JPH11288445A - Form recognition method and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain the character recognition of various kinds of slips with high recognition precision in a facsimile communication network without preparing any FAX-OCR(optical character reading) device or plural lines at a user side, or without using any specific slip in which format information or the like is embedded. SOLUTION: The controller of a facsimile communication network is provided with an image storing part 22 for storing image information, identification information sorting part 25 for storing identification information for identifying the kind of a slip, format information storing part 23 and character attribute information storing part 24 for storing slip information being information related with the entry area of the slip, slip identifying part 29 for identifying the kind of the slip by referring to the identification information storing part 25 from the received already entried slip image data, and character recognizing part 30 for operating the segmentation of a character area and character recognition by referring to the format information storing part 23 and the character attribute information storing part 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a form recognition method and apparatus in a facsimile communication network, and more particularly, to a form recognition apparatus in a facsimile communication network for transmitting filled-out form image data transmitted from a transmission terminal to the facsimile communication network. The present invention relates to a form recognition method and apparatus for accumulating and performing character recognition processing on this form image data and recognizing characters in each entry area in the completed form image data.

[0002]

2. Description of the Related Art A facsimile communication network combining a facsimile data storage conversion function and a telephone network has conventionally provided a character recognition service. This character recognition service utilizes a media conversion function of a facsimile communication network. A character or the like is written in a form on a transmission terminal side (end side), and the form is converted into a facsimile image via a facsimile apparatus. By transmitting the data to the facsimile communication network, the facsimile image is subjected to character recognition processing, and the obtained recognition result (character) code information is transmitted to the receiving side (center side). This character recognition service is widely used for ordering products and the like. For example, when the terminal retailer fills out a form with order data of goods to be received the next day and sends it to the wholesaler via the facsimile communication network, the image data is written in the form in the facsimile communication network. The order data is converted into code information, which is character data, and transmitted to the wholesaler on the center side. Since the wholesaler performs order processing based on the order data converted into the code information, it is possible to automate the order processing, thereby realizing cost reduction and quick delivery. .

[0003] The form used here is also commonly referred to as a mark sheet, but not only a mark is added to the mark but also a character to be recognized is entered in this form. It should be called a form, not a mark sheet.

In order to accurately extract code information by performing character recognition from facsimile data of a form (completed form image data), information on the form of the form is indispensable. However, in the case of a character recognition service in a facsimile communication network, it is necessary to process form image data in a variety of formats from a large number of users. Instead,
By printing the mark on the form in advance, format information and the like are embedded in the form itself. Specifically, for example, the position where the character to be recognized is written is represented by a black mark, or the intersection of the extension of each of the vertical mark and the horizontal mark becomes the character writing position. I have to. Regarding the character type of the character to be entered, the type of numeral, symbol, alphabet (alphabet), kana character, or the like is specified according to the form and number of marks.

Japanese Patent Application Laid-Open No. 9-179917 discloses a form I which is pre-printed at a specific position on a form, assuming that an image storage and exchange device in the network performs character recognition of the form.
A system that uses D to identify the type of form is disclosed. However, this method requires all users to imprint the form ID at the same position, so that it is easy to use from the standpoint of targeting unspecified users and using various forms. Is bad.

By the way, as a device for extracting character code information from image data of a form including characters entered by a user, an OCR (optical character reader) or a FAX-O which combines this OCR and a facsimile receiver is used.
There is a CR device. When such an OCR or FAX-OCR is provided on the individual user side, the form type used by the individual user is almost always limited.
Before reading a form, it is common to register in advance format information and the like on the form to be used.

[0007]

However, if a facsimile communication network is used without using a facsimile communication network and a facsimile is used to receive and process a certain number of forms, the form image data is transmitted. There are many lines and faxes because it is easy to concentrate in a certain time zone
-It is necessary to prepare an OCR device, which causes an economic problem. On the other hand, when a facsimile communication network is used, the facsimile communication network itself has a function of storing facsimile data, and the data sent from the facsimile communication network to the user (center side) is code information and is converted into image data. Since the data size is smaller, the burden on the equipment on the user side can be reduced, but since the facsimile communication network does not retain the format information of the form, unless special forms preprinted with marks etc. are used. In addition, there is a problem that the usability is poor, and if the imprinted mark or the like cannot be detected correctly, characters are erroneously recognized or cannot be recognized.

