WO2014086277A1

WO2014086277A1 - Professional notebook convenient for electronization and method for automatically identifying page number thereof

Info

Publication number: WO2014086277A1
Application number: PCT/CN2013/088425
Authority: WO
Inventors: 曹璐; 镇立新; 罗希平
Original assignee: 上海合合信息科技发展有限公司
Priority date: 2012-12-05
Filing date: 2013-12-03
Publication date: 2014-06-12
Also published as: CN102938061A

Abstract

The present invention provides a professional notebook convenient for electronization and a method for automatically identifying page number thereof. The method comprises: photographing a paper page image of the professional notebook convenient for electronization; determining a type of a paper page according to the paper page image, so as to obtain a position, in the paper page, of a page number labeling area printed on the paper page of the professional notebook; determining, by using a straight line detection method in the image, four edge lines of the paper page image, correcting a page area limited by the four edge lines as a square area, and determining an accurate position of the page number labeling area in the square area; and adding page number content in the page number labeling area into an electronic file of the paper page. In the present invention, a page number labeling area is printed on a paper page of a notebook, and when application software such as CamScanner is used to perform electronization, the page number content of the page number labeling area is identified automatically, thereby being convenient for management and querying of the electronic file.

Description

Easy-to-electronic professional notebook and its page number automatic identification method

The invention belongs to the technical field of electronic computers, and relates to a page number identification method for an electronic document, in particular to a professional notebook which is convenient for electronic use and a method for automatically identifying the page number thereof. Background technique

In daily life, people often need to take paper documents, save them in JPEG format, or generate PDF documents, so that paper documents can be electronically and conveniently managed. Smartphones are one of the commonly used tools for electronically documenting paper documents. Since the camera is usually equipped with a camera on the smartphone, the camera on the mobile phone can take a paper document, and the captured electronic document can be processed into a certain image, and then converted into a JPEG format photo, or a PDF document can be generated. Applications with the above features have also become more popular, such as apps in the Apple App Store and the Google Store.

CamS _Canne r. These applications can automatically monitor the four sides of the captured document from the captured image, use this as a reference to cut off the background outside the document area in the image, and perform correction and image enhancement on the document area to obtain a scanner similar to the one used. The effect of scanning a clean and clean electronic document is saved and managed in a user-specified format.

The common paper documents that need to be electronically are paper notebook pages. For a long time, people often use paper notebooks to make various records, such as meeting minutes, memo records, etc., there will be a few paper notebooks. Ten or even hundreds of pages of paper, and the same type of notebook, the style of all the paper sheets used for recording is generally uniform. Some notebook pages have a page number printed on them, but the general notebook page does not print the page number, the bottom of the bottom line printed on the notebook page, until the bottom edge of the page is blank, just for the sake of beauty, no actual effect. Electronically copy notebook pages with application software such as CamScanner, and save them to electronic devices such as smartphones in JPEG image format or PDF document format. After the number of electronic pages increases, management and retrieval will be performed. It is getting more and more difficult. For example, when people see a document recorded on a paper notebook page, and want to find an electronic document of the page, when viewing the annotations that have been made on this electronic document, it may take hundreds of thousands. Searching one by one in an electronic document is very troublesome. Summary of the invention In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a professional notebook that is convenient for electronic use and a method for automatically identifying the page number thereof, which is used to solve the disorder of the electronic document of the paper page in the prior art, which is difficult to be Implement the management and query of content.

To achieve the above and other related objects, the present invention provides a professional notebook that is convenient for electronic use and an automatic identification method for the page number thereof.

A professional notebook that is convenient for electronic printing, and a page marked area is printed on a paper page of the electronic notebook that is convenient for electronic use.

Preferably, the page number labeling area is fixedly disposed at a designated position on the paper page.

A method for automatically recognizing a page number of a professional notebook that is convenient for electronic use, and the method for automatically recognizing a page number of the electronic notebook for convenient electronicization includes:

Take a paper page image of a professional notebook that is convenient for electronic use;

Determining a type of the paper page according to the paper page image, thereby obtaining a position of a page number labeling area printed on a paper page of the professional notebook in the paper page;

Determining four edge lines of the paper page image by a line detection method in the image, and correcting the page area defined by the four edge lines to a square area, and determining an accurate position of the page number labeling area in the square area;

Identifying the page number content in the page number labeling area is added to the electronic document of the paper page. Preferably, the type of the paper page is determined by the size and format of the paper page; the format of the paper page includes the number of branch lines printed on the paper page, or / and whether there is a page number labeling area, or / and page number mark the size and location of the area.

