above description, although processing of one sorting object  200  has been described, the information processing system  100  can process a plurality of sorting objects  200  in parallel. 
         [0124]    That is, when a plurality of sorting objects  200  is included in the captured image obtained by each of the cameras  500  and  530 , the control device  550  of the recognition device  520  and the control device  620  of the projection device  610  can perform the shape recognition process and the like individually for the respective sorting objects  200 . In the example of  FIG. 1 , although one projection device  610  is connected to one recognition device  520 , a plurality of projection devices  610  may be connected to one recognition device  520 . 
         [0125]    The information processing system  100  of the first exemplary embodiment is configured in the above-described manner. In this way, the information processing system  100  can provide the following advantages. 
         [0126]    That is, in the information processing system  100  of the first exemplary embodiment, the control device  550  recognizes the shape of the sorting object  200  and acquires the destination data from the destination label  210  based on the image captured by the camera  500  of the recognition device  520 . Further, the control device  550  acquires the information of the sorting destination  300  of the sorting object  200  from the database  560  based on the destination data. The control device  620  of the projection device  610  recognizes the shape and the location of the sorting object  200  on the sorting table  400  based on the captured image obtained by the camera  530 . Moreover, the control device  620  receives from the control device  550  the data correlated with the shape information of the sorting object  200  recognized by the control device  550  of the recognition device  520  and the information of the sorting destination  300  of the sorting object  200 . Further, the control device  620  detects the sorting destination  300  of the recognized sorting object  200  based on the recognized shape information of the sorting object  200  and the data received from the control device  550 . Furthermore, the control device  620  projects the sorting destination projection image  230  representing the sorting destination  300  to the sorting object  200  or the vicinity thereof by controlling the projector  600 . By using the information projected to the sorting object  200 , the sorting operator  111  can recognize the sorting destination  300  of the sorting object  200  easily and accurately. In this way, the information processing system  100  can improve the efficiency of the sorting operation and to decrease sorting errors. 
         [0127]    Moreover, the information processing system  100  enables the sorting operation to be performed even when the sorting operator  111  does not have prior knowledge necessary for reading (understanding) the destination label  210  of the sorting object  200 . In this way, the information processing system  100  can reduce errors of the sorting operator  111  reading or judging the sorting destination  300 . Thus, the information processing system  100  enables to improve the efficiency of the sorting operation. 
         [0128]    In the above example, the projector  600  projects the sorting destination projection image  230  to the sorting object  200  using visible light. Instead of this, the projector  600  may emit invisible light (for example, infrared light) to the sorting object  200  so that the sorting destination projection image  230  floats on the sorting object  200 . That is, a special paint that exhibits colors (light) in response to invisible light may be applied in advance to the sorting object  200 . Alternatively, a seal or the like to which such a special paint is applied may be attached in advance to an upper surface of the sorting object  200 , for example, outside the destination label  210 . Moreover, when the projector  600  projects the sorting destination projection image  230  to the sorting object  200  using invisible light, the paint reacts to the invisible light so that the sorting destination projection image  230  floats. In this way, the sorting operator  111  can see (recognize) the sorting destination projection image  230  with naked eyes. 
         [0129]    When the projector  600  emits visible light, the visible light may dazzle the sorting operator  111  to become a hindrance to the visual operation of the sorting operator  111 . However, when the projector  600  emits invisible light, such a problem can be prevented. In this way, a configuration in which the projector  600  emits invisible light can suppress the sorting errors resulting from visible light. 
         [0130]    Further, when the size of the destination label  210  attached to the sorting object  200  is small as compared to the sorting object  200  so that the sorting operator  111  has to look at both the sorting object  200  and the destination label  210 , the burden of the sorting operator  111  increases. That is, in such a case, the sorting operator  111  has to change his or her viewing range when looking at the sorting object  200  and when looking at the destination label  210 . Thus, the burden on the eyes of the sorting operator  111  increases. In contrast, when the information processing system  100  is introduced, since the sorting operator  111  does not need to look at the destination label  210 , it is possible to relieve the burden on the eyes of the sorting operator  111 . This contributes to reduction in errors in the sorting operation and improvement in the efficiency of the sorting operation. 