[0008] An object of the present invention is to provide a FAX-OC on the user side.
Without preparing R device and many receiving lines,
Provided is a form recognition method and apparatus that can perform character recognition of a variety of forms with high recognition accuracy in a facsimile communication network without using a special form in which format information or the like is embedded, and has high convenience. It is in.

[0009]

According to the present invention, format information on a form, such as the position of an entry column, the type of character to be entered in the entry column for each entry column, the attribute (type) of the entry column, etc. The information is held in the facsimile communication network, and for this purpose, a means for enabling the user to register such format information in the facsimile communication network is newly provided. With this configuration, it is possible to provide convenience to many users while maintaining the advantages of the facsimile communication network, and to use various forms for one user. Become.

That is, in the form recognition method of the present invention, filled-out form image data transmitted to a facsimile communication network is stored in a control device of the facsimile communication network, and a character recognition process is performed on the completed form image data. In the form recognition method for executing and recognizing characters in each entry area in the completed form image data, blank form image data corresponding to the blank form is created and stored in the control device, and the blank form image is created. Generates identification information used for identifying a form type from the data, including a feature amount as image data of the form, and for each type of form, the identification information of the form and information on an entry area of the form. Is stored in the control device, and data corresponding to the blank form is distributed to the end-side user.
When the end user transmits the filled-out form image data to the facsimile communication network, the control apparatus transmits the filled-out form image data using the identification information. A form type corresponding to the filled-out form image data is identified, a character area is cut out from the transmitted filled-out form image data based on the form information, and character recognition is performed.

A form recognition apparatus according to the present invention accumulates filled-out form image data transmitted to a facsimile communication network in a facsimile communication network, executes a character recognition process on the completed form image data, and fills in the form. In a form recognition device for recognizing characters in each entry area in completed form image data, a control device provided in a facsimile communication network is provided, and in the control device, blank form image data and filled form image data are stored. Image storage means for storing, identification information storage means for storing, for each type of form, identification information used for identifying the type of form including the feature amount as image data of the form, and information on the entry area of the form Form information storage means for storing form information for each form type, and calculating a feature amount from form image data A feature quantity calculating means and the identification information,
Form identification means for identifying the type of the form by referring to the identification information storage means from the received completed form image data,
There is provided a character recognizing means for extracting a character area from the filled-out form image data with reference to the form information accumulating means and performing character recognition.

In the present invention, the form information typically includes format information including the position and size of each entry area in the form, and a character indicating the type of character to be entered for each entry area. And attribute information.

In the present invention, the filled-out form image data received by the facsimile communication network does not include a mark for embedding format information and the like in the form. Therefore, on the facsimile communication network side, first, it is necessary to identify which form the received form image data corresponds to, and this identification is based on the identification information of the form registered in advance by the user with respect to the facsimile communication network side. Is executed with reference to However, the number of types of forms that the facsimile communication network must identify is expected to be enormous,
If a normal pattern recognition method is applied, high-speed and accurate identification may be difficult. Therefore, in the present invention, when identifying the type of a form included in the received image data, first, a rough feature is extracted from the entire form, a local feature is extracted, and a combination of these two features is extracted. The type of the form may be identified based on the form.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of a facsimile communication network constituting a form recognition apparatus according to a preferred embodiment of the present invention.

A facsimile communication network is generally a public telephone network or a public service integrated digital network (ISDN).
In addition, a facsimile image storage device and a service processing device are added (added on). Also in this case, the facsimile communication network is configured by connecting a control device 12, which is also a storage device as a facsimile communication network, to a network 11, such as a public telephone network or ISDN. The telephone 11 and the facsimile device 15 of the end user 13 are connected to the network 11, and the telephone 17 and the data terminal 18 of the center user 16 are connected. Here the data terminal 18
Is, for example, a personal computer connected to a network via a FAX modem, and is independent of the network 18 for word processing (word processing).
Application programs and the like can be executed. The data terminal 18 is also a terminal that receives, as code information, the result of character recognition performed on the filled-out form image data by the facsimile communication network side.

