Abstract:
A display control device includes: an accepting unit that accepts part-designation information for designating plural parts to be printed included in data and processing-designation information for designating print processing that performs predetermined processing on every K parts of the plural parts, where K is an integer not less than 2; a generating unit that generates plural specific images for specifying contents of the plural respective parts designated by part-designation information accepted by the accepting unit; and a controller that, when the accepting unit accepts the processing-designation information, exerts control so that a process for performing an operation to select K specific images from the plural specific images generated by the generating unit and to change a state of the K specific images in accordance with the predetermined process in order while changing the K specific images to be selected is displayed on a display screen.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is based on and claims priority under 35 USC §119 from Japanese Patent Application No. 2012-067829 filed Mar. 23, 2012. 
       BACKGROUND 
       [0002]    1. Technical Field 
         [0003]    The present invention relates to a display control device, a printing apparatus, a display control method and a non-transitory computer readable medium storing a program. 
         [0004]    2. Related Art 
         [0005]    Recently, many techniques have been proposed in which preview display is provided for various settings or states in print processing. 
       SUMMARY 
       [0006]    According to an aspect of the present invention, there is provided a display control device including: an accepting unit that accepts part-designation information for designating plural parts to be printed included in data and processing-designation information for designating print processing that performs predetermined processing on every K parts of the plural parts, where K is an integer not less than 2; a generating unit that generates plural specific images for specifying contents of the plural respective parts designated by the part-designation information accepted by the accepting unit; and a controller that, when the accepting unit accepts the processing-designation information, exerts control so that a process for performing an operation to select K specific images from the plural specific images generated by the generating unit and to change a state of the K specific images in accordance with the predetermined processing in order while changing the K specific images to be selected is displayed on a display screen. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0007]    An exemplary embodiment of the present invention will be described in detail based on the following figures, wherein: 
           [0008]      FIG. 1  is a diagram showing an example of a configuration of an image processing device to which the exemplary embodiment according to the present invention is applied; 
           [0009]      FIGS. 2A to 2F  are diagrams showing examples of display of thumbnail images in the case where duplex print (long side binding) is designated; 
           [0010]      FIGS. 3A to 3F  are diagrams showing examples of display of thumbnail images in the case where 2-page aggregate print is designated; 
           [0011]      FIGS. 4A to 4D  are diagrams showing examples of display of thumbnail images in the case where the duplex print (long side binding) is designated after the 2-page aggregate print is designated; 
           [0012]      FIGS. 5A to 5C  are diagrams showing examples of display of thumbnail images in the case where the 2-page aggregate print is designated after the duplex print (long side binding) is designated; 
           [0013]      FIGS. 6A to 6H  are diagrams showing examples of display of thumbnail images in the case where saddle-stitch bookbinding is designated; 
           [0014]      FIG. 7  is a block diagram showing an example of a functional configuration of the image processing device in the exemplary embodiment according to the present invention; 
           [0015]      FIG. 8  is a flowchart showing an example of operations of the image processing device in the case where the duplex print is designated as print processing; 
           [0016]      FIG. 9  is a flowchart showing an example of an operation of the image processing device in the case where the 2-page aggregate print is designated as print processing; and 
           [0017]      FIG. 10  is a diagram showing an example of a hardware configuration of a terminal device to which the exemplary embodiment according to the present invention is applied. 
       
    
    
     DETAILED DESCRIPTION 
       [0018]    Hereinafter, an exemplary embodiment according to the present invention will be described in detail with reference to the attached drawings. 
         [0019]      FIG. 1  is a diagram showing an example of a hardware configuration of an image processing device  10  to which the exemplary embodiment is applied. 
         [0020]    As shown in the figure, the image processing device  10  includes: a central processing unit (CPU)  11 ; a random access memory (RAM)  12 ; a read only memory (ROM)  13 ; a hard disk drive (HDD)  14 ; an operation panel  15 ; an image capturing unit  16 ; an image forming unit  17 ; and a communication interface (hereinafter, referred to as “communication I/F”)  18 . 
         [0021]    The CPU  11  loads various programs stored in the ROM  13  and the like into the RAM  12 , and then executes the programs, thereby to implement functions to be described later. 
         [0022]    The RAM  12  is a memory that is used as a working memory or the like for the CPU  11 . 
         [0023]    The ROM  13  is a memory that stores, therein, the various programs executed by the CPU  11 . 
         [0024]    The HDD  14  is, for example, a magnetic disk device that stores, therein, image data captured by the image capturing unit  16 , image data used for image formation in the image forming unit  17 , and the like. 
         [0025]    The operation panel  15  is, for example, a touch panel that displays various kinds of information and accepts an operation input by a user. In the exemplary embodiment, the operation panel  15  is provided as an example of a display screen, or as an example of a display unit. 
         [0026]    The image capturing unit  16  captures an image recorded on a recording medium such as paper. The image capturing unit  16  herein is, for example, a scanner. The scanner to be used may employ one of the following two systems: a CCD system in which reflected light of light emitted from a light source and directed at an original is reduced by a lens and is then received by charge coupled devices (CCD); and a CIS system in which reflected light of light beams sequentially emitted from LED light sources and directed at an original is received by a contact image sensor (CIS). 