         [0131]    Moreover, when a plurality of sorting operators  111  sorts the sorting objects  200  moved by a belt conveyor, for example, the moving speed of the sorting object  200  by the belt conveyor is set according to the processing speed of the sorting operator  111  who is behind with operations. In such a case, the sorting operator  111  who is ahead in operations may often wait for the next sorting object  200 , which is a waste of time. In contrast, in the information processing system  100  of the first exemplary embodiment, the sorting object  200  sorted by the sorting operator  111  is placed on the sorting table  400  rather than a belt conveyor. Thus, the sorting operators  111  can perform the sorting operation based on the respective processing speeds. In this way, the sorting operation based on the information processing system  100  of the first exemplary embodiment enables to be performed with higher efficiency than a method which uses a belt conveyor. 
       Second Exemplary Embodiment 
       [0132]    Hereinafter, an information processing system according to a second exemplary embodiment of the present invention and a distribution system including the information processing system will be described. In the description of the second exemplary embodiment, the same constituent elements as those of the information processing system and the distribution system of the first exemplary embodiment will be denoted by the same reference numerals, and the redundant description thereof will not be provided. 
         [0133]      FIG. 9  is a diagram representing the information processing system and the distribution system according to the second exemplary embodiment. 
         [0134]    In the second exemplary embodiment, the information processing system  100  has the same configuration as the information processing system  100  of the first exemplary embodiment. Moreover, the distribution system  101   a  uses a belt conveyor  750  instead of the sorting table  400  that configures the distribution system  101  of the first exemplary embodiment. Moreover, the distribution system  101   a  includes a container  320 , a desk  410 , and a collection box  770 . 
         [0135]    In the second exemplary embodiment, a case in which small sorting objects  200  such as an envelope or a small article are sorted is considered. When the sorting object  200  is a small article, troubles such as destruction or missing are more likely to occur as compared to large articles. The distribution system  101   a  of the second exemplary embodiment is constructed by taking this into consideration. That is, in the distribution system  101   a , first, the sorting operator  111  performs the sorting operation of sorting the sorting object  200  to the container  320  and then moving the container  320  to the sorting destination  300  (the roll box pallet  310  in the example of  FIG. 9 ) corresponding to the container  320 . The distribution system  101   a  of the second embodiment has a configuration that improves the efficiency of such a sorting operation. 
         [0136]    That is, the information processing system  100  that configures the distribution system  101   a  of the second exemplary embodiment recognizes the shape and the sorting destination  300  of the sorting object  200  with the aid of the recognition device  520  similarly to the first exemplary embodiment. Moreover, the information processing system  100  projects the sorting destination projection image  230  representing the recognized sorting destination of the sorting object  200  to the sorting object  200  or the vicinity thereof with the aid of the projector  600  illustrated in  FIG. 8 , for example, of the projection device  610 . The form of the sorting destination projection image  230  is not particularly limited, but various forms may be used as long as the sorting destination projection image  230  can be recognized with the naked eyes of the sorting operator  111 , for example. For example, the sorting destination projection image  230  has the form of a line that connects the character or the symbol representing the destination and the sorting object  200  and may have the form of a frame that surrounds the character or the symbol representing the destination. In the second exemplary embodiment, the sorting destination projection image  230  projected to the sorting object  200  represents the container  320  of the sorting destination rather than the roll box pallet  310 . 
         [0137]    In the distribution system  101   a  of the second exemplary embodiment, the sorting operator  111  recognizes the sorting destination projection image  230  projected to the sorting object  200  or the vicinity thereof by the projector  600  of the information processing system  100 . Moreover, the sorting operator  111  stores the sorting object  200  in a predetermined container  320 . The sorting object  200  may be sorted to a determined area of the desk  410  instead of the container  320  and is sorted according to a predetermined sorting destination. After that, the sorting operator  111  moves the plurality of sorting objects  200  sorted according to the sorting destination to the roll box pallet  310  of the sorting destination  300 . 
         [0138]    In this example, the sorting object  200  is first sorted (classified) by the container  320 . Further, as a tool for sorting the sorting object  200 , for example, a folding container, a dedicated case, a tray, a cardboard box, a packaging wrap, an envelope, a wrapping paper, a rope, a belt, and the like may be used instead of the container  320 . That is, an appropriate tool that takes the shape, the weight, and the like of the sorting object  200  into consideration is used as a sorting tool. 
