JPH0640342B2 - Image editing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an image editing apparatus capable of effectively performing image editing such as additional writing while superimposing a plurality of original images on a display.

[Technical background of the invention and its problems]

Recently, with the development of information processing technology, computerization of office work has been promoted. As a part of this, the conversion of document images into electronic files has received a great deal of attention.

To convert this document image into an electronic file, a paper file, which is the main character in the office, is electronically read by inputting, for example, a drawing image written on paper by a scanner, and the electronic image data is filed in a storage device. It is a thing. At this time, it is necessary to correct the filed image data and re-register it, or to correct and output the image data. Therefore, how to efficiently perform such correction processing of image data is an important issue.

Note that the image data correction processing includes, for example, additional writing of image data by handwriting, additional writing processing of character patterns and graphic patterns, enlargement / reduction processing of image data,
It includes image rotation processing, cut-and-paste processing by area designation, and the like.

An apparatus that is responsible for such image correction processing is an image editing apparatus, and is configured as shown in FIG. 7, for example. The basic configuration of this image editing apparatus will be briefly described.
Controls the operation of each unit described later through the system bus 2. The CPU 1 operates by setting an operation program area and a variable area on the RAM 3. Then, the CPU 1 stores management information regarding image data in the hard disk 4 via the system bus 2 and inputs coordinate information necessary for image editing processing from the tablet 5.

The first and second address generators 6 and 7 which operate under the control of the CPU 1 generate address data respectively, and the address data are sent to the display memory (DM) 10 and page memory (PM) via the address buses 8 and 9. 11 are given respectively.

The display memory 10 stores image data to be displayed on the display (CRT) 12, and also has a page memory.
Reference numeral 11 stores a plurality of image data used for image editing in page units.

The display memory 10 and the page memory 11 are
And the enlargement / reduction unit 1 via the second data buses 18 and 19.
3, image calculation unit 14, scanner I / F15, printer I / F1
6, and an optical disk I / F 17 are connected respectively. Image data is mutually transferred between the respective units via the first and second data buses 18 and 19, and the transfer of the image data is mutually carried out via the control bus 20 connecting the respective units described above. It is performed by establishing synchronization with.

Here, the enlarging / reducing unit 13 is for enlarging / reducing the image data transferred via the data buses 18 and 19 under the control of the CPU 1, and the image computing unit 14 is for the image data. It executes logical operations (negative, sum, product, etc.). This enlarging / reducing unit 13 and image calculation unit
The image editing processing is performed by the processing on the image data by 14 and. The scanner I / F 15 is a scanner
The image data read by 15a is input, and the printer I / F 16 prints out the image data via the printer 16a. And optical disk I
The / F17 is connected to an optical disk 17a as an external memory and inputs / outputs image data.

In the image editing apparatus configured as described above, for example, image data read and input by the scanner 15a or image data read from the optical disk 17a is stored in the page memory 11
The images (pages) transferred to the respective predetermined image areas of
Stored in units. Then, it is transferred from the page memory 11 to the display memory 10 and displayed on the CRT 12. At this time, the image data read from the page memory 11 is enlarged / reduced by the enlargement / reduction unit 13 as needed, and then stored in the display memory 10. The CRT 12 displays the image by reading the image data stored in the display memory 10 at a predetermined cycle.

Therefore, when displaying a plurality of images on the CRT 12, the image data of the plurality of images stored in the page memory 11 is sequentially written in a predetermined address area of the display memory 10. Specifically, each image data is displayed in the display memory 10 in correspondence with the display position on the CRT 12.
By writing to the above prescribed address area respectively,
The images will be displayed on the CRT 12, respectively.

However, when the image data whose display is controlled in this way is corrected, the following problems occur. That is, compared to the size of the image data stored in the page memory 11,
The image display area (image display area) of the display 12 is often small. Therefore, as shown in FIG. 8, the original image A on the page memory 11 is reduced and displayed on the display memory.
The image is transferred to 10, the reduced image B is displayed on the display 12, and the display image B is subjected to image correction processing on the display memory 10.

However, when the image B reduced and displayed in this way is modified, the modified image C is created on the display memory 10, and the original image A on the page memory 11 is modified based on the modified image C, As shown in the corrected image D, a large image distortion (so-called jaggedness) E due to the quantization error occurs in the diagonal line, for example, due to a calculation error associated with the enlargement processing of the corrected image C. This image distortion can be dealt with by, for example, interpolation processing, but it is very difficult to perform the processing.

Further, in addition to the image distortion occurring in such a diagonal line, when the correction target area F is designated and the correction processing is performed as shown in FIG. 9, the image data of the correction image area G is enlarged. When the image H is inserted into the corresponding area of the original image A on the page memory 11 and connected, the image data connecting portion I is generated due to the quantization error accompanying the enlargement processing.
Is likely to shift.

Such image distortion and image data shift are unavoidable when the image data transferred between the page memory 11 and the display memory 10 is subjected to enlargement / reduction processing, and the original image accompanying the correction processing It is a major cause of quality deterioration.

[Object of the Invention] The present invention has been made in view of such circumstances, and an object thereof is to correct image data of an original image stored in a page memory without degrading the quality of the image. An object of the present invention is to provide an image editing apparatus that can be effectively performed.

[Outline of Invention]

The present invention reduces and enlarges image data between a page memory for storing original image data and a display memory for storing image data to be displayed on a display, and transfers the image data to the display memory for display and display. When correcting the corresponding original image data in the page memory according to the image data corrected in the display memory, the image data stored in the display memory is copied and saved in the same size and is corrected. The difference between the image data on the display memory and the image data copied and stored is calculated, and only the corresponding portion of the original image data on the page memory is corrected according to the difference between the image data.

〔The invention's effect〕

Thus, according to the present invention, after the image data transferred from the page memory to the display memory is copied and saved in the same size, it is subjected to the image correction processing, and the image data corrected on the display memory and the above-mentioned copy and saved. The difference from the image data is obtained. Since the image data on the page memory is modified only for the modified portion of the image indicated by the difference data, the image data other than the image area that is the modification target of the original image on the page memory is saved as it is. To be done.

Therefore, the quality of the original image does not deteriorate due to the image correction process, and the image correction process can be performed easily and effectively.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings.

This apparatus is basically constructed as shown in FIG. 7, and is characterized in that the image data is corrected according to the processing procedure shown in FIG.

That is, in this apparatus, a plurality of original images, for example, the second image
As shown in the figure, tables are managed on the hard disk 4, and a plurality of original image data to be edited are stored in the page memory 11 as shown in FIG. 4, and the image data are transferred to the display memory 10. Then, as shown in FIG. 3, it is displayed on the display 12.

Note that table management for a plurality of original images is performed by individually registering management information regarding each image data by the image data number as illustrated in FIG. The storage area (storage start address) of the image data on the page memory 11 and the size (dimension: xn, yn) of the image are stored for each original image, and the display of the image data on the display memory 10 is performed. The (storage) area is stored as display position information (xi, xe, yi, ye), respectively, and the management table is configured by adding priority information indicating the stacking order when a plurality of images are stacked and displayed. .

The procedure of the image correction process shown in FIG. 1 will be described. First, the image data used for the image data correction is enlarged / reduced (including the same size) from the page memory 11 and transferred to the display memory 10. Then, the image data transferred to the display memory 10 is copied and saved in the same image size (step a). The copy storage of the image data is performed by simultaneously writing the image data to be written in the display memory 10 to another storage area on the page memory 11.

The same image data as the image data written in the display memory 10 in this manner, for example, after being copied and stored in the page memory 11, is