Preferably, in a case where the type of the paper page is known in advance, a specific implementation manner of determining the type of the paper page according to the paper page image is: manually specifying the type of the paper page.

Preferably, in a case where the type of the paper page is known in advance, a specific implementation manner of determining the type of the paper page according to the paper page image is: a fixed position on the paper page Printing a type of mark; detecting a type mark on the paper page image, comparing the detected type mark to a previously known type mark, and finding the type to which the paper page belongs.

Preferably, in a case that the type of the paper page is not known in advance, the specific implementation manner of determining the type of the paper page according to the paper page image is: creating a new type of paper page, inputting the type The size and format of an unknown paper page. Preferably, the page number labeling area is a printed font area or a handwritten font area.

Preferably, when the page number labeling area is a handwritten font area, it is determined whether the page number labeling area is blank, if not, the page number identification is performed, otherwise the page number identification is not performed; the specific determining method is: marking the area of the page code The image block is binarized to detect the number of pixels of the front sights representing the handwriting of the user. If the proportion of the number in the entire page number labeling area exceeds a preset threshold, the page labeling area is not blank. Otherwise it is blank. As described above, the electronic notebook and the automatic identification method for the page number thereof have the following beneficial effects:

The invention solves the electronic document of the paper page by printing the page number labeling area on the notebook paper page and automatically identifying the page number content of the page labeling area when the notebook paper page is electronicized by the application software such as CamScanner. The order of confusion is conducive to electronic document management and query. DRAWINGS

FIG. 1 is a schematic view showing the structure of a professional notebook which is convenient for electronic use according to the present invention. FIG. 2 is a schematic view showing another structure of a professional notebook which is convenient for electronic use according to the present invention. FIG. 3 is a flow chart showing the automatic page number identification method of the electronic notebook which is convenient for electronic use according to the present invention. Component label description

100 paper pages;

101 page numbering area. detailed description

The embodiments of the present invention are described below by way of specific specific examples, and those skilled in the art can readily understand other advantages and advantages of the present invention from the disclosure of the present disclosure. The present invention may be embodied or applied in various other specific embodiments, and the details of the present invention may be variously modified or changed without departing from the spirit and scope of the invention.

Please refer to the attached picture. It should be noted that the illustrations provided in this embodiment illustrate the present only in a schematic manner. In the basic concept of the invention, only the components related to the present invention are shown in the drawings, instead of being drawn according to the number, shape and size of the components in actual implementation, and the type, number and proportion of each component in actual implementation may be one. Feel free to change, and its component layout can be more complicated.

The invention will now be described in detail in conjunction with the embodiments and the drawings. Embodiment 1

The embodiment provides a professional notebook that is convenient for electronic use. As shown in FIG. 1, the page number labeling area 101 is printed on the paper page 100 of the electronic notebook that is convenient for electronic printing. Specifically, the page number labeling area 101 is fixedly disposed at a specified position on the paper page 100. Thus, when the paper page 100 is electronically printed, the page number labeling area 101 can be accurately scanned, and the page number content in the extracted page number labeling area 101 is added to the electronic document of the page number. The above specified position can be anywhere on the paper page, such as the header position of the paper page, or the position of the footer, see Figures 1 and 2.

The embodiment further provides a method for automatically recognizing a page of a professional notebook which is convenient for electronic use, wherein the professional notebook which is convenient for electronic use is a convenient professional electronic notebook provided by the embodiment, as shown in the figure.

As shown in FIG. 3, the automatic page number identification method of the electronic notebook is convenient for:

Take a paper page image of a professional notebook that is easy to electronic. In this embodiment, a page number labeling area is printed on the paper page of the electronic notebook that is convenient for electronic printing. The page number labeling area is fixedly disposed at a specified position on the paper page. In this way, when the paper page is electronically printed, the page number labeling area can be accurately scanned, and the page number content in the page number labeling area is extracted. The page number labeling area is used for the user to write or print the page number. For example, under the last branch line of the notebook page, a rectangular area is printed with a dotted line to prompt the user to write the page number therein. The page number can be in the form of a number, or a letter, or any form that distinguishes the order.

