JP2001283231A - Document image filing device and document image updating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent information, etc., which is not desired to be updated from being updated in original document image data when a document image is updated in a document image filing device. SOLUTION: In the device, first piece of image data stored in an image storage means is printed on a recording medium and outputted, the first image data is fetched as second image data via an image input means on performing correction by retouching the recording medium on which the first piece of image data is printed, the first image data is compared with the second image data, its differential data is extracted, an update processing is performed by adding the differential data to the first image data, an update processing inhibiting area or an update processing area is specified to the first image data and the update processing of the document image is performed based on the specified area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document image filing apparatus for updating an original document image based on the contents of a document image (document) printed and output on a recording medium such as paper, which is modified by handwriting or the like. The present invention relates to a document image updating method.

[0002]

2. Description of the Related Art Conventionally, when updating the contents of image data registered in a document image filing apparatus, the image data taken into the apparatus is directly written, or character data is separately prepared. Such methods as overlapping are used.

According to this method, since the updating operation is performed on the screen of the document image filing apparatus, the updating process can be performed relatively easily for a person who can handle a computer or the like, but for other people, Processing is troublesome and inefficient. In addition, when the document image is updated electronically on the device, there is a possibility that necessary information may be deleted at any time, which poses a security problem.

Further, in a method of reading an updated image on which corrections and the like have been made on a paper base and recording the read updated image, image data is read many times each time updating is performed, so that one content is read. A plurality of image data are stored in the apparatus, and there is a problem that storage efficiency is deteriorated.

As a method for solving this problem, for example,
As disclosed in JP-A-11-272654,
A proposal has been made in which the contents of the electronic file document can be easily reflected in the original electronic file document on the paper on which the content of the electronic file document is printed.

In this method, a corrected and corrected document which has been corrected by handwriting on paper is read by a scanner, and the difference between the image information of the original document and the image information of the corrected and corrected document is calculated. Is extracted, and the retouched portion is pattern-recognized and reflected in the original document.

In this method, since only the retouched portion added to the paper is added to the original document, the problem of storing a plurality of image data is solved.

[0008] However, when the original document is updated after reading the contents of the paper which has been rewritten by handwriting or the like with a scanner as described above, for example, information that has already been determined in a fixed format or the like is incorrectly corrected. In addition, there is a problem that the contents of the original document itself can be easily falsified intentionally, and a problem such as security of important information may occur.

[0009]

That is, in the method of updating the document content of the correction and correction portion based on the image information of the original document and the image information of the correction and correction document read by the scanner, a method of updating the document content in a fixed format or the like is used. There has been a problem that the determined information is erroneously corrected or the content of the document itself is intentionally falsified.

Therefore, in the present invention, when updating a document image, there is no need to perform image editing processing or data input processing on the apparatus, and it is not necessary to store multiple layers of image data, and it is efficient. To provide a document image filing apparatus and a document image updating method capable of realizing an updating process and further reliably preventing information or the like not to be updated in original document image data from being updated. It is intended for.

[0011]

In order to achieve the above object, according to the present invention, first image data stored in an image storage means is printed out on a recording medium and output, and the first image data is outputted. The data is printed on the recording medium, the data is corrected, the data is fetched as second image data via the image input means, the first image data is compared with the second image data, and the difference is calculated. The data is extracted, the extracted difference data is added to the first image data, an update process is performed, and the image data is stored again in the image storage means.
If an update processing prohibited area is specified for the image data of, and if the extracted difference data is included in the specified update processing prohibited area, the update processing is not performed in this area. It is characterized by doing.

Further, according to the present invention, the first image data stored in the image storage means is printed and output on a recording medium, and correction is performed on the recording medium on which the first image data is printed. After that, the image data is captured as second image data via the image input means, the first image data is compared with the second image data, and the difference data is extracted. In the document image updating method in which the image data is added to the image data, the update processing is performed, and the image data is stored in the image storage means again, an update processing area is designated for the first image data, and It is characterized in that an update process with the extracted difference data is performed only on the image data.