The end-side user 13 is a user who transmits a filled-out form including, for example, handwritten characters via a facsimile machine.
Is a user who receives character (code) information extracted from the filled-out form image data transmitted by the end-side user 13 to the facsimile communication network from the facsimile communication network side. In the present invention, a large number of users can handle various types of forms, respectively.However, registering form information of forms in a facsimile communication network is as follows.
Generally, it is the center user 16. Here, only one end-side user 13 and one center-side user 16 are shown, but in reality, a very large number of end-side users 13 and many center-side users 16 are connected to the network 11. doing.

FIG. 2 is a block diagram showing the configuration of the control device 12. As shown in FIG. The control device 12 includes a main unit 21 connected to the network 11 side, an image storage unit 22 that stores image information and is connected to the main unit 21,
A format information storage unit 2 for storing information (hereinafter referred to as format information) such as the geometric position and size of each entry area in the form and the line width of a frame line surrounding the entry area for each type of form.
3, a character attribute information storage unit 24 for storing information on the type of character in each entry area of the form (hereinafter referred to as character attribute information), and a feature amount as image data of the form for each form. An identification information storage unit 25 for storing as identification information, a communication control processing unit 26 for performing basic communication control processing as a storage device of a facsimile communication network, and a feature amount as image data of the form from the image data of the form. A feature amount calculation unit 27 to be calculated;
By interactively exchanging data with the user, the form information of the form is stored in the form information storage unit 23, and the character attribute information of the character to be entered in each entry area of the form is stored in the character attribute information storage unit 24. With reference to the registration processing unit 28 to be stored, the image storage unit 22, the format information storage unit 23, and the identification information storage unit 25, the form identification for identifying the type of the form corresponding to the form image data from the completed form image data. Unit 29 and a format information storage unit 23 and a character attribute information storage unit 24 based on the identification result of the form identification unit 29.
And a character recognizing unit 30 that cuts out character image data from each entry area and performs a character recognition process.

A communication control processing section 26, a feature quantity calculating section 27,
Registration processing unit 28, form identification unit 29, and character recognition unit 30
Is provided inside the main body 21. Image storage unit 22, format information storage unit 23, character attribute information storage unit 24
The identification information storage unit 25 is connected to the main unit 21 as an external storage device such as a magnetic disk device. The image storage unit 22 is also used for temporary storage of facsimile image data in normal facsimile communication without character recognition. The communication control processing unit 26 performs normal communication control processing as a facsimile communication network, stores the facsimile image data received from the network 11 side in the image storage unit 22, and stores the unfilled and filled-out form image data. Is stored in the image storage unit 22. The image storage unit 22, the format information storage unit 23, and the character attribute information storage unit 24
And the identification information storage unit 25 are an image storage unit, a format information storage unit, a character attribute information storage unit, and an identification information storage unit, respectively. In particular, the format information storage unit 23 and the character attribute information storage unit 24 store the form information. Means. Further, the feature amount calculation unit 27, the registration processing unit 28, the form identification unit 29, and the character recognition unit 30 are a feature amount calculation unit, a registration processing unit, a form identification unit, and a character recognition unit, respectively.

Next, a form recognition process using the facsimile communication network will be described. FIG. 3 is a flowchart showing the overall flow of this form recognition process.

First, the center user 16 designs a form, and creates a blank form using the word processing function of the data terminal 18 such as a personal computer. The created blank form is converted into form image data by a facsimile modem (not shown) or the like, transmitted to the network 11, and stored in the image storage unit 22 of the control device 12 (step 101). Then, form information registration processing for the form is executed (step 102). The registration process of the form information will be described later in detail, but the center side user 16 and the registration processing unit 28 interactively exchange data so that the format information and the character attribute information for the form are stored in the format information storage unit 23 and the This is a process of registering in the character attribute information storage unit 24, calculating the feature amount from the image data of the form by the feature amount calculation unit 27, and storing the calculated feature amount in the identification information storage unit 25 as identification information.

When the form information registration process is completed in this way, each end-side user 13 who has previously designated unfilled form image data in the image storage unit 22 using the broadcast communication function of the facsimile communication network. Facsimile machine 1
5 (step 103).