         [0139]    In the second exemplary embodiment, the belt conveyor  750  is configured to convey the sorting object  200  through an area in which the shape and the sorting destination of the sorting object  200  are recognized by the recognition device  520  and an area in which the sorting destination is projected to the sorting object  200  by the projection device  610 . Since the distribution system  101   a  includes such a belt conveyor  750 , a state in which the sorting object  200  is moved continuously is created. Due to this, a case in which the sorting object  200  passes over the area of the sorting operator  111  who has to handle the sorting object  200  may occur. In such a case, the sorting operator  111  working on the downstream side of the belt conveyor  750  may sort the sorting object  200  which has not been sorted. Moreover, the sorting object  200  which has not been sorted by any one of the sorting operators  111  is collected into the collection box  770  from a terminating end  760  of the belt conveyor  750 . Moreover, the collected sorting object  200  is sorted by being loaded on the belt conveyor  750  again from a starting end  740 . 
         [0140]    The projection device  610  may include a plurality of projectors  600 , and these projectors  600  may be disposed at intervals in a direction in which the sorting object  200  is moved by the belt conveyor  750 . In this case, with movement of the sorting object  200 , the projector  600  that projects the sorting destination projection image  230  to the sorting object  200  is switched. 
         [0141]    Moreover, the driving speed of the belt conveyor  750  is appropriately set by taking the speed of the sorting operation of the sorting operator  111  into consideration. Further, the driving speed of the belt conveyor  750  may be adjusted by a controller (not illustrated) disposed around the sorting operator  111  or a controller (not illustrated) which is a wearable terminal worn on the sorting operator  111 , for example. Furthermore, a device that detects the number of sorting objects  200  being moved by the belt conveyor  750  may be provided. This device is configured to be able to detect the number of sorting objects  200  near the terminating end  760  of the belt conveyor  750 , for example. Moreover, this device is a device which includes a camera and an arithmetic device that detects the number of sorting objects  200  by processing a captured image obtained by the camera, for example. A configuration that adjusts the driving speed of the belt conveyor  750  according to the number of sorting objects  200  detected by such a device and stops the belt conveyor  750  may be included in the distribution system  101   a.    
         [0142]    Since the configurations other than the above-described configuration, of the information processing system  100  and the distribution system  101   a  according to the second exemplary embodiment are the same as those of the first exemplary embodiment, the description thereof will not be provided. 
         [0143]    Since the distribution system  101   a  according to the second exemplary embodiment includes the information processing system  100  having the same configuration as the information processing system  100  of the first exemplary embodiment, the distribution system  101   a  enables to obtain the advantages obtained from the information processing system  100 . That is, the distribution system  101   a  of the second exemplary embodiment enables to improve the efficiency of the sorting operation and to suppress the errors of the sorting operation. 
       Third Exemplary Embodiment 
       [0144]    Hereinafter, a third exemplary embodiment of the present invention will be described. In the description of the third exemplary embodiment, the same constituent elements as those of the information processing system and the distribution system of the first or second exemplary embodiment will be denoted by the same reference numerals, and the redundant description thereof will not be provided. 
         [0145]      FIG. 10  is a diagram representing the information processing system according to the third exemplary embodiment and the distribution system including that information processing system. 
         [0146]    The recognition device  520  that configures the information processing system  100  of the third exemplary embodiment includes the same configuration as that of the first exemplary embodiment. Moreover, the number of installed projectors  600  of the projection device  610  and the number of installed locations thereof are set so that at least a portion of the sorting destination  300  is included in the projection area  630 . Moreover, the number of installed cameras  530  and the number of installed locations thereof are set so that an area including the projection area  630  of the projector  600  can be captured. 
         [0147]    In the third exemplary embodiment, the control device  620  of the projection device  610  recognizes the sorting destination  300  of the sorting object  200  based on the captured image obtained by the camera  530  similarly to the first exemplary embodiment. Moreover, the control device  620  projects the sorting destination projection image  230  representing the sorting destination  300  to the sorting object  200  or the vicinity thereof by controlling the projector  600 . Further, in the third exemplary embodiment, the control device  620  may have a function of projecting the sorting destination projection image  230  to the sorting destination  300  of the sorting object  200  to which the sorting destination projection image  230  is projected by controlling the projector  600 . In this way, the sorting operator  111  can clearly understand the sorting destination  300  of the sorting object  200  and improve the working efficiency. 
         [0148]    The configurations other than the above-described configuration, of the information processing system  100  and the distribution system  101   b  of the third exemplary embodiment are the same as those of the first exemplary embodiment, and the description thereof will not be provided. 