         [0027]    The image forming unit  17  forms an image on a recording medium. The image forming unit  17  herein is, for example, a printer. The printer to be used may employ one of the following two systems: an electrophotographic system in which an image is formed by transferring toner attached to a photoconductive drum onto a recording medium; and an ink jet system in which an image is formed by ejecting ink onto a recording medium. In the exemplary embodiment, the image forming unit  17  is provided as an example of a printing unit. 
         [0028]    The communication I/F  18  transmits and accepts various kinds of information to and from other devices through a network. 
         [0029]    In such an image processing device  10 , there are some cases where processing such as duplex print, aggregate print, saddle-stitch bookbinding and combination thereof is designated when instructions for printing of electronic documents are provided from the operation panel  15 . Here, “aggregate print” refers to printing of an aggregate of images of plural pages of the electronic document onto one sheet, and in the present specification, aggregate print in which an aggregate of images of N pages of the electronic document is printed on one sheet is especially referred to as “N-page aggregate print”. 
         [0030]    In the case where the electronic document is printed while designating various kinds of processing in this manner, it is conceivable to display a preview image that indicates a resulting finished state on the operation panel  15 . 
         [0031]    However, there is a possibility of causing a misprint since it is difficult to straightforwardly understand the finished state only from this display. 
         [0032]    Accordingly, in the exemplary embodiment, in displaying the finished state on the operation panel  15 , processes leading to the finished state are displayed by animation. 
         [0033]    However, a display method of the processes leading to the finished state is different depending on the designated processing. 
         [0034]    For example, in the case where the duplex print is designated in printing an electronic document, animation display is performed in which a thumbnail image of a page of the electronic document (hereinafter, referred to as “document image”) is attached to a thumbnail image of a page of a sheet (hereinafter, referred to as “sheet image”), and with this state, one sheet image is formed by putting two sheet images together, one of which is on a front side and the other one is on a backside. 
         [0035]    Further, in the case where the 2-page aggregate print is designated in printing an electronic document, animation display is performed in which two document images are attached to one sheet image. 
         [0036]    On the other hand, in displaying the processes leading to the finished state by animation, if all the thumbnail images are displayed in the case where the number of thumbnail images to be displayed on the operation panel  15  is large, there occurs a problem that the more processing time is required, and thereby efficiency is contrarily deteriorated. 
         [0037]    Therefore, in the exemplary embodiment, in the case where the number of thumbnail images to be displayed on the operation panel  15  is large, an intermediate portion sandwiched between an initial portion and a last portion is omitted or made to have a shorter display time. It should be noted that the user may determine whether to carry out such display control on the intermediate portion. 
         [0038]    First, a description will be given to examples of display of the thumbnail images in the exemplary embodiment. It should be noted that, in the following display examples, the number of pages to be printed of the electronic document is seven, and all of them are placed in a portrait orientation. 
         [0039]      FIGS. 2A to 2F  are diagrams showing the display examples of thumbnail images in the case where duplex print (long side binding) is designated. 
         [0040]    In an initial state, as shown in  FIG. 2A , there are seven document images. It should be noted that the number assigned to each document image indicates the page number of the electronic document, but does not mean that such number is included in each document image. 
         [0041]    Here, when instructions of duplex print are accepted, it is determined that there is no instruction of aggregate print, and these document images are switched into the same number of sheet images each of which contains one document image. However, in the figure, the document images and the sheet images are shown without distinction. Then, as shown in  FIG. 2B , of the seven sheet images, the backside of the first sheet image and the backside of the second sheet image approach and attract each other. 
         [0042]    Consequently, as shown in  FIG. 2C , the first sheet image and the second sheet image form one sheet image having document images on both sides thereof. The third sheet image and the fourth sheet image have the same behavior as the first sheet image and the second sheet image in  FIG. 2B  while moving over to the left as indicated by the hollow arrow. 
         [0043]    Thereafter, as shown in  FIG. 2D , the sheet image formed by adding the first sheet image and the second sheet image is returned to a flat state, and from then on, two of the sheet images approach and repeat the same behavior throughout. 
         [0044]    Accordingly, as shown in  FIG. 2E , the seven sheet images are organized into four sheet images and properly aligned. 
         [0045]    Ultimately, an image is displayed in which the four sheet images are bundled as shown in  FIG. 2F . 
         [0046]      FIGS. 3A to 3F  are diagrams showing the display examples of thumbnail images in the case where 2-page aggregate print is designated. 
         [0047]    In an initial state, as shown in  FIG. 3A , there are seven document images. It should be noted that the number assigned to each document image indicates the page number of the electronic document, but does not mean that such number is included in each document image. 
         [0048]    Here, when instructions of 2-page aggregate print are accepted, of the seven document images, the first document image and the second document image approach each other and are reduced as shown in  FIG. 3B . 