The type of the paper page is determined based on the paper page image, thereby obtaining a position of a page number labeling area printed on a paper page of the professional notebook in the paper page. In this embodiment, the type of the paper page is determined by the size and format of the paper page; the format of the paper page includes the number of branch lines printed on the paper page, or/and whether there is a page number labeling area. , or / and page number to mark the size and location of the area. That is, the format of the paper page may be any kind of situation, for example, only the branch line is printed on the paper page, or only the page mark area and the size and position of the page mark area are printed, or both The printed line has a page mark area printed on it.

Determining four edge lines of the paper page image by a line detection method in the image, and four The page area defined by the edge line is corrected to a square area, and the exact position of the page number labeling area in the square area is determined. In this embodiment, four straight lines representing the outer edge of the page in the page image are acquired by the line detection in the image, and the four background areas outside the range defined by the outer edge of the page are cut off, and the four outer pages are represented by the four lines. The captured image is corrected based on the straight line, and the four page areas defined by the straight lines representing the outer edge of the page are corrected into a square area, which may be a rectangular area or a square area. The exact position of the page number labeling area in the paper page can be determined according to the type of the paper page and the corrected page area, thereby accurately obtaining the page number of the paper page.

Identifying the page number content in the page number labeling area is added to the electronic document of the paper page. In this embodiment, the page number labeling area is extracted from the corrected paper page image, and the page number content printed or handwritten in the page labeling area is identified, and the page number content is added to the electronic document of the paper page. , for later management and query. The page number labeling area is a printed font area or a handwritten font area. When the page number labeling area is a handwritten font area, it is determined whether the page number labeling area is blank, if not, the page number identification is performed, otherwise the page number identification is not performed; the specific determining method is: performing image block of the page number labeling area Binary processing, detecting the number of pixels of the front sights in which the user's handwriting is represented. If the proportion of the number in the entire area exceeds a preset threshold, the page number labeling area is not blank, otherwise it is blank. . Specifically, since it is known in advance that the page number needs to be recognized, the accuracy of the recognition is greatly improved. There are two situations at this time. One is that the page number is printed. This type of page number is generally Arabic numerals, which is easy to identify and has high accuracy. The other is that the page number is filled by the user. In this case, First, it is judged whether the user has handwritten the page number in this area, and there are many methods for judging. Here, a judgment example is given to illustrate the technical feasibility, such as performing binary value on the image block representing the extracted page code labeling area. Processing, checking the number of pixels of the front sights representing the handwriting of the user, if the proportion of the number in the entire page number labeling area exceeds a predetermined threshold, the page labeling area is considered to be blank. Otherwise, it is considered that the page number writing area is blank; if it is detected that the page number labeling area is blank, no identification of the page number is performed; if it is detected that the page number labeling area is not blank, handwriting is performed in the area Identification of page numbers.

The invention automatically prints the page number content of the page labeling area by printing the page number labeling area on the notebook paper page, and automatically digitizes the notebook paper page when using the application software such as CamScanner, thereby facilitating electronic document management and query. The method of increasing the page number labeling area determines the order of the electronic document, which not only facilitates the management and query of the electronic document, but also makes the reading of the electronic document faster and clearer. Embodiment 2

The embodiment provides a method for automatically recognizing the page number of the professional notebook which is convenient for electronicization, and the difference from the automatic page number identification method of the electronic notebook for facilitating electronicization according to the first embodiment is: the paper page is known in advance. The specific implementation manner of determining the type of the paper page according to the paper page image is: manually specifying the type of the paper page; that is, manually specifying the image before the image is taken, or after the image is processed after the image is taken. The type of notebook paper page to which it belongs, such as one of a series of notebook page types that are pre-stored in applications such as camScanner. Embodiment 3

The embodiment provides a method for automatically recognizing the page number of the professional notebook which is convenient for electronicization, and the difference from the automatic page number identification method of the electronic notebook for convenient electronicization according to the first and second embodiments is: the paper is known in advance The type of the page, the specific implementation manner of determining the type of the paper page according to the paper page image is:

A type of indicia is printed at a fixed position on the paper page; the type of indicia can be a text, a symbol, a graphic, or a combination of any two or three.