         [0149]    Hereinafter, the flow of processing of the information processing system  100  according to the third exemplary embodiment will be described with reference to  FIG. 11 .  FIG. 11  is a flowchart illustrating the flow of processing of the information processing system  100 . 
         [0150]    First, the control device  550  of the recognition device  520  registers the sorting destinations of sorting destinations  300  in the database  560  and registers (sets up) the positions of the individual roll box pallets  310  of the sorting destinations  300  (step S 201 ). 
         [0151]    After that, the information processing system  100  performs the same processes as steps S 102  to S 107  of the processing of the first exemplary embodiment (steps S 202  to S 207 ). 
         [0152]    After projection of the sorting destination projection image  230  to the sorting object  200  starts, the control device  620  of the projection device  610  determines whether the sorting object  200  is present on the sorting table  400  or in the vicinity thereof based on the captured image obtained by the camera  530  (step S 208 ). Moreover, when the sorting object  200  is present on the sorting table  400  or in the vicinity thereof, the control device  620  continues projecting the sorting destination projection image  230  to the sorting object  200  by repeating the operations subsequent to step S 206 . 
         [0153]    Moreover, for example, when the sorting operator  111  separates the sorting object  200  from the sorting table  400  to move the sorting object  200  to the sorting destination  300 , the sorting object  200  is not present on the sorting table  400  or in the vicinity thereof. In such a case, the projection device  610  stops projecting the sorting destination projection image  230 . Moreover, the projection device  610  projects an image (for example, the sorting destination projection image  230 ) representing the sorting destination  300  of the sorting object  200  to the sorting destination  300  (for example, the roll box pallet  310 ) for a predetermined period (step S 209 ). The projection period is set to a period obtained by adding a margin period to an expected period required for the sorting operator  111  to move the sorting object  200  from the sorting table  400  to the sorting destination  300 , for example. In this way, since the sorting destination projection image  230  is also projected to the sorting destination  300 , for example, the possibility that the sorting operator  111  moves the sorting object  200  from the sorting table  400  to a wrong sorting destination is reduced. 
         [0154]    The sorting destination projection image  230  projected to the sorting destination  300  may be the same as or different from the sorting destination projection image  230  projected to the sorting object  200 . The sorting destination projection image  230  may be one of a name, a code number, a symbol, a figure, a form, a color and the like, for example, which can be easily distinguished, or may be a mixture thereof. Moreover, the sorting destination projection image  230  may be such an image of which the brightness, the tone, and the projection position change with time and may be combined with a moving image. 
         [0155]    The information processing system  100  and the distribution system  101   b  of the third exemplary embodiment includes the information processing system  100  having the same configuration as the information processing system  100  of the first exemplary embodiment. Thus, the information processing system  100  and the distribution system  101   b  enables to improve the efficiency of the sorting operation and decrease the sorting errors similarly to the first exemplary embodiment. 
         [0156]    Further, in the third exemplary embodiment, the control device  620  has a function of projecting the sorting destination projection image  230  to the sorting destination  300  as well as the sorting object  200 . Thus, since the sorting operator  111  can recognize the sorting destination  300  more directly, it is possible to further decrease the sorting errors. 
         [0157]    Moreover, in the third exemplary embodiment, when the sorting operator  111  recognizes the characters and the symbols of a plurality of roll box pallets  310 , it is clear that the roll box pallet  310  at which the light emitted from the projector  600  arrives is the target roll box pallet  310 . Thus, the sorting operator  111  does not need to pay attention to the individual roll box pallets  310 . As a result, incidentally, the fatigue of the sorting operator  111  decreases and the efficiency of the sorting operation is improved. 
       Fourth Exemplary Embodiment 
       [0158]    Hereinafter, a fourth exemplary embodiment of the present invention will be described. In the description of the fourth exemplary embodiment, the same constituent elements as those of the information processing system and the distribution system of the first, the second, or the third exemplary embodiment will be denoted by the same reference numerals, and the redundant description thereof will not be provided. 
         [0159]      FIG. 12  is a diagram representing an information processing system according to the fourth exemplary embodiment and a distribution system including the information processing system. In the fourth exemplary embodiment, the information processing system  100  has a configuration of measuring a three-dimensional shape of the sorting object  200  in addition to the configuration of the first exemplary embodiment. The configuration that measures the three-dimensional shape of the sorting object  200  is included in the recognition device  520 . 