         [0049]    Thereafter, as shown in  FIG. 3C , the third document image and the fourth document image as well as the fifth document image and the sixth document image have the same behavior as the first document image and the second document image in  FIG. 3B , and the document images are aligned two by two with spacing. 
         [0050]    Further, as shown in  FIG. 3D , the last document image is moved over to the left. 
         [0051]    Thereafter, as shown in  FIG. 3E , a sheet image appears outside of each pair of aligned document images, to thereby represent that document images of two pages are contained in one sheet. 
         [0052]    Ultimately, an image is displayed in which the four sheet images are bundled as shown in  FIG. 3F . 
         [0053]      FIGS. 4A to 4D  are diagrams showing display examples of thumbnail images in the case where the duplex print (long side binding) is designated after the 2-page aggregate print is designated. 
         [0054]    Until the sheet images are aligned under the instructions of the 2-page aggregate print, display is carried out as shown in  FIGS. 3A to 3E . 
         [0055]    Here, upon accepting additional instructions of the duplex print, the second sheet image is rotated in the vertical direction and reversed as shown in  FIG. 4A . 
         [0056]    Then, as shown in  FIG. 4B , the second sheet image slides into the backside of the first sheet image, and the fourth sheet image is rotated in the vertical direction and reversed. 
         [0057]    Thereafter, as shown in  FIG. 4C , the first sheet image and the second sheet image form one sheet image having document images on both sides thereof. The fourth sheet image also has the same behavior as the second sheet image in  FIG. 4B . 
         [0058]    Ultimately, as shown in  FIG. 4D , an image is displayed in which four sheet images are bundled. 
         [0059]      FIGS. 5A to 5C  are diagrams showing display examples of thumbnail images in the case where the 2-page aggregate print is designated after the duplex print (long side binding) is designated. 
         [0060]    Until the sheet images are aligned under the instructions of the duplex print, display is carried out as shown in  FIGS. 2A to 2E . 
         [0061]    Here, upon accepting additional instructions of the 2-page aggregate print, the first document image and the second document image attached to both sides of the first sheet image are separated as shown in  FIG. 5A . 
         [0062]    Further, as shown in  FIG. 5B , the first document image and the second document image are aligned as simplex document images, and the second sheet image also has the same behavior as the first sheet image in  FIG. 5B . 
         [0063]    Thereafter, as shown in  FIG. 5C , the same behavior is repeated in all of the sheet images. In the state where the seven document images are aligned, a sheet image appears outside of each pair of aligned document images, to be returned to the state where the sheet images are aligned under the instructions of the 2-page aggregate print right from the start. 
         [0064]    Then, from then on, display is carried out as shown in  FIGS. 4A to 4D . 
         [0065]    That is to say, in the case where multiple sequential processes are performed with regarding designation of the duplex print after designation of the 2-page aggregate print as a forward order and regarding designation of the 2-page aggregate print after designation of the duplex print as a reverse order, the display is once returned to the state where the processes can be executed in the forward order. 
         [0066]      FIGS. 6A to 6H  are diagrams showing display examples of thumbnail images in the case where saddle-stitch bookbinding is designated. 
         [0067]    In an initial state, as shown in  FIG. 6A , there are seven document images. It should be noted that the number assigned to each document image indicates the page number of the electronic document, but does not mean that such number is included in each document image. 
         [0068]    Here, upon accepting instructions of the saddle-stitch bookbinding, after the display in  FIGS. 3A to 3D , the seven document images are aligned two by two with spacing as shown in  FIG. 6B . 
         [0069]    Thereafter, as shown in  FIG. 6C , the seven document images move positions such that pages are aligned when bookbinding is performed. It should be noted that, in this specific example, since the last page becomes blank when bookbinding is completed, a blank document image is inserted as the first document image. 
         [0070]    Further, as shown in  FIG. 6D , a sheet image appears outside of each pair of aligned document images, to thereby represent that document images of two pages are contained in one sheet. 
         [0071]    Thereafter, as shown in  FIG. 6E , of the four sheet images, the first sheet image and the second sheet image are attracted each other while being folded. 
         [0072]    Consequently, as shown in  FIG. 6F , the first sheet image and the second sheet image form one sheet image having document images on both sides thereof, and then the third sheet image and the fourth sheet image have the same behavior as the first sheet image and the second sheet image in  FIG. 6E  to result in two sheet images. 
         [0073]    Thereafter, as shown in  FIG. 6G , the state of laying the two sheet images and stapling the center thereof is displayed. 
         [0074]    Ultimately, as shown in  FIG. 6H , animation display in which pages are turned, though an operation of turning the pages one by one is not executed, is performed. 
         [0075]    Next, the image processing device  10  that realizes operations as outlined above will be described in detail. 
         [0076]      FIG. 7  is a block diagram showing an example of a functional configuration of the image processing device  10 . 
         [0077]    As shown in the figure, the image processing device  10  includes: an electronic document storing unit  21 ; an operation accepting unit  22 ; a thumbnail image generating unit  23 ; a thumbnail image storing unit  24 ; a frame generating unit  25 ; a frame storing unit  26 ; a display controller  27  and a print data outputting unit  29 . 