The end user 13 enters characters such as order data into the form output from the facsimile machine 15 (step 104). Then, the end-side user 13 transmits the completed form to the facsimile communication network via the facsimile device 15. Thus, the form collection processing via the network 11 has been performed (step 105), and the filled-out form image data from each end user 13 is stored in the image storage unit 22.

Next, a form identification unit 29 is used for each filled-out form image data stored in the image storage unit 22.
The form identification identifies whether the form corresponds to the form already registered in step 102, and whether the form corresponds to the form registered as a registered form. The process is executed (Step 106). Here, conditional branching is performed based on whether or not the filled-out form image data corresponds to the registered form (step 107). The recognition processing is executed (step 108), and the recognition result is transmitted to the center user 16 as code information (step 10).
9), end the processing. On the other hand, if the form does not correspond to the registered form in step 107, an error message indicating that the form data is not to be processed is attached to the end user 13 who transmitted the form image data. Send back the data (step 11
0), and the process ends.

Next, the registration processing of the form information in step 102 will be described with reference to FIG.

First, as the processing in step 101 of FIG. 3, the center-side user 16 transmits blank form image data (step 111), and stores the form image data in the image storage unit 22 (step 112). ).
Next, the registration processing unit 28 sends back the form image data to the center-side user 16 that has transmitted the unfilled form image data, thereby displaying the form image data on the screen of the data terminal 18 of the center-side user 16. The registered form image is displayed (step 113).

In accordance with the displayed form image, the center-side user 16 specifies the corresponding coordinates of the entry column in the form (step 114). Thereby, the coordinates of the character entry field are determined. And the center side user 16
Then, for each entry field (entry area), the type of character to be entered in that entry field is specified (step 115). This designation operation is performed interactively with the registration processing unit 28 by a graphical user interface, and the information on the coordinates of the entry fields and the types of characters to be entered is transmitted to the center side via the network 11. Is sent from the user 16 to the registration processing unit 28. Registration processing unit 28
Generates form information based on the information transmitted in this way, stores the format information in the format information storage unit 23, and stores the character attribute information in the character attribute information storage unit 24 (step 116). Further, the characteristic amount calculating unit 27 extracts characteristic amounts (the characteristics of the black pixel distribution and the arrangement of the entry columns) from the registered form image (step 117), and uses the extracted characteristic amounts as identification information. (Step 118). Thus, the registration processing of the form information in step 102 is completed.

Next, details of the processing (steps 106 to 108) when the completed form image data is sent from the end-side user 13 will be described with reference to FIG.

First, the characteristic amount is extracted from the transmitted filled-out form image data by the characteristic amount calculating section 27 (step 119), and then the processing is moved to the form identifying section 29 to extract the extracted characteristic. The difference between the identification information based on the amount and the identification information already registered in the identification information storage unit 25 is determined, and it is determined whether the difference is equal to or smaller than a threshold (step 120). At this point, since it is not known which type of form, the difference from all the registered identification information is determined. If it is not below the threshold, the processing is terminated assuming that it does not correspond to the registered form, and if it is below the threshold, it is stored in the format information storage unit 23 and the character attribute information storage unit 24. Based on the existing form information, the position of the entry area in the form image data is estimated (step 121), and the entry column is detected within a range near the estimated position (step 122).
The difference between the detected position of the entry field and the estimated position of the entry field is determined, and it is determined whether the difference is equal to or less than a threshold value (step 123). If it is equal to or smaller than the threshold value in step 123, it is assumed that the entry column has been detected, and a character area is cut out (step 124), and character recognition is performed on the cut out character by the character recognition unit 30 (step 125). , And the process ends. Step 12
If it is not equal to or smaller than the threshold value at 3, it is determined that it does not correspond to the registered form, and the process is terminated.

By the above process, the end user 13
The transmitted form data from is processed. Here, the processing from step 119 to step 123 corresponds to the form identification processing (step 106) in FIG. 3 (and the subsequent conditional branch in step 107), and the processing in step 124
And step 125 correspond to step 108 in FIG.

By the way, in the case of the present embodiment, if the form image data stored in the facsimile communication network is large, and various types of form image data are transmitted from a plurality of end users 13, It may be difficult to immediately determine which type of form these data corresponds to.

Therefore, the sorting of the form image data may be roughly classified first.