         [0160]    Specifically, the recognition device  520  includes a camera (for example, a camera with depth sensor)  510  capable of measuring the three-dimensional shape of the sorting object  200 . As a method of measuring the three-dimensional shape, a method of obtaining a dimension in a height direction by processing the image of a measurement object (the sorting object  200 ) captured by a camera from a plurality of angles may be used. Moreover, the dimension in the height direction of the sorting object  200  can be acquired by using a combination of a camera and a distance sensor. A plurality of methods may be used as a method of measuring the three-dimensional shape of the sorting object  200 . An appropriate method is selected as the method used in the recognition device  520  by taking the operation mode or the like of the sorting operator  111  into consideration. 
         [0161]    The control device  620  of the projection device  610  adjusts the focusing of the sorting destination projection image  230  to be projected to an upper surface, for example, of the sorting object  200  using the height information of the sorting object  200  acquired by the recognition device  520 . For example, a plurality of projectors  600  of which the focal positions of projection images are different is provided. The control device  620  selects the projector  600  of which the focusing point of the projection image is aligned on the upper surface, for example, of the sorting object  200  among the projectors  600  based on the height information of the sorting object  200 . Moreover, the control device  620  controls the selected projector  600  to project the sorting destination projection image  230 . 
         [0162]    Further, in the fourth exemplary embodiment, a gate  720  that controls the entrance to a recognition area in which the recognition device  520  recognizes the sorting object  200  is provided. The opening of the gate  720  is controlled by the control device  550  by taking the capturing operation of the camera  500  or the like into consideration, for example. 
         [0163]    The configurations other than the above-described configuration in the information processing system  100  of the fourth exemplary embodiment and the distribution system  101   c  including the information processing system  100  are the same as those of the first exemplary embodiment, and the description thereof will not be provided. 
         [0164]    Since the information processing system  100  and the distribution system  101   c  of the fourth exemplary embodiment have the same configurations as those of the information processing system  100  of the first exemplary embodiment, the same advantages as those of the first exemplary embodiment can be obtained. Further, in the fourth exemplary embodiment, the information processing system  100  and the distribution system  101   c  have a configuration capable of measuring the dimension in the height direction of the sorting object  200  and adjusting the focusing of the sorting destination projection image  230  projected to the sorting object  200  based on the height dimension. Thus, the information processing system  100  and the distribution system  101   c  enable to prevent blurring of the sorting destination projection image  230  projected to the upper surface, for example, of the sorting object  200  due to a height fluctuation of the sorting object  200 . That is, the information processing system  100  and the distribution system  101   c  enable to project the sorting destination projection image  230  to the upper surface of the sorting object  200  in a focused state regardless of fluctuation of the height of the sorting object  200 . With this clear sorting destination projection image  230 , the sorting operator  111  can recognize the sorting destination  300  of the sorting object  200  more easily. As a result, the sorting operator  111  can further decrease sorting errors. 
       Fifth Exemplary Embodiment 
       [0165]    Hereinafter, a fifth exemplary embodiment of the present invention will be described. 
         [0166]      FIG. 13  is a block diagram illustrating a simplified configuration of an information processing device according to the fifth exemplary embodiment. The information processing device  10  of the fifth exemplary embodiment includes a display control unit  11 , a first acquisition unit  12 , a second acquisition unit  13  and a third acquisition unit  14 . The first acquisition unit  12  has a function of acquiring a content described in the description associated with a processing object. The second acquisition unit  13  has a function of acquiring a position of the processing object. The third acquisition unit  14  has a function of acquiring rules that are correlated with the content described in the description and the operation content. The display control unit  11  has a function of outputting a signal representing the operation content for the processing object based on the content acquired by the first acquisition unit  12  and the rules acquired by the third acquisition unit  14 . 
         [0167]    The information processing device  10  acquires the content described in the description associated with the processing object, acquires the position of the processing object, and acquires the rules that are correlated with the content described in the description and the operation content. Moreover, the information processing device  10  performs control of displaying the operation content for the processing object based on the acquired content and the acquired rules. Thus, the information processing device  10  enables the operation content for the processing object to be notified clearly. In this way, the information processing device  10  enables the efficiency of operations on the processing object to be improved easily. 