A type mark on the paper page image is detected, and the detected type mark is compared with a previously known type mark to find out the type to which the paper page belongs. Printing a type mark on a fixed position on the paper page; that is, printing a pre-designed mark (ie, type mark) on a specified position of each paper page of the notebook in advance, and acquiring the notebook in the photographing After the image of the paper page, the four outer edges of the paper page of the notebook are detected in the image, and the approximate position of the mark is determined in the image of the paper page with reference to the four outer edges, thereby realizing the mark The detection in the image then compares the detected mark with the pre-stored mark of the paper page representing a plurality of different types of notebooks to find out the type of the paper page of the photographed notebook. The detected mark is compared with the pre-stored mark representing a plurality of different types of notebook paper pages to find out the type of the paper page of the photographed notebook, which involves handwriting recognition, text recognition, Mature techniques in the art such as image matching are not described herein. Embodiment 4

The embodiment provides a method for automatically recognizing a page of a professional notebook which is convenient for electronic use, and the implementation thereof The difference in the automatic page number identification method of the electronic notebook for convenience in the first embodiment is: the type of the paper page is not known in advance, and in this case, the paper page is determined according to the paper page image. The specific implementation of the type is:

Create a new type of paper page and enter the size and format of the unknown paper page.

That is, if the paper page of the notebook being photographed does not belong to a type of paper page printed with bold or/and lengthened branch lines, or/and a line of division, or/and a title area, which is known in advance by an application such as CamScanner. Then, in the subsequent steps, the type of the unknown paper page is first added to the type of the newly created paper page, and then the subsequent processing is performed.

The invention needs to know in advance the printing type of the page number or the page number labeling area in the application software such as CamScanner, and the position of the corresponding page number or page number labeling area in the notebook page, so as to realize the notebook page (ie the above paper quality) Pages are automatically added to the page number in the electronic document. If the notebook page has a printed or user-written page number before the electronic version, the method of the present invention can electronically identify the page number and save it, which is very advantageous for the subsequent retrieval of the electronic document. The invention facilitates the electronic document management method by printing a page number labeling area on a notebook page and automatically identifying the page number when the notebook page is electronically used by an application software such as CamScanner.

In summary, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value. The above-described embodiments are merely illustrative of the principles of the invention and its advantages, and are not intended to limit the invention. Modifications or variations of the above-described embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and scope of the invention are still covered by the appended claims.

Claims

Claim

A professional notebook that is convenient for electronic use, characterized in that a page mark area is printed on a paper page of the electronic notebook that is convenient for electronic use. The electronic notebook of claim 1 or 2, wherein: the page number labeling area is fixed at a designated position on the paper page. A method for automatically recognizing a page number of a professional notebook which is convenient for electronic use, characterized in that the automatic page number identification method of the electronic notebook is convenient for:

Determining four edge lines of the paper page image by a line detection method in the image, and correcting the page area defined by the four edge lines into a square area, determining an exact position of the page number labeling area in the square area; The page number content in the page number area is added to the electronic document of the paper page. The automatic page number identification method for a convenient electronic notebook according to claim 3, wherein: the type of the paper page is determined by the size and format of the paper page; and the format of the paper page includes The number of line breaks printed on the paper page, or / and whether there is a page mark area, or / and the size and position of the page mark area. The automatic page number recognition method for a convenient electronic notebook according to claim 3, wherein: the page number labeling area is fixedly disposed at a designated position on the paper page. The method for automatically recognizing a page number of a professional electronic notebook according to claim 3, wherein: when the type of the paper page is known in advance, determining the image according to the paper page image The specific implementation of the type of paper page is: Manually specify the type of the paper page. The method for automatically recognizing a page number of a professional electronic notebook according to claim 3, wherein: when the type of the paper page is known in advance, determining the image according to the paper page image The specific implementation of the type of paper page is:

Printing a type of mark at a fixed position on the paper page; A type mark on the paper page image is detected, and the detected type mark is compared with a previously known type mark to find out the type to which the paper page belongs. The method for automatically recognizing a page number of a professional electronic notebook according to claim 3, wherein: when the type of the paper page is unknown in advance, the paper is determined according to the paper page image The specific implementation of the type of the quality page is:

Create a new type of paper page and enter the size and format of the unknown paper page. The automatic page number identification method for a professional electronic notebook according to claim 3, wherein the page number labeling area is a printed font area or a handwritten font area. 0. The automatic page number identification method for a professional electronic notebook according to claim 9, wherein: when the page number labeling area is a handwritten font area, determining whether the page number labeling area is blank, if not The page number identification is performed, otherwise the page number identification is not performed; the specific determination method is: performing binarization processing on the image block of the page code labeling area, and detecting the number of the front sight pixels representing the user's handwriting, if the number is in the entire page number If the proportion of the marked area exceeds a preset threshold, the page number labeling area is not blank, otherwise it is blank.