With the above configuration, when updating the document image stored in the document image filing apparatus, the contents to be retouched and written on a recording medium such as paper are written.
The document image is read by the image input means, compared with the original image data, updated image data is created and stored in the image storage means, so that the document image can be easily updated. Furthermore, if the original image data contains information that the user does not want to be updated, setting an update-prohibited area or an update-permitted area ensures that the information that the user does not want to be updated is inadvertently updated. It is to prevent.

[0014]

Embodiments according to the present invention will be described below with reference to the drawings.

As an embodiment of the present invention, a configuration of a document image filing apparatus that reads a document image (document) by an image input device such as a scanner, registers the document image in a storage device such as a hard disk, and manages the document image will be described.

The document image filing apparatus includes an image input unit 1 such as a scanner for reading a document image as image data, a main storage unit 2 for storing image data read by the image input unit 1 in a memory, an image input unit An image storage unit 3 for storing the image data read by the unit 1 in an external storage unit 4 such as a hard disk; an image reading unit 5 for reading out the image data stored in the external storage unit 4 to the main storage unit 2 as necessary; An image display unit 6 for displaying the image data read to the main storage unit 2 on a screen such as a display monitor; an image printing unit 7 such as a printer for printing the image data read to the main storage unit 2 on paper; Is provided.

Further, in the document image filing apparatus, the image data as the original image of the image data B read by the image input unit 1 is read from the external storage unit 4 by the image identification unit 8 and the image input unit 1. A position correction unit 9 that compares two pieces of image data of the read image data B and the image data A read out as the original image data of the image data B, thereby performing image registration. Difference extracting unit 10 for extracting a portion to be written as difference information, an image generating unit 11 for superimposing the extracted difference information on image data A to generate updated image data, and a document stored in external storage unit 4. An area specifying unit 12 for setting an area for which updating of image content is prohibited, and writing of handwritten characters or the like is not performed in the prohibited area set by the area specifying unit 12. Whether it is determined, it has a configuration that includes a warning generator 13 for issuing a warning when a write has been made.

A method of updating image data in the document image filing apparatus having such a configuration will be described in detail with reference to a flowchart shown in FIG.

In the document image filing apparatus of the present invention, the user or the like freely writes and corrects a document image printed on a recording medium such as paper by the image printing section 7 and writes the document image. The document image is updated by being read by the image input unit 1 again.

The image printing unit 7 read from the external storage unit 4
The image data A of the document image printed on the recording medium is corrected by handwriting or the like by handwriting, and the written document image is read as image data B in the image input unit 1 (ST201). .

Next, a document image that is the basis of the image data B read by the image input unit 1 is designated from among the image data stored in the external storage unit 4 (ST202), and this image data A is designated. Read from the external storage unit 4 (ST20)
3).

As a specific method of specifying the image data A, there is a method in which the user specifies using the file name or the ID of the document image. In this case, it can also be realized by extracting the ID of the document image from the read image data B using character recognition. Alternatively, there is a method in which image data stored in the external storage unit 4 is reduced and displayed on the image display unit 6 in the form of a list display, from which the user selects.

Next, the position of the designated image data A and the image data B read from the image input unit 1 are aligned by the position correction unit 9 (ST304). As a positioning method, a specific ruled line, mark, or character is extracted from the image data, a location that can be determined to be the same is extracted, and the position of the image data B is corrected so that the location matches.

Here, the position correction processing of the image data will be described using the specific example shown in FIG. For example, when image data is input in the image input unit 1, by taking in black paper under the document image and taking it in, the data of the document image is converted into a clear form as shown in an image 131. As described above, when the same document image is re-input, the document image can be converted into data with a sharp edge of the document image as shown in the image 132 at all times.