         [0078]    The electronic document storing unit  21  stores the electronic document to be printed. Here, the electronic document to be printed refers to, for example, an electronic document reconstructed based on PDL (page description language) data transmitted from a not-shown PC (personal computer), a PDF file transmitted from a not-shown PC through a PDF direct printing function, and an electronic document captured from a not-shown server computer or mobile terminal. However, “electronic document” in the present specification is not only limited to “document” including texts and subjected to electronization. For example, it is assumed that graphic data such as graphics, and image data such as paintings and photographs are included in “electronic document” regardless of whether it is raster data or vector data. In the exemplary embodiment, the electronic document is used as an example of data. 
         [0079]    When an operation is performed on the operation panel  15  by a user, the operation accepting unit  22  accepts information based on the user&#39;s operation. For example, if an operation for designating pages to be printed of the electronic document is performed as the user&#39;s operation, the page numbers of the designated pages are accepted. Moreover, if an operation for designating print processing (such as the duplex print or the aggregate print) is performed, designation of the print processing (such as the duplex print or the aggregate print) is accepted. Further, operation of requesting printing of the designated pages is performed, a printing request indicating to make a request for printing is accepted. In the exemplary embodiment, a page is used as an example of a part, a page number is used as an example of part-designation information, designation of the print processing is used as an example of processing-designation information that designates print processing, duplex-print designation is also used as an example of processing-designation information that designates duplex-print processing, aggregate-print designation is used as another example of processing-designation information that designates aggregate-print processing, and the operation accepting unit  22  is provided as an example of an accepting unit that accepts the part-designation information and the processing-designation information. Further, the printing request is used as an example of printing request information, and the operation accepting unit  22  is provided as an example of an accepting unit that accepts the part-designation information, the processing-designation information and the printing request information. 
         [0080]    The thumbnail image generating unit  23  retains pages, of the pages of the electronic document stored in the electronic document storing unit  21 , corresponding to the page numbers accepted by the operation accepting unit  22 , and generates thumbnail images by reducing those pages. Moreover, when the operation accepting unit  22  accepts the designation of the print processing (such as the duplex print or the aggregate print), the thumbnail image generating unit  23  also retains pages for printing which are generated by performing a layout on the retained pages in accordance with the designation of the processing in printing. In the exemplary embodiment, the thumbnail image is used as an example of a specific image, and the thumbnail image generating unit  23  is provided as an example of a generating unit that generates the specific image. 
         [0081]    The thumbnail image storing unit  24  stores the thumbnail images generated by the thumbnail image generating unit  23 . 
         [0082]    By use of the thumbnail images stored in the thumbnail image storing unit  24 , the frame generating unit  25  generates: a frame of an initial image for displaying the initial image; frames for animation display of the processes in print processing; a frame of aligned images for displaying the images aligned after being subjected to the print processing; and a frame of a finished image for displaying the finished image in which the aligned images are finished as a completed one. 
         [0083]    The frame storing unit  26  stores the frame for animation display of the processes in print processing, the frame for the aligned images and the frame of the finished image, which have been generated by the frame generating unit  25 . 
         [0084]    The display controller  27  exerts control on the frame of the initial image generated by the frame generating unit  25  to be displayed on the operation panel  15 , and thereafter, sequentially takes the frames out of the frame storing unit  26  that stores thereof, and exerts control on these frames to be sequentially displayed on the operation panel  15 . In the exemplary embodiment, the display controller  27  is provided as an example of a controller that exerts control to display the processes on the display screen. 
         [0085]    The print data outputting unit  29  outputs data for printing the pages for printing retained in the thumbnail image generating unit  23  to the image forming unit  17 . 
         [0086]    It should be noted that these functional units are implemented by cooperation of software and hardware resources. Specifically, the CPU  11  reads the programs for implementing the operation accepting unit  22 , the thumbnail generating unit  23 , the frame generating unit  25 , the display controller  27  and the print data outputting unit  29  from the HDD  14  into the RAM  12 , and executes thereof to thereby implement these functional units. In addition, the electronic document storing unit  21 , the thumbnail image storing unit  24  and the frame storing unit  26  are implemented by, for example, the HDD  14 . 
         [0087]    Next, operations of the image processing device  10  will be described. 
         [0088]      FIG. 8  is a flowchart showing an example of operations of the image processing device  10  in the case where the duplex print is designated as the print processing. It should be noted that the example of operations corresponds to the display examples shown in  FIGS. 2A to 2F . 
         [0089]    The operations of the flowchart are started by designation of pages to be printed of an electronic document on the operation panel  15  by a user. 
         [0090]    When the operations are started, in the image processing device  10 , the operation accepting unit  22  accepts the page numbers of the pages to be printed of the electronic document (step  201 ). 