When a person classifies a plurality of types of forms by hand, it is considered that sorting is performed by paying attention to whether there are many or few entry fields or what are characteristic characters. So, here again, referring to this method,
First, a rough classification is performed, and then a detailed classification is performed to identify a form.

As an actual procedure, first, a small specific area is set in advance by paying attention to a line portion (a header part in a paper form) of the form image data, and characters in the specific area are recognized. By doing so, what is related to the form is roughly classified. Usually, it is considered that the title of the form is written in this position, so that the entire title may be recognized or only a part of the title may be recognized. The size, position, number, and the like of the specific area may be appropriately set in consideration of the properties of the form, the number of types, the processing speed, and the like.

Assuming that the entry column of the form is a ruled line frame area surrounded by ruled lines, it may be roughly determined whether the entry column region is large or small. In this case, it is conceivable to first extract a ruled line whose length is greater than or equal to the threshold value. In this case, a small frame in which a ruled line frame is isolated alone is ignored, and only a large ruled line frame area is extracted. Becomes With such a configuration, when there are many intersecting horizontal and vertical lines as in the entry column in a table format, only the outer frame and a specific area frame inside are extracted. Furthermore, if only the intersections at which the ruled lines intersect with each other are equal to or smaller than a threshold, for example,
Tabular parts that contain many small entries will be excluded.

In the present invention, the above rough classification is performed to reduce the number of candidate form types,
Fine sorting is performed, and finally, the type of the form corresponding to the completed form image data is identified.

Alternatively, identification information can be extracted by using a combination of two features, that is, an overall feature and a local feature, as a feature amount (identification information). By performing such processing, it is possible to narrow down the search range in the identification information storage unit when classifying by rough features, and to save the trouble of extracting detailed features from all regions. Become. In addition, by focusing on the characteristics of a specific region and comparing with the characteristics, accuracy can be improved.

FIG. 6 is a diagram showing an identification information extracting process according to such a procedure. Here, a case is considered where identification information is extracted from the form image data 41 written in large letters as “order sheet” along the upper end.

First, from the entire form image data 41, a ruled line having a length equal to or longer than a threshold, which is a major feature, is extracted, and the relationship between the position and length of the extracted ruled line and the mutual arrangement is characterized. And The use of this feature amount has the effect of limiting the reference range when referring to the second feature. The form image data 42 indicates the ruled lines extracted at this time.

Next, the distribution of black pixels and the arrangement of characters in a local specific region are extracted as the second feature value. This specific area can be set at a plurality of locations in order to improve the accuracy. The form image data 43 shows an example of the arrangement of characters to be referred to here. For example, an area surrounded by a dashed line in the drawing is a specific area, and the arrangement of characters in this specific area (here, “order”) is described. It is extracted as a second feature amount.

The efficiency of the identification information extracting process can be improved by extracting the above two feature amounts and registering and referring to the combination relationship in the identification information storage unit.

Although the preferred embodiment of the present invention has been described above, the method of distributing data relating to an unfilled form from a center-side user to an end-side user is described below by using a broadcast communication of a facsimile communication network. It is not limited to the one that uses the function.

For example, the document data of the word processor when the form was created in step 101 of FIG. 3 may be delivered to each end user 13 via the network 11 in the digital format. In that case, each end user 13
The document data is received by a data terminal (not shown) including a personal computer or the like connected to the network 11 via a modem (not shown). Then, the document data may be printed using the word processing function of the data terminal, entered in the printed form, and transmitted by the facsimile machine. When the modem is a FAX modem, the document data is added to the document data while editing the document data using a word processing function.
The data may be directly transmitted to the facsimile communication network using an AX modem. In the case of direct transmission using a FAX modem, there is no need to print out on paper.

[0043]

As described above, according to the present invention, the form information and the identification information are stored in the facsimile communication network, and the identification and the character recognition of the filled-out form image data are performed in the facsimile communication network by using these. By doing so, high-level recognition of characters in a wide variety of forms can be performed without preparing a FAX-OCR device or a large number of receiving lines on the user side, and without using a special form in which format information is embedded. It is possible to carry out with high accuracy and to obtain high convenience. Also, the identification information is automatically generated from the blank form image data, and the registration of the form information can be performed interactively with the user side, so that the registration of the identification information and the form information itself becomes easy. There is.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a facsimile communication network constituting a form recognition apparatus according to a preferred embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a control device of the facsimile communication network.