For example, four vertices of the document image are extracted from the image data 131 and 132, respectively. From the image data 131, the vertices 133a, 133b, 133
c and 133d are extracted, and vertices 134a, 134b, 134c and 134d are extracted from the image data 132. As a method of the position correction processing, the vertex 134a is set to the vertex 1
At the position of 33a, the vertex 134b is at the position of the vertex 133b, the vertex 134c is at the position of the vertex 133c,
Interpolation processing is performed so that d moves to the position of the vertex 133d.

As another method, first, a parallel movement is performed to move the position of the vertex 134a to the position of the vertex 133a, and then the inclination of the straight line connecting the vertex 134a and the vertex 134b connects the vertex 133a to the vertex 133b. An affine transformation formula that performs rotation processing so as to match the inclination of the straight line, and then performs scaling processing so that the position of the vertex 134d moves to the position of the vertex 133d is obtained, and the conversion processing is performed using the obtained affine transformation equation. , The position correction process can be performed.

However, when it is impossible to input an image with black paper as an underlay, information appearing inside a document image can be used. For example, when ruled line information is used, the range of the ruled line is obtained, and correction processing can be performed so that the ranges of the two document images with respect to the image data match.

Specifically, for the image data 131,
In order to extract the ruled line and determine the range exerted by the ruled line, an upper left point 135a, an upper right point 135b, a lower left point 135c, and a lower right point 135d are respectively obtained. , Top left point 136
a, an upper right point 136b, a lower left point 136c, and a lower right point 136d are obtained. In the position correction processing, the correction processing is performed so that the ranges of the image data of the two documents coincide with each other in the same manner as when the four vertices are obtained by using black paper as an underlay.

The difference extraction unit 11 performs an inter-image operation of subtracting the image data A from the image data B having been subjected to the position correction as described above, and replaces the portion written from the image data A into the image data B with the difference data C. (ST20
5). At this time, the noise component can be removed by performing the small component removal processing on the difference data C.

Here, using the specific example shown in FIG. 4, as an example of a specific method of removing a noise component performed in the difference processing, a simple component removing method as a method of removing a noise component will be described. This will be specifically described. First, a labeling process is performed on the difference data C extracted in step ST205, and the number of pixels is calculated for each connected component present in the difference data C. When the number of pixels is smaller than a set number (for example, 10 pixels), the connected component is deleted from the difference data C, so that a noise component can be removed.

However, in practice, even if the position correction processing is performed, a slight displacement occurs, and the difference data 14 shown in FIG.
When the portion 142 surrounded by the dashed line 1 is enlarged, as shown in the partial image 143, a part of the character outline or the ruled line may remain. These are caused by incomplete positioning in the above-described position correction processing or by the influence of distortion in image input. In order to cope with this, a noise component is removed by performing a narrowing process by a filter process to obtain an image 144. Here, the narrowing process is, for example, 5
This can be realized by a process of setting a white pixel when any of the pixels is white with a × 5 mask. Further, in order to obtain an image close to the original difference data with respect to the required pixels, the image 145 can be obtained by performing a thickening process by the same filter processing. The thickening process can be realized by, for example, a process of setting a black pixel when any pixel is black by using a 5 × 5 mask.

Next, the data of this part is deleted from the difference data C using the information previously set as the area where the update of the image data A is prohibited in the area specifying section 12 (ST206). Finally, the difference data C from which the information of the update prohibited area has been deleted is superimposed on the image data A, the image data A is updated, and new image data D is created by the image generation unit 11 (ST207). By storing D in the external storage unit 4 again as image data A (ST208), the document image is updated.

Here, the update processing when the prohibited area is set in the area specifying section 12 will be described in detail using a specific example of the document image shown in FIG. First, the update prohibition area 42a is set by the area specifying unit 12 for the document image data 41 registered in the document image filing apparatus, as indicated by hatching in the figure. Next, this image data 4
Write the content to be added and corrected in the document on which 1 is printed.