         [0091]    Then, the thumbnail image generating unit  23  generates thumbnail images of the pages corresponding to the page numbers accepted in step  201  from among the pages of the electronic document stored in the electronic document storing unit  21  (step  202 ). It should be noted that, at this time, the thumbnail image generating unit  23  stores a copy of the pages before generation of the thumbnail images in a memory of its own. The thumbnail images having been generated are stored in the thumbnail image storing unit  24 . 
         [0092]    Next, the frame generating unit  25  generates a frame of an initial image by use of the thumbnail images stored in the thumbnail image storing unit  24 , and the display controller  27  exerts control on the display of this frame, and thereby the frame of the initial image is displayed on the operation panel  15  (step  203 ). It should be noted that the frame generated here is the frame shown in  FIG. 2A  in the specific examples of  FIGS. 2A to 2F . 
         [0093]    When the frame of the initial image is displayed on the operation panel  15 , the user checks the display and performs an operation to designate processing such as the duplex print and the aggregate print on the operation panel  15 . Here, it is assumed that an operation to designate the processing of the duplex print is performed. Then, in the image processing device  10 , the operation accepting unit  22  accepts the designation of the duplex print (step  204 ). 
         [0094]    This causes the frame generating unit  25  to start processing of generation of a frame for animation display of the processes in the duplex print processing. 
         [0095]    When the processing is started, first, the frame generating unit  25  substitutes the number of the pages to be printed into a variable N (step  205 ). 
         [0096]    Next, the frame generating unit  25  substitutes 1 into a variable i to count the number of sheet images (step  206 ), and repeats the process to generate a frame for the variable i while performing addition to the variable i by twos. 
         [0097]    Here, the processing to generate a frame for the variable i is as follows. 
         [0098]    First, frame (i−N/2) is substituted into a variable F (i) that represents the number of frames with respect to the variable i (step  207 ). Then, F (i) frames constituting animation, which indicates the state of putting the backside of the i-th sheet image and the backside of the (i+1)-th sheet image together, are generated (step  208 ). It should be noted that the frames generated here are: the frames shown in  FIG. 2B  when the variable i is 1; the frames shown in  FIG. 2C  when the variable i is 3; and the frames shown in  FIG. 2D  when the variable i is 5, among the specific examples shown in  FIGS. 2A to 2F . In  FIGS. 2B to 2D , only one state is shown with respect to a single value of the variable i; however, actually, frames corresponding to several states with respect to the single value of the variable i are generated. For example, when the variable i is 1, other than the frame indicating the state shown in  FIG. 2B , frames corresponding to the states of plural time points, which start from a time point where the first sheet image and the second sheet image begin to approach to a time point where the sheet images are completely overlaid, are generated. 
         [0099]    In this manner, several frames are generated with respect to the variable i, and the number thereof is provided as F (i) as described above. If it is assumed that a speed of putting the sheet images together is the same for all the values of the variable i, F (i) may be a fixed value irrespective of the value of the variable i; however, in the exemplary embodiment, F (i) is set as a function value of frame (i−N/2) with a degree of separation from the center page as a parameter to make a difference in the speed of putting the sheet images together between the both end portions and the intermediate portion. Here, if the purpose is to simply make a difference in the speed of putting the sheet images together between the both end portions and the intermediate portion, frame (x) may be any function except for a function having a fixed value. On the other hand, in the case where the purpose is to respond to a request of carefully observing the state of putting the sheet images together in the both end portions, though there is no need to carefully observe the state of putting the sheet images together in the intermediate portion, frame (x) may be a monotonically non-decreasing function where frame (x 1 )≦frame (x 2 ) holds for x 1 &lt;x 2 . For example, setting frame (x) to be a monotonically non-decreasing function includes that the number of frames with respect to the variable i is provided as F 1  for same percentage of the sheet images in the both end portions, while the number of frames with respect to the variable i is provided as F 2 , which is extremely smaller than F 1 , for the sheet images sandwiched between the sheet images in both end portions. 
         [0100]    It should be noted that the frames generated here are stored in the frame storing unit  26 . On that occasion, it is assumed that several frames generated with respect to the variable i are stored in the order of time when the states represented by the frames occur. 
         [0101]    Thereafter, the frame generating unit  25  adds 2 to the variable i (step  209 ), and determines whether or not the value obtained by adding 1 to the variable i becomes larger than the value of the variable N (step  210 ). As a result, if it is determined that the value obtained by adding 1 to the variable i is not larger than the value of the variable N, the process returns to step  207 . On the other hand, if it is determined that the value obtained by adding 1 to the variable i is larger than the value of the variable N, the process proceeds to step  211 . 
         [0102]    To be described in more detail, in the case where the value of the variable N is an odd number, the processes of steps  207  to  209  are performed up to i=N−2; however, when it comes to i=N, the process proceeds to step  211 . Further, in the case where the value of the variable N is an even number, the processes of steps  207  to  209  are performed up to i=N−1; however, when it comes to i=N+1, the process proceeds to step  211 . For example, since N=7 in  FIGS. 2A to 2F , the processes of steps  207  to  209  are performed up to the fifth sheet image and the sixth sheet image; however, when it comes to the seventh sheet image, the process proceeds to step  211  without performing the processes of steps  207  to  209 . 