         [0168]    Here, a specific example of the information processing device  10  will be described.  FIG. 14  is a block diagram representing a specific example of the information processing device  10 . In the example of  FIG. 14 , the first acquisition unit  12  is connected to a first camera  50 . The first acquisition unit  12  acquires information (for example, the content described in the description associated with the processing object) including the image (still image or moving image) captured by the first camera  50 . The second acquisition unit  13  is connected to a second camera  53 . The second acquisition unit  13  acquires information (for example, the position of the processing object) including the image (still image or moving image) captured by the second camera  53 . The third acquisition unit  14  is connected directly or indirectly to a storage device  56 . The third acquisition unit  14  acquires the information stored in the storage device  56  directly or indirectly. The display control unit  11  is connected to a display device (not illustrated) that displays information. The display control unit  11  controls the display device based on the information acquired by the acquisition units  12 ,  13 , and  14 . 
         [0169]    The first acquisition unit  12 , the second acquisition unit  13  and the third acquisition unit  14  may be configured as a single acquisition unit. Moreover, this single acquisition unit may communicate (transmit and receive) information with an external device. 
         [0170]    Moreover, comparing the configurations illustrated in  FIG. 14  with the system configurations described in the first to fourth exemplary embodiments, the first camera  50  and the second camera  53  illustrated in  FIG. 14  correspond to the camera  500  and the camera  530  of the first to fourth exemplary embodiments, respectively. The storage device  56  corresponds to the database  560  of the first to fourth exemplary embodiments. The first acquisition unit  12  corresponds to the control device  550  of the first to fourth exemplary embodiments. Moreover, the second acquisition unit  13 , the third acquisition unit  14  and the display control unit  11  correspond to the control device  620  of the first to fourth exemplary embodiments. Further, the device that displays information corresponds to the projector  600 , for example. 
         [0171]    The information processing device  10  may be provided in a wearable terminal, for example. A wearable terminal is a computer that a person can carry with the computer attached to the body thereof. Specifically, the information processing device  10  is incorporated into a glasses-type wearable terminal. This glasses-type wearable terminal is equipped on an operator so that the operation content can be displayed (projected) on the processing object processed by the operator or the vicinity thereof. 
       Sixth Exemplary Embodiment 
       [0172]    Hereinafter, a sixth exemplary embodiment of the present invention will be described. 
         [0173]      FIG. 15  is a diagram representing an information processing system according to the sixth exemplary embodiment. The information processing system  100   d  of the sixth exemplary embodiment includes a first acquisition device  1200 , a second acquisition device  1300 , a third acquisition device  1400  and a display control device  1100 . The first acquisition device  1200  has a function of acquiring the content described in a description associated with a processing object. The second acquisition device  1300  has a function of acquiring a position of the processing object. The third acquisition device  1400  has a function of acquiring rules that are correlated with the content described in the description and the operation content. The display control device  1100  has a function of displaying the operation content for the processing object based on the content acquired by the first acquisition device  1200  and the rules acquired by the third acquisition device  1400 . 
         [0174]    The information processing system  100   d  of the sixth exemplary embodiment enables to improve the operation efficiency similarly to the respective exemplary embodiments. 
         [0175]    In the example of  FIG. 15 , the first to third acquisition devices  1200 ,  1300 , and  1400  and the display control device  1100  are connected via a network  2000 . 
         [0176]    When the information processing system  100   d  of the sixth exemplary embodiment is compared with the information processing systems of the first to fourth exemplary embodiments, the display control device  1100  of the sixth exemplary embodiment corresponds to the control devices  550  and  620  of the first to fourth exemplary embodiments. Moreover, the first acquisition device  1200  of the sixth exemplary embodiment corresponds to the camera  500  of the first to fourth exemplary embodiments. Further, the second acquisition device  1300  of the sixth exemplary embodiment corresponds to the camera  530  and the control device  620  of the first to fourth exemplary embodiments. Further, the third acquisition device  1400  of the sixth exemplary embodiment corresponds to the control device  620  of the first to fourth exemplary embodiments. 
         [0177]    The display control device  1100  of the information processing system  100   d  may be incorporated into a wearable terminal, for example. Examples of the wearable terminal to which the display control device  1100  is incorporated include a glasses-type wearable terminal, an attachment-type (cap-attachment-type) wearable terminal attached to the cap visor, a wrist watch-type wearable terminal, a tablet-type wearable terminal that hangs on the neck, and a garment-type wearable terminal directly attached to a garment. However, the present invention is not limited to this. The respective devices that form the information processing system  100   d  may be different wearable terminals. That is, the information processing system  100   d  may be configured as a plurality of wearable terminal. 
         [0178]    Here, an example of a display control method of the information processing system  100   d  in which respective devices are configured as wearable terminal will be described below. 
         [0179]    When the display control device  1100  of the information processing system  100   d  is incorporated into a tablet-type, a wrist watch-type, or a garment-type wearable terminal, the display control device  1100  displays the operation content to the vicinity of the processing object. The display control device  1100  may display the operation content to a portion (for example, the arm holding the processing object) of the body of the sorting operator. 
         [0180]    When the display control device  1100  of the information processing system  100   d  is incorporated into a cap-attachment type or a glasses-type wearable terminal, the operation content can be displayed in the following manner. For example, a projection plate (for example, a glasses lens) is disposed near the eyes of the sorting operator and the display control device  1100  displays the operation content on the projection plate. In this case, the display control device  1100  controls the display position of the operation content so that the operation content displayed on the glasses lens is visible in the vicinity of the processing object. Moreover, the display control device  1100  may be configured to display the operation content directly in the retina of the eyes of the sorting operator. 
         [0181]    While the present invention has been described with reference to the exemplary embodiments, the present invention is not limited to the above-described exemplary embodiments. Various changes understandable by those skilled in the art may be made to the configuration and details of the present invention within the scope thereof. 
         [0182]    For example, the information processing device according to the present invention may have such a configuration as illustrated in  FIG. 16 . For example, an information processing device  70  illustrated in  FIG. 16  includes an acquisition unit  71 , a detection unit  72 , and a notification control unit  73 . The acquisition unit  71  has a function of acquiring information used for an operation executed on the processing object from a document associated with a processing object. The detection unit  72  has a function of detecting a location of the processing object. The notification control unit  73  has a function of detecting an operation content for the processing object based on the information used for the operation and rules which are data correlated with the operation content which uses the information. Further, the notification control unit  73  has a function of notifying the operation content by controlling the notification device that notifies the operation content. For example, the notification control unit  73  notifies the operation content by projecting an image representing the operation content to the processing object or the vicinity thereof. 
         [0183]    Moreover, in the first to fourth exemplary embodiments, the slip attached to the sorting object  200  is described as an example of the document associated with the processing object. In contrast, the document associated with the processing object is not limited to the slip attached to the sorting object  200  but may be a tag attached to the sorting object  200 , for example. However, since a position and a direction of the tag are likely to change, when information is acquired using an image captured by the camera from the tag as the document associated with the processing object, it is preferable to use the following method in order to acquire the information, for example. For example, the same information may be described on both sides of the tag. Alternatively, an operator performs an operation of adjusting the direction of the tag so that the surface (the surface on which information is described) of the tag is captured by the camera before the tag is captured by the camera. 
         [0184]    This application is based upon and claims the benefit of priority from Japanese patent application No. 2014-067358, filed on Mar. 28, 2014, the disclosure of which is incorporated herein in its entirety by reference. 
         [0185]    Some or all of the exemplary embodiments may be described as the following supplementary notes, but the present invention is not limited to these supplementary notes. 
         [0186]    [Supplementary Note 1] 
         [0187]    An information processing system includes: 
         [0188]    a first acquisition device that acquires a content described in a description associated with a processing object; 
         [0189]    a second acquisition device that acquires a position of the processing object; 
         [0190]    a third acquisition device that acquires rules that are correlated with the content described in the description and an operation content; and 
         [0191]    a display control device that outputs a signal to display the operation content for the processing object based on the content acquired by the first acquisition device and the rules acquired by the third acquisition device. 
         [0192]    [Supplementary Note 2] 
         [0193]    The information processing system according to Supplementary Note 1, further includes: 
         [0194]    a display device that displays the operation content for the processing object to the processing object or the vicinity thereof based on the signal output from the display control device. 
         [0195]    [Supplementary Note 3] 
         [0196]    The information processing system according to Supplementary Note 1 or 2, wherein the operation content is displayed by allowing the processing object to exhibit colors. 
         [0197]    [Supplementary Note 4] 
         [0198]    The information processing system according to Supplementary Note 1, wherein the processing object is visible via a glasses lens, and 
         [0199]    the display control device displays the operation content at a position on the glasses lens corresponding to the position of the processing object or the vicinity thereof. 
         [0200]    [Supplementary Note 5] 
         [0201]    An information processing system includes: 
         [0202]    a first acquisition device that detects a content described in a description associated with a processing object; 
         [0203]    a second acquisition device that detects a position of the processing object; 
         [0204]    a storage device that records the content described in the description and an operation content; and 
         [0205]    a display control device that displays the operation content for the processing object at the position of the processing object or the vicinity thereof based on the content detected by the first acquisition device and the information stored in the storage device. 
         [0206]    [Supplementary Note 6] 
         [0207]    The information processing system according to any one of Supplementary Notes 1 to 5, further includes an image projection device, 
         [0208]    wherein the image projection device projects the operation content for the processing object to the position of the processing object or the vicinity thereof and changes a projection content according to movement of the processing object. 
         [0209]    [Supplementary Note 7] 
         [0210]    The information processing system according to any one of Supplementary Notes 1 to 6, wherein the display control device displays information including a destination of the processing object as the operation content. 
         [0211]    [Supplementary Note 8] 
         [0212]    The information processing system according to Supplementary Note 7, wherein the display control device displays a direction determined based on a relative position of the processing object in relation to the destination. 
         [0213]    [Supplementary Note 9] 
         [0214]    The information processing system according to any one of Supplementary Notes 1 to 8, wherein the display control device displays a direction determined based on the processing object and an operation position and an operation state of an operator who performs the operation content. 
         [0215]    [Supplementary Note 10] 
         [0216]    The information processing system according to any one of Supplementary Notes 1 to 9, wherein the display control device displays an attribute of the processing object. 
         [0217]    [Supplementary Note 11] 
         [0218]    The information processing system according to any one of Supplementary Notes 1 to 10, further includes a moving device that moves the processing object, 
         [0219]    wherein the moving device is controlled based on one or both of the position and the number of the processing objects obtained by the second acquisition device. 
         [0220]    [Supplementary Note 12] 
         [0221]    The information processing system according to any one of Supplementary Notes 7 to 11, wherein the display control device displays information based on the content of the description at the position of the processing object or the vicinity thereof and the destination of the processing object. 
         [0222]    [Supplementary Note 13] 
         [0223]    The information processing system according to any one of Supplementary Notes 7 to 12, wherein the display control device stops displaying information on the destination of the processing object at a time point at which the position cannot be acquired by the second acquisition device or when a predetermined period has elapsed from the time point. 
         [0224]    [Supplementary Note 14] 
         [0225]    The information processing system according to any one of Supplementary Notes 1 to 13, further includes a fourth acquisition device that detects a shape of the processing object, 
         [0226]    wherein the display control device displays the information based on the description at the position of the processing object or the vicinity thereof according to the position and the shape of the processing object. 
         [0227]    [Supplementary Note 15] 
         [0228]    An information processing device includes: 
         [0229]    a first acquisition unit that acquires a content described in a description associated with a processing object; 
         [0230]    a second acquisition unit that acquires a position of the processing object; 
         [0231]    a third acquisition unit that acquires rules that are correlated with the content described in the description and an operation content; and 
         [0232]    a display control unit that outputs a signal to display the operation content for the processing object based on the content acquired by the first acquisition unit and the rules acquired by the third acquisition unit. 
         [0233]    [Supplementary Note 16] 
         [0234]    An information processing method includes: 
         [0235]    acquiring a content described in a description associated with a processing object; 
         [0236]    acquiring a position of the processing object; 
         [0237]    acquiring rules that are correlated with the content described in the description and an operation content; and 
         [0238]    outputting a signal to display the operation content for the processing object based on the acquired content of the description and the rules. 
         [0239]    [Supplementary Note 17] 
         [0240]    A computer program for causing a computer to execute: 
         [0241]    a process of acquiring a content described in a description associated with a processing object; 
         [0242]    a process of acquiring a position of the processing object; 
         [0243]    a process of acquiring rules that are correlated with the content described in the description and an operation content; and 
         [0244]    a process of outputting a signal to display the operation content for the processing object based on the acquired content of the description and the rules. 
       REFERENCE SIGNS LIST 
       [0000]    
       
         
           
               100 : Information processing system 
               101 ,  101   a ,  101   b ,  101   c : Distribution system 
               200 : Sorting object 
               210 : Destination label 
               230 : Sorting destination projection image 
               500 ,  530 : Camera 
               520 : Recognition device 
               550 ,  620 : Control device 
               560 : Database 
               600 : Projector 
               610 : Projection device 
               700 : Conveying device