FIG. 3 is a flowchart showing an overall processing procedure in a form recognition method according to a preferred embodiment of the present invention.

FIG. 4 is a flowchart illustrating a form registration process.

FIG. 5 is a flowchart illustrating a form recognition process.

FIG. 6 is a diagram illustrating identification information extraction processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Network 12 Control device 13 End user 14, 17 Telephone 15 Facsimile device 16 Center user 18 Data terminal 21 Main unit 22 Image storage unit 23 Format information storage unit 24 Character attribute information storage unit 25 Identification information storage unit 26 Communication Control processing unit 27 Feature calculation unit 28 Registration processing unit 29 Form identification unit 30 Character recognition unit 41 Form image data 101 to 126 steps

Claims (11)

[Claims] 1. A filled-out form image data transmitted to a facsimile communication network is stored in a control device of the facsimile communication network, and a character recognition process is performed on the filled-out form image data, and In a form recognition method for recognizing characters in each entry area in the completed form image data, an empty form image data corresponding to an unfilled form is created and stored in the control device, and from the blank form image data Generates identification information used for identifying a form type including a feature amount as image data of the form, and for each type of form, the identification information of the form and information on an entry area of the form. Form information is stored in the control device, data corresponding to the blank form is distributed to an end-side user, and the end-side use is performed. When the transmitted form image data is transmitted to the facsimile communication network, the transmitted form image data is transmitted to the transmitted form image data using the identification information in the control device. Identify the form type corresponding to the completed form image data, cut out the character area from the filled-in form image data that has been transmitted based on the form information,
A form recognition method characterized by performing character recognition. 2. The form information includes at least form information including a position and a size of each entry area in the form and character attribute information indicating an attribute of a character type to be entered for each entry area. The form recognition method according to claim 1. 3. By distributing the blank form image data to the end-side user via the facsimile communication network, data corresponding to the blank form is distributed to the end-side user. 2. The form recognition method according to claim 1, wherein: 4. Distributing document data capable of reproducing the blank form image data to the end-side user to distribute data corresponding to the blank form to the end-side user. 2. The form recognition method according to claim 1, wherein 5. When identifying the form type, extraction of a ruled line frame area having a ruled line having a length equal to or longer than a threshold value and / or extraction of a character image included in a specific area on the form image data are performed. The form recognition method according to claim 1. 6. The form recognition according to any one of claims 1 to 4, wherein the form type is identified by combining the overall characteristics of the form image data with the local characteristics in the form image data. Method. 7. A completed form image data transmitted to a facsimile communication network is stored in the facsimile communication network, a character recognition process is performed on the completed form image data, and the completed form image A form recognition device for recognizing characters in each entry area in data, comprising a control device provided in the facsimile communication network, wherein the control device stores unfilled form image data and the filled form image data. Image storage means for storing, identification information storage means for storing, for each type of form, identification information used for identification of the form type, including a feature amount as image data of the form, and information on the entry area of the form Form information storage means for storing form information for each form type, and calculating feature values from form image data A feature value calculating unit that outputs and uses the form information as identification information; a form identification unit that identifies the type of a form by referring to the identification information storage unit from the received filled-out form image data; A form recognizing device, comprising: a character recognizing unit that cuts out a character area from completed form image data and performs character recognition. 8. The control device includes a registration processing unit that communicates with a user who has created the blank form image data, generates the form information, and stores the generated form information in the form information storage unit. The form recognition device according to claim 7. 9. The form information includes format information including the position and size of each entry area in the form, and character attribute information indicating an attribute of a character type to be entered for each entry area. 9. The form recognition apparatus according to claim 7, wherein said form information storage means comprises: format information storage means for storing said format information; and character attribute information storage means for storing said character attribute information. 10. Extracting a ruled line frame area having a ruled line having a length equal to or longer than a threshold value and / or extracting a character image included in a specific area on the form image data. The form recognition device according to claim 7, wherein identification is performed. 11. An overall feature of the form image data,
The form recognition apparatus according to claim 7, wherein the form type is identified by combining a local feature in the form image data.