         [0103]    Then, the frame generating unit  25  generates a frame for aligned images in which sheet images obtained by putting two sheet images together in step  208  are aligned (step  211 ). However, if the value of the variable N is an odd number, the last sheet image is included in the frame of aligned images as it is. It should be noted that the frame generated here is the frame shown in  FIG. 2E  in the specific examples of  FIGS. 2A to 2F . Further, the generated frame is stored in the frame storing unit  26 . 
         [0104]    Thereafter, the frame generating unit  25  generates a frame of a finished image in which sheet images aligned in step  211  are bundled (step  212 ). It should be noted that the frame generated here is the frame show in  FIG. 2F  in the specific examples of  FIGS. 2A to 2F . Further, the generated frame is stored in the frame storing unit  26 . 
         [0105]    When various kinds of frames are stored in the frame storing unit  26  in this way, the display controller  27  reads the frames from the frame storing unit  26  in the order of being stored, and exerts control on the display of these frames, and thereby the processes in the duplex print processing are displayed on the operation panel  15  (step  213 ). On that occasion, the display controller  27  sets the same time for displaying each frame, to thereby slow the operation in a page where many frames are generated, while accelerate the operation in a page where generated frames are small in number. 
         [0106]    It should be noted that, at this time, the thumbnail image generating unit  23  performs layout conversion based on the designation of the duplex print accepted in step  204  on the copy of the pages stored in the memory of its own. 
         [0107]    When the processes of the duplex print processing are displayed on the operation panel  15  in this manner, the user checks the display and performs an operation to make a request for the duplex print of the designated pages on the operation panel  15 . Then, in the image processing device  10 , the operation accepting unit  22  accepts the request for printing, and the print data outputting unit  29  outputs the print data, which is based on the pages subjected to the layout conversion and stored in the memory of the thumbnail image generating unit  23 , to the image forming unit  17 . 
         [0108]    It should be noted that, in this operation example, the number of frames with respect to the variable i is determined in step  207  and the frames of the determined number are formed in step  208  for controlling the speed of animation display of the processes in the duplex print processing; however, the operation is not limited thereto. For example, it may be allowed to determine the display time per one frame with respect to the variable i in step  207 , generate the same number of frames irrespective of the variable i in step  208  and store the frames to be associated with the determined display time, and thereby to display each frame for the display time associated therewith. Further, with more generalization, a method may be employed such that the speed of the animation display per each value of the variable i becomes the speed responding to the value of the variable i. Here, the value of the variable i is an example of the order of selecting the specific image. 
         [0109]      FIG. 9  is a flowchart showing an example of operations of the image processing device  10  in the case where the 2-page aggregate print is designated as the print processing. It should be noted that the example of operations corresponds to the display examples shown in  FIGS. 3A to 3F . However, a description herein will be given on the assumption that, when the two document images are brought near to each other and are reduced as shown in  FIGS. 3B and 3C , imposition on the sheet images shown in  FIG. 3E  is also performed. 
         [0110]    The operations of the flowchart are started by designation of pages to be printed of an electronic document on the operation panel  15  by a user. 
         [0111]    When the operations are started, in the image processing device  10 , the operation accepting unit  22  accepts the page numbers of the pages to be printed of the electronic document (step  251 ). 
         [0112]    Then, the thumbnail image generating unit  23  generates thumbnail images of the pages corresponding to the page numbers accepted in step  251  from among the pages of the electronic document stored in the electronic document storing unit  21  (step  252 ). It should be noted that, at this time, the thumbnail image generating unit  23  stores a copy of the pages before generation of the thumbnail images in a memory of its own. The thumbnail images having been generated are stored in the thumbnail image storing unit  24 . 
         [0113]    Next, the frame generating unit  25  generates a frame of an initial image by use of the thumbnail images stored in the thumbnail image storing unit  24 , and the display controller  27  exerts control on the display of this frame, and thereby the frame of the initial image is displayed on the operation panel  15  (step  253 ). It should be noted that the frame generated here is the frame shown in  FIG. 3A  in the specific examples of  FIGS. 3A to 3F . 
         [0114]    When the frame of the initial image is displayed on the operation panel  15 , the user checks the display and performs an operation to designate processing such as the duplex print and the aggregate print on the operation panel  15 . Here, it is assumed that an operation to designate the processing of the 2-page aggregate print is performed. Then, in the image processing device  10 , the operation accepting unit  22  accepts the designation of the 2-page aggregate print (step  254 ). 
         [0115]    This causes the frame generating unit  25  to start processing of generation of frames for animation display of the processes in the 2-page aggregate print processing. 
         [0116]    When the processing is started, first, the frame generating unit  25  substitutes the number of the pages to be printed into a variable N (step  255 ). 
         [0117]    Next, the frame generating unit  25  substitutes 1 into a variable i to count the number of sheet images (step  256 ), and repeats the process to generate a frame for the variable i while performing addition to the variable i by twos. 
         [0118]    Here, the process to generate a frame for the variable i is as follows. 
         [0119]    First, frame (i−N/2) is substituted into a variable F (i) that represents the number of frames with respect to the variable i (step  257 ). Then, F (i) frames constituting animation, which indicates the state where the i-th sheet image and the (i+1)-th sheet image are brought near to each other and are reduced to be imposed on one sheet image, are generated (step  258 ). It should be noted that the frames generated here are: when the variable i is 1, the frames indicating the state where the two document images, which have been brought near to each other and reduced in  FIG. 3B , are imposed on one sheet image; and when the variable i is 5, the frames indicating the state where the two document images, which have been brought near to each other and reduced in  FIG. 3C , are imposed on one sheet image, among the specific examples shown in  FIGS. 3A to 3F . In  FIGS. 3B and 3C , only one state is shown with respect to a single value of the variable i; however, actually, frames corresponding to several states with respect to the single value of the variable i are generated. For example, when the variable i is 1, frames corresponding to the states of plural time points, which start from a time point where the first sheet image and the second sheet image begin to approach to a time point where imposition on the sheet image is performed, are generated. 
         [0120]    In this manner, several frames are generated with respect to the variable i, and the number thereof is provided as F (i) as described above. It should be noted that, since the description has already been given to F (i) and the function value frame (i−N/2) substituted thereto with reference to  FIG. 8 , the description here is omitted. 
         [0121]    It should be noted that the frames generated here are stored in the frame storing unit  26 . On that occasion, it is assumed that several frames generated with respect to the variable i are stored in the order of time when the states represented by the frames occur. 
         [0122]    Thereafter, the frame generating unit  25  adds 2 to the variable i (step  259 ), and determines whether or not the value obtained by adding 1 to the variable i becomes larger than the value of the variable N (step  260 ). As a result, if it is determined that the value obtained by adding 1 to the variable i is not larger than the value of the variable N, the process returns to step  257 . On the other hand, if it is determined that the value obtained by adding 1 to the variable i is larger than the value of the variable N, the process proceeds to step  261 . 
         [0123]    To be described in more detail, in the case where the value of the variable N is an odd number, the processes of steps  257  to  259  are performed up to i=N−2; however, when it comes to i=N, the process proceeds to step  261 . Further, in the case where the value of the variable N is an even number, the processes of steps  257  to  259  are performed up to i=N−1; however, when it comes to i=N+1, the process proceeds to step  261 . For example, since N=7 in  FIGS. 3A to 3F , the processes of steps  257  to  259  are performed up to the fifth sheet image and the sixth sheet image; however, when it comes to the seventh sheet image, the process proceeds to step  261  without performing the processes of steps  257  to  259 . 
         [0124]    Then, the frame generating unit  25  generates a frame of aligned images in which sheet images having document images imposed thereon in step  258  are aligned (step  261 ). However, if the value of the variable N is an odd number, the last sheet image is reduced and imposed on the left half of a sheet image to be included in the frame of aligned images. It should be noted that the frame generated here is the frame shown in  FIG. 3E  in the examples of  FIGS. 3A to 3F . Further, the generated frame is stored in the frame storing unit  26 . 
         [0125]    Thereafter, the frame generating unit  25  generates a frame of a finished image in which sheet images aligned in step  261  are bundled (step  262 ). It should be noted that the frame generated here is the frame shown in  FIG. 3F  in the specific examples of  FIGS. 3A to 3F . Further, the generated frame is stored in the frame storing unit  26 . 
         [0126]    When various kinds of frames are stored in the frame storing unit  26  in this way, the display controller  27  reads the frames from the frame storing unit  26  in the order of being stored, and exerts control on the display of these frames, and thereby the processes in the 2-page aggregate print processing are displayed on the operation panel  15  (step  263 ). On that occasion, the display controller  27  sets the same time for displaying each frame, to thereby slow the operation in a page where many frames are generated, while accelerating the operation in a page where generated frames are small in number. 
         [0127]    It should be noted that, at this time, the thumbnail image generating unit  23  performs layout conversion based on the designation of the 2-page aggregate print accepted in step  254  on the copy of the pages stored in the memory of its own. 
         [0128]    When the processes of the 2-page aggregate print processing are displayed on the operation panel  15  in this manner, the user checks the display and performs an operation to make a request for the 2-page aggregate print of the designated pages on the operation panel  15 . Then, in the image processing device  10 , the operation accepting unit  22  accepts the request for printing, and the print data outputting unit  29  outputs the print data, which is based on the pages subjected to the layout conversion and stored in the memory of the thumbnail image generating unit  23 , to the image forming unit  17 . 