In this case, as shown in the image data 43, it is assumed that the current information is corrected together with the new update information with the double line, as shown by the image data 43. The image data 43 is read by the image input unit 1 again. With respect to the read image data 43, the original image data 41 of the image data 43 is read from the external storage unit 4 as the same document image. Next, the image data 43 is converted to the image data 4
1 to correct the position and inclination using character information such as ruled line information and titles, and use the corrected image data to obtain a difference from the image data 41 to correct the correction. The image data 44 of only the selected portion is obtained. At this time, it is also possible to remove a noise component or the like due to a slight displacement of the ruled line position.

Here, the difference extraction unit 10 performs an inter-image operation between the retouched image data 44 and the update prohibition area 42, and thereby the pixels included in the update prohibition area 42 are converted into image data. 44, and obtain difference image data 45 for updating. Difference image data 4 for this update
5 is superimposed on the image data 41, and finally, the image generation unit 11 can obtain updated image data 46 in which information corrected and added is added to an area other than the update prohibited area 42.

In the above description, contents such as corrections are written on a recording medium such as paper obtained by printing image data of a document image stored in the external storage unit 4.
The example in which the image data is updated by reading in the image input unit 1 has been described again. However, the image data stored in the external storage unit 4 is not printed, but the original data is directly written into the original document and the image data is updated. It is also possible to update the image data by reading in step (1).

In the document image filing apparatus described in the above embodiment, when updating the contents of image data A which is a document image stored in this apparatus,
A document image in which the content to be corrected and written by handwriting or the like is written on a recording medium such as paper is again taken in from the image input unit 1 such as a scanner, and the difference data is superimposed on the original image data A. In addition, it is possible to update the contents of the document image.

By updating the document image in this manner, the user does not need to edit the image or input the data on the computer. Noise components can be suppressed with respect to paper deterioration and fluctuations at the time of input.

When the image data A is updated, information that the user does not want to be updated in the image data A is set as an update prohibited area by the area designating unit 12.
It is possible to prevent such information from being updated unnecessarily, thereby preventing the already determined information or the like from being erroneously corrected or intentionally falsified.

In the above embodiment, the area designating section 1
Although the area 2 sets an area where updating of the stored document image is prohibited, the area designating unit 12 may set an area where the content of the document image is allowed to be updated.

In this case, the image update processing in the update allowable area set by the area specifying unit 12 will be described using a specific example shown in FIG.

First, an update allowable area 42a is set for the document image data 41a stored in the external storage unit 4 of the document image filing apparatus by the area specifying unit 12 as shown by oblique lines in the figure. Next, the image data 41a
Is written in the printed document image, and this is read again by the image input unit 1. This image input unit 1
It is assumed that the image data 43a read in step (1) has the current information corrected together with the new update information with a double line. Further, the image data 41a stored in the external storage unit 4 is read from the image data 43a as an original document image.

Next, the image data 43a is converted to the image data 41.
The position correction is performed by the position correction unit 9 in accordance with “a”, the position and inclination are corrected using character information such as ruled line information and a title, and the difference from the image data 41a is calculated. The data 44a is obtained. Here, by performing an inter-image operation between the image data 44a and the update allowable area 42a, pixels included in areas other than the update allowable area 42a are deleted from the image data 44a, and the differential image data 45a for update is deleted. Thus, the image data 45a is superimposed on the image data 41a, and the updated image data 46a is created by the image generation unit 11.

With this configuration, the area designating section 1
It becomes possible to add, as update information, only the content that has been modified and described within the range of the update allowable area set in Step 2.

Next, when update information such as correction is written in an area where update processing is prohibited for the document image stored in the external storage unit 4, a warning message to that effect is given to the user. A method of updating the document image after the display will be described with reference to the flowchart shown in FIG.

Image printing unit 7 read from external storage unit 4
In the image data A of the document image printed on the paper, the paper on which the correction and the like are written is read as the image data B in the image input unit 1 (ST30).
1).

The original image data of the image data B is designated from among the image data stored in the external storage unit 4 (S
T302), the image data A is read from the external storage unit 4 (ST303). Next, the position correction of the image data A and the image data B is performed by the position correction unit 9 (ST304),
Further, based on an inter-image operation of subtracting image data A from image data B having been subjected to position correction, a portion added to image data B from image data A is extracted from difference extracting unit 10 as difference data C (ST305). ).

At this time, when an area for which the update of the image data A is prohibited is set in the area specifying section 12, the warning generating section 13 determines whether or not the difference data C is included in the update prohibited area. (ST306). As a result, when it is determined that the difference data C is included in the update prohibited area, the warning generation unit 13 notifies the user that the update information has been written in the update prohibited area. A warning is issued to call attention (ST307). As an example of the warning display, for example, as shown in FIG.
A message 52 indicating that the update information has been written in the prohibited area is displayed, and the corresponding portion 53 of the image data is highlighted by, for example, being highlighted.

Then, the user is confirmed (ST30).
8) If the user refuses to update all the correction information described in the prohibited area, the user ends the update process (ST).
309). When only updating the information in the update prohibited area is not performed, the data of this part is deleted from the difference data C using the information of the prohibited area set by the area specifying unit 12 (ST310). Difference data left in this way
A new image data D for updating the image data A is created by superimposing C on the image data A (ST311),
The image data D is stored again in the external storage unit 4 as the image data A (ST312), thereby completing the document image update process.

When the contents of the document image stored in the external storage unit 4 are updated by such a method, the document image written on the paper is taken in again from the scanner 1 and is stored in the original image data A. On the other hand, the image data to be updated can be created by superimposing the difference data, but the information that the user does not want to update the image data A is provided with a prohibited area. The details of writing to the prohibited area are presented to a certain filing administrator or the like, and an update process can be performed according to a user's instruction.

Next, when the document image stored in the external storage unit 4 is updated, if a blank line or the like is written in the written document image, a corresponding portion of the image data is deleted. A description will be given, with reference to the flowchart shown in FIG. 9, of a document image update processing method for performing a deletion process or the like.

The image printing unit 7 read from the external storage unit 4
The written paper is read again as image data B in the image input unit 1 with respect to the document image printed in (ST401).

The original image data of the read image data B is designated from among the image data stored in the external storage unit 4 (ST402), and the image data A designated as the original image data is extracted (ST403). ). As a specific method, a user can input a file name or a document image ID.
There is a way to specify using. In this case, the ID of the document image is read from the read image data B using character recognition.
Can also be realized by extracting In addition, the stored image data can be reduced and displayed in a list on the image display unit 6, from which the user can select.

Next, the position of the image data A extracted as the original document image and the image data B read by the scanner 1 are aligned by the position correction unit 9 (ST404). As a method of alignment by the position correction unit 9, a specific ruled line, mark, or character is extracted from the image data, a location that can be determined to be the same is extracted, and the image data B is extracted so that the location matches. Then, the position is corrected.

Further, the image data B subjected to the position correction
The image data A is subtracted from the image data A, and a portion added to the image data B from the image data A is extracted as difference data C (ST405). At this time, by performing the small component removal processing on the difference data C,
Noise components can be removed.

Next, a region having a specific image feature (for example, a strike-through line or a Batten mark) is extracted from the extracted difference data C (ST406). At the time of this extraction, a line segment is extracted from the image data of the difference data C, and the presence or absence of an erasure line or a Batten mark is determined based on the line segment information. Ask for. Here, if it is determined that there is a characteristic region, the image data A is processed according to the image characteristic (ST407).

For example, as shown in FIG. 10, it is assumed that there is image data 62 in which writing has been performed on image data 61 already stored. Difference data 63 is obtained from the image data 62, and specific image features (double line and batten mark) are obtained for the difference data 63. A line segment is extracted from the difference data 63, and these characteristic regions are extracted from a combination of the extracted line segment information to obtain a double line region 64 and a batten mark region 65. By applying the obtained characteristic region to the original image data 61 (66), a mask region 67 for the double line region and a mask region 68 for the batten region are obtained. , The updated image data 69 can be created.

Thereafter, new image data D to be updated is created by deleting the characteristic region portion from the difference data C in the image generation unit 11 and superimposing the image data A on the processed image data A (ST408). ), This image data D
Is stored in the external storage unit 4 again as the image data A to register the update information (ST40).
9).

According to the method of updating the image, the external storage unit 4
If you want to cancel or make major corrections to the image data stored in the, use the characteristic marks such as double strikethrough lines and Batten marks to process the original image data for that part, This makes it possible to easily update a document image.

The present invention is not limited to the above-described embodiment, but can be implemented in various modifications without departing from the gist thereof.

[0061]

As described in detail above, when updating a document image stored in the document image filing apparatus, contents such as corrections and the like are written on the paper, and this document image is input to the image input unit. By updating the document image, the updated image data is created by comparing the original image data with the original image data, and the updated data is stored in the apparatus, thereby easily updating the document image. Such a document image update processing method eliminates the need for the user to edit images and input data on the apparatus, and eliminates the need to perform image input many times. Components and the like can be suppressed.

Further, when the information to be updated is included in the original image data, by setting an update prohibited area or an update allowable area, the information to be updated is changed unnecessarily. This can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a document image filing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a document image data update processing method according to the present invention.

FIG. 3 is a diagram showing a specific example of a position correction process of image data according to the present invention.

FIG. 4 is a diagram showing a specific example of noise component removal from image data according to the present invention.

FIG. 5 is a diagram for specifically explaining a document image data update process of the present invention.

FIG. 6 is a diagram for specifically explaining a document image data update process of the present invention.

FIG. 7 is a flowchart illustrating a document image data update processing method according to the present invention.

FIG. 8 is a diagram for specifically explaining a document image data update process of the present invention.

FIG. 9 is a flowchart illustrating a document image data update processing method according to the present invention.

FIG. 10 is a diagram for specifically explaining a document image data update process of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Image input part 2 ... Main storage part 3 ... Image storage part 4 ... External storage part 5 ... Image readout part 6 ... Image display part 7 ... Image printing part 8 ... Image identification part 9 ... Position correction part 10 ... Difference extraction part 11 ... image generation unit 12 ... area designation unit 13 ... warning generation unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 1/387 H04N 1/387 (72) Inventor Akihiro Uda 1st, Komukai Toshiba-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture. F-term in Toshiba R & D Center (reference) 5B050 AA10 BA10 BA16 EA06 EA13 EA18 EA19 FA19 5B075 ND06 ND07 NR02 NR20 UU06 5C076 AA02 AA12 AA14 BA02 BA06 CA02 5L096 DA01 DA03 EA14 FA03 FA19 GA08

Claims (11)

[Claims] A first image data stored in the image storage means, which is printed on a recording medium and output, and the recording medium on which the first image data is printed is subjected to additional correction; The first image data is captured as second image data via an image input unit, the first image data is compared with the second image data, and the difference data is extracted. The extracted difference data is stored in the first image data. An update process is performed by adding the update process to the image data and stored in the image storage unit again. The update process prohibition region is designated for the first image data. A document image updating method, wherein when the extracted difference data is included, an update process is not performed in this area. 2. The document image updating method according to claim 1, wherein when the extracted difference data is included in the update processing prohibited area, a warning to that effect is issued. 3. The method according to claim 1, wherein the first image data stored in the image storage means is printed out on a recording medium and output. The first image data is captured as second image data via an image input unit, the first image data is compared with the second image data, and the difference data is extracted. The extracted difference data is stored in the first image data. When the update processing is performed by adding the difference data to the first image data, the extracted difference data is added to the image data. A document image updating method, comprising: extracting image data indicating a specific image characteristic from a first image data; and editing the first image data according to the extracted image characteristic. 4. The method according to claim 1, wherein the first image data stored in the image storage means is printed out on a recording medium and output. The first image data is captured as second image data via an image input unit, the first image data is compared with the second image data, and the difference data is extracted. The extracted difference data is stored in the first image data. In a document image updating method in which an update process is performed by adding an update process to image data and stored in the image storage unit again, an update process area is designated for the first image data. A document image updating method for performing an updating process on the extracted difference data only with respect to the image data. 5. An image input means for inputting image data, a storage means for storing the image data input by the image input means, and updating the contents of the first image data stored in the storage means. Printing means for printing out on a recording medium in order to print the image data by the printing means, and applying the second image data which has been retouched as update information to the recording medium via the image input means. Image extracting means for capturing and comparing the first image data with the second image data to extract the difference data; and adding the difference data extracted by the image extracting means to the first image data Image updating means for performing update processing to be performed and storing the updated image data in the storage means; area designating means for designating an update processing prohibited area for the first image data; When the difference data extracted by the image extracting means is included in the updated update prohibition area, processing means for not performing the updating processing by the image updating means. Document image filing device. 6. When the difference data extracted by the image extracting means is included in the update processing prohibited area specified by the area specifying means, the processing means issues a warning to that effect. 6. The document image filing apparatus according to claim 5, further comprising a warning unit for performing the warning. 7. Image input means for inputting image data, storage means for storing the image data input by the image input means, and updating the contents of the first image data stored in the storage means Printing means for printing out on a recording medium in order to print the image data by the printing means, and applying the second image data which has been retouched as update information to the recording medium via the image input means. Image extracting means for capturing and comparing the first image data with the second image data to extract the difference data; and adding the difference data extracted by the image extracting means to the first image data Image updating means for performing an updating process to be performed and storing the image data in the storage means, wherein the image updating means extracts image data indicating a specific image feature from the extracted difference data. A feature extraction means, in accordance with the image features extracted by the feature extracting means, the image processing means and the document image filing apparatus characterized by comprising a for editing said first image data. 8. An image input means for inputting image data, a storage means for storing the image data input by the image input means, and a memory for updating the first image data stored in the storage means. A printing means for printing out on a recording medium, and fetching, via the image input means, second image data obtained by making corrections as update information on the recording medium on which the image data is printed by the printing means, Image extracting means for comparing the first image data with the second image data to extract the difference data, and updating the difference data extracted by the image extracting means to the first image data Image updating means for performing processing and storing the result in the storage means; area designating means for designating an update processing area for the first image data; Only for the region of image data, the document image filing apparatus characterized by comprising a processing means for performing update processing by the image updating means. 9. A recording medium which captures first image data via image input means, stores the first image data in image storage means, and has the first image data read by said image input means. The above was updated and revised as the second information
The image data is captured again via the image input means, and the first image data stored in the image storage means is compared with the second image data captured from the image input means. Extracting difference data, adding the extracted difference data to the first image data, performing an update process, and storing the updated difference data in the image storage unit. A document wherein a prohibited area is specified, and when the extracted difference data is included in the update processing prohibited area specified in the area, update processing is not performed in this area. Image update method. 10. A recording medium which captures first image data via image input means, stores the first image data in image storage means, and has the first image data read by said image input means. The above was updated and revised as the second information
The image data is captured again via the image input means, and the first image data stored in the image storage means is compared with the second image data captured from the image input means. In a document image updating method of extracting difference data, adding the extracted difference data to the first image data, performing an update process, and storing the updated image data in the image storage unit again, A document image updating method, wherein an update processing area is designated by using the extracted difference data, and only the image data in the designated update processing area is updated. 11. A recording medium which captures first image data via image input means, stores the first image data in image storage means, and has the first image data read by said image input means. The above was updated and revised as the second information
The image data is captured again via the image input means, and the first image data stored in the image storage means is compared with the second image data captured from the image input means. Extracting the difference data, adding the extracted difference data to the first image data, performing an update process, and storing the difference data again in the image storage unit, wherein the difference data is stored in the first image data. When performing the update process with addition, image data indicating a specific image feature is extracted from the extracted difference data, and the first image data is edited according to the extracted image feature. A document image updating method, characterized in that: