Patent Publication Number: US-9852111-B2

Title: Document summarization

Description:
BACKGROUND 
     The present invention relates to summarization of documents. 
     The problem of identifying a gist of a document is conventionally referred to as the text summarization or document summarization problem. Traditional document-summarization techniques focus on the central idea of the text of the document. Various computer algorithms have been developed to automatically generate the summary of the document. However, there is a need to have a desired length of the generated summary of the document based on the reading habits of a reader of the document. 
     SUMMARY 
     A computer implemented method, system and a computer program product for summarizing a document is provided which includes receiving a reading speed of the reader, determining a summary length of a summary of the document based on the received reading speed of the reader, and generating a summary of the document having the determined summary length. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         FIG. 1  illustrates a block diagram of a computing system for implementing embodiments of the present invention. 
         FIG. 2  illustrates a block diagram of a system for implementing embodiments of the present invention. 
         FIG. 3  illustrates a matrix of reading speeds and corresponding summary lengths. 
         FIG. 4  illustrates a flowchart depicting steps to be performed for implementing an embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a system, method or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware embodiments that may all generally be referred to herein as a “circuit,” “module” or “system.” Furthermore, embodiments of the present invention may take the form of a computer program product, embodied in one or more computer readable medium(s) having computer readable program code embodied thereon. 
     Any combination of one or more computer readable medium(s) may be utilized. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. 
     A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. 
     Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing. 
     Computer program code for carrying out operations for embodiments of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the “C” programming language or similar programming languages. The program code may execute entirely on the user&#39;s computer, partly on the user&#39;s computer, as a stand-alone software package, partly on the user&#39;s computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user&#39;s computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider). 
     Embodiments of the present invention are described below with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. 
     These computer program instructions may also be stored in a computer readable medium that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the computer readable medium produce an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks. 
     The computer program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. 
       FIG. 1  illustrates a block diagram of a computing system for implementing an embodiment of the present invention. The computing system includes a computing device  110 , which in turn includes a processing unit  112 , a system memory  114 , and a system bus  116  that couples various system components including the system memory  114  to the processing unit  112 . The system bus  116  may be any of several types of bus architectures, including a memory bus, a memory controller, a peripheral bus, and a local bus using any of a variety of bus architectures, such as PCI. The system memory  114  includes a Read Only Memory (ROM)  118  and a Random Access Memory (RAM)  120 . A Basic Input/Output System (BIOS)  122 , containing the basic routines that help to transfer information between elements within the computing device  110 , such as during start-up, is stored in the ROM  118 . The computing device  110  further includes a Hard Disk Drive (HDD)  124  as computer-readable storage media. The HDD  124  is connected to the system bus  116  by an HDD interface  126 . The HDD  124  provides a non-volatile storage for computer-readable instructions, data structures, program modules, and other data for the computing device  110 . Although the exemplary environment described herein employs the HDD  124 , it should be appreciated by those skilled in the art that other types of computer-readable storage media, which can store data that is accessible by computer, such as RAM, ROM, removable magnetic disks, removable optical disks, and the like may also be used in the exemplary operating environment. 
     A number of program modules may be stored on the HDD  124 , including an operating system  128 , one or more application programs  130 , other program modules  132 , program data  134 , and a database system  136 . The operating system  128 , the one or more application programs  130 , the other program modules  132  and program data  134  may be loaded onto the system memory  114  and specifically onto the RAM  120  during the functioning of the computing device  110 . A user may provide commands and information through input devices, such as a keyboard, and receive output through peripheral output devices, such as monitor, speaker, printer, etc. These input and output devices are often connected to the processing unit  112  through an I/O adapter  140  coupled to the system bus  116 . 
     In a networked environment, the computing device  110  may be connected to a remote computing device  142  through a network interface card  144 . It will be appreciated that the network connections shown are exemplary, and any conventional means  141  of establishing communications links between the computers, such as a local area network, wide are network or wireless connection, may be used. In a networked environment, program modules depicted relative to the computing device  110 , or its components, may be stored in a remote memory  146 . The remote computing device  142  may be a personal computer, a router, a server, a network PC, a peer device, or other common network device. 
     Those of the ordinary skill in the art will appreciate that the hardware in  FIG. 1  is a basic computing system and may vary. The architecture of the aforementioned computing device is not limiting and is only depicted as an example on which an embodiment of the present invention may be implemented. Other types of computing system such as a smart phone or a web-kiosk are well within the intended scope on which an embodiment of the present invention may be implemented 
       FIG. 2  illustrates a block diagram of a system for implementing embodiments of the present invention. A reading device  201  used by a reader  202  for summarizing a document may be a device comprising a computing system as shown in  FIG. 1 . The reading device  201 , according to an embodiment, may comprise various modules to perform various operations as shown distinctively in boxes in  FIG. 2  and described hereinafter. Each of the hereinafter described modules, which comprise computer program codes, may be configured to operate in conjunction with each other and incorporated in a software application running on the reading device  201  for summarizing the document. The reader  202  through an input module  203  seeks to summarize the selected document. The input module  203  may comprise a Graphical User Interface (GUI) to enable the reader  202  to select or receive a document for summarization. Selecting the document may include selecting the document stored within an internal memory of the reading device  201  or from an external memory accessible through the reading device  201 . The input module  203  may additionally provide a framework to receive a reading speed of the reader  202 . The method of receiving the reading speed of the reader  202  may vary according to embodiments. For example, the input module  203  may require the reader  202  to input a reading speed. 
     In one embodiment, the reading speed of a user is automatically determined according to how a particular user interacts with an e-reader, browser, e-mail system, etc. For example, assume that an e-reader displays one page at a time, and that each page contains 100 words. Assume further that a particular user turns to a next displayed page on the e-reader every 60 seconds. Thus, the reading speed for this user is 100 words per minute, which is automatically determined by a system detecting that each 100 word page is turned (i.e., replaced on the e-reader&#39;s display with a new 100 word page) every minute. Or course, each page may or may not contain exactly 100 words, but the system is able to determine exactly how many words are on each page, as well as how long a reader stays on each page before turning it, thus enabling the system to calculate the user&#39;s reading speed (in words-per-minute). A similar process is used to track how long a user stays on a webpage having a known number of words before switching to a new webpage; how long a user displays an e-mail having a known number of words before minimizing/closing the e-mail; etc. 
     Alternatively, the input module  203  may be configured to automatically retrieve a pre-determined reading speed of the reader. The pre-determined reading speed of the reader may be stored in a memory in communication with a computer implementing an embodiment of the invention. The pre-determined reading speed of the reader may be determined through a reading speed recorder module  204 . The reading speed recorder module  204  may be a part of the aforementioned software application for summarizing the document or a separate software application running independently in the reading device  201  or in a separate computing device as shown in  FIG. 1 . The aforementioned determination of the reading speed of the reader may be through a suitable computer program code or algorithm embedded within the reading speed recorder module  204  and known to a person skilled in the art. 
     A summarization module  205 , receives an input to summarize the document through the input module  203  along with the reading speed of the reader  202 . The summarization module may comprise a pre-defined computer implemented algorithm known to a person skilled in the art to summarize the document. The summarization module  205 , before generating a summary of the document, determines a summary length of the document. The aforementioned computer implemented algorithms known to a person skilled in the art for generating the summary of the document may be modified to generate the summary of the document of having a specific summary length based on the reading speed of the reader  202 . The summary length is determined, according to an embodiment, from a table of reading speeds and corresponding summary length as shown in  FIG. 3  stored in the reading device  201  or accessible to the reading device  201 . The reading speed received by the summarization module  205  from the input module  203  is searched by the summarization module  205  in the aforementioned table to determine the appropriate summary length corresponding thereto. The document is summarized having the aforementioned summary length as determined. According to an embodiment, the unit of the reading speeds may be expressed in paragraph or pages or words per unit time and the corresponding summary lengths may be expressed in words. 
     The summarized document is subsequently displayed to the reader  202  through a display unit  206  of the reading device  201 . 
       FIG. 4  illustrates flowcharts depicting steps to be performed for implementing an embodiment of the present invention. At step  401 , a reader seeks to summarize a selected document in a reading device. The reading device may be a device comprising a computing system as shown in  FIG. 1 . At step  402 , a reading speed of the reader is received by the reading device before the document is summarized. The method of receiving the reading speed of the reader may vary according to embodiments. For example, the reader may input a reading speed. Alternatively, the reading device may be configured to automatically retrieve a pre-determined recorded reading speed of the reader stored in a memory in communication with the reading device. 
     At step  403 , a summary length of the summary to be generated of the document is determined. The summary length is determined, according to an embodiment, from a table of reading speeds and corresponding summary length as shown in  FIG. 3  stored in the reading device or accessible to the reading device. The reading speed received by the reading device is searched in the aforementioned matrix to determine the appropriate summary length corresponding thereto. According to an embodiment, the unit of the reading speeds may be expressed in paragraph or pages or words per unit time and the corresponding summary lengths may be expressed in words. 
     At step  404 , a summary is generated having the determined summary length using pre-defined computer implemented algorithm known to a person skilled in the art to summarize the document. 
     At step  405 , the generated summary of the document is displayed to the reader through a display unit of the reading device. 
     According to aforementioned embodiments, the document is summarized based on the reading speed of the reader. 
     While the present invention has been described as determining a length of a document summary according to a reading speed of a reader, in one embodiment the document summary is further customized according to identified interests of the reader. For example, assume that a document describes several topics, including “how to invest in stocks”, “current geopolitical issues”, and “popular culture” (i.e., current art, music, movies, etc.). Assume further that data mining shows that the reader is primarily interested in stock investments. This data mining can be performed by examining databases (e.g., browsing histories, e-mail folders, etc.) in order to determine what genres of e-books, webpages, etc. have been read by the reader; the content of e-mail and other electronic documents (e.g., blog postings) that the reader has generated; an educational and/or employment background of the reader; etc. Once the primary interest of the reader is ascertained by such data mining, then the summary of the document is modified to reflect the reader&#39;s interests. Thus, if the primary interest of the reader is stock investments, then the document summary is modified to describe information from the document that relates to stock investments. 
     In one embodiment, different identified interests of the reader are weighted (e.g., according to the frequency of readings/writings of the reader on different topics of interest), such that the summary of the document is modified to reflect these weights. Thus, in the document example above, if a reader has a reading/writing history of which 70% is related to stock investments, 20% is related to current geopolitical issues, and 10% is related to popular culture, then the length/content of the summary of the document will also reflect this same 70/20/10 breakdown. That is, 70% of the summary is devoted to (i.e., describes) stock investments, 20% of the summary is devoted to current geopolitical issues, and 10% of the summary is devoted to popular culture. 
     In another embodiment of the present invention, the interests (weighted or unweighted) of the reader are received by inputs from the reader. For example, a profile of the reader can be generated by the reader selecting and/or otherwise inputting different areas of interest to the reader. This profile is then used to modify/customize summaries of documents read by that particular reader. 
     The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and compute program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. 
     The descriptions of the various embodiments of the present invention have been presented for purposes of illustration, but are not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen to best explain the principles of the embodiments, the practical application or technical improvement over technologies found in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.