         [0129]    It should be noted that, in this example of operations, it is assumed that F (i) frames constituting animation, which indicates the state where the i-th sheet image and the (i+1)-th sheet image are brought near to each other and are reduced to be imposed on one sheet image, are generated in step  258 ; however, the operation is not limited thereto. For example, the configuration may be such that F (i) frames constituting animation, which indicates the state where the i-th sheet image and the (i+1)-th sheet image are brought near to each other and are reduced, are generated as frames to be displayed earlier, and F (i) frames constituting animation, which indicates the state where the i-th sheet image and the (i+1)-th sheet image are imposed on one sheet image, are generated as frames to be displayed later. Or, the configuration may be such that some frames constituting animation, which indicates the state where the process to bring two documents near to each other and reduce thereof is concurrently performed on all of the document images, are generated as frames to be displayed earlier, and F (i) frames constituting animation, which indicates the state where the i-th sheet image and the (i+1)-th sheet image are imposed on one sheet image, are generated as frames to be displayed later. 
         [0130]    Further, in this operation example, the number of frames with respect to the variable i is determined in step  257  and the frames of the determined number are formed in step  258  for controlling the speed of animation display of the processes in the 2-page aggregate print processing; however, the operation is not limited thereto. For example, it may be allowed to determine the display time per one frame with respect to the variable i in step  257 , generate the same number of frames irrespective of the variable i in step  258  and store the frames to be associated with the determined display time, and thereby to display each frame for the display time associated therewith. Further, with more generalization, a method may be employed such that the speed of the animation display per each value of the variable i becomes the speed responding to the value of the variable i. Here, the value of the variable i is an example of the order of selecting the specific image. 
         [0131]    Incidentally, in the exemplary embodiment, the example of operations to achieve the display example in  FIGS. 2A to 2F  is shown by the flowchart in  FIG. 8  and the example of operations to achieve the display example in  FIGS. 3A to 3F  is shown by the flowchart in  FIG. 9 , while operation examples to achieve the display examples in  FIGS. 4A to 4D ,  FIGS. 5A to 5C  and  FIGS. 6A to 6H  are not explicitly shown. However, the display examples in these figures are shown by combining the flowcharts in  FIGS. 8 and 9 , or adding a slight modification to these flowcharts. 
         [0132]    in other words, an example of operations to achieve the display example in  FIGS. 4A to 4D  is shown by a flowchart in which steps up to step  261  in the flowchart in  FIG. 9  are followed by step  205  and steps subsequent thereto in the flowchart in  FIG. 8 . 
         [0133]    In addition, an example of operations to achieve the display example in  FIGS. 5A to 5C  is shown by a flowchart in which steps up to step  211  in the flowchart in  FIG. 8  are followed by a step of generating a frame indicating an operation to separate document images from the front side and backside of each sheet image, and thereafter, followed by step  255  and subsequent steps in the flowchart in  FIG. 9 . 
         [0134]    Further, an example of operations to achieve the display example in  FIGS. 6A to 6H  is shown by a flowchart in which steps up to step  254  in the flowchart in  FIG. 9 , where step  254  is modified to accept designation of the saddle-stitch bookbinding, are followed by a step of generating a frame indicating an operation to rearrange the document images as shown in  FIG. 6C , then followed by steps  255  to  261  in the flowchart in  FIG. 9 , and thereafter, followed by step  205  and steps subsequent thereto in the flowchart in  FIG. 8 . 
         [0135]    Moreover, in the exemplary embodiment, the description has been given to the animation display of the processes in print processing; however, the present invention is not limited thereto. For example, on the occasion of change of setting from color printing to monochrome printing, change of contrast setting, change of a binding margin or the like, animation may be provided between the state before changing and the state after changing for making it easy to understand an amount of change. 
         [0136]    Further, in the exemplary embodiment, the description has been given on the assumption that the operation to perform animation display of the processes in print processing is executed by the image processing device  10 ; however, the operation may be executed by any device. 
         [0137]    Accordingly, on an assumption that such operation is executed by a computer  90 , a hardware configuration of the computer  90  will be described. 
         [0138]      FIG. 10  is a diagram showing a hardware configuration of the computer  90 . 
         [0139]    As shown in  FIG. 10 , the computer  90  includes a central processing unit (CPU)  91  as an arithmetic unit, a main memory  92  as a storing unit and a magnetic disk device (HDD: Hard Disk Drive)  93 . Here, the CPU  91  executes an operating system (OS) and various kinds of software such as application, and achieves various processing units as described above. The main memory  92  stores various kinds of software, data used for executing the software and the like, while the magnetic disk device  93  stores input data to various kinds of software, output data from various kinds of software and the like, and at least one of the main memory  92  and the magnetic disk device  93  achieves above-described each storing unit. 
         [0140]    Furthermore, the computer  90  includes a communication I/F  94  that performs communication with external devices, a display mechanism  95  including a video memory, a display and the like, and an input device  96  such as a keyboard and a mouse. 
         [0141]    The program that achieves the exemplary embodiment may be provided not only by a communication unit but also by being stored in a recording medium such as a CD-ROM. 
         [0142]    The foregoing description of the exemplary embodiment of the present invention has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations will be apparent to practitioners skilled in the art. The exemplary embodiment was chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to understand the invention for various embodiments and with the various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the following claims and their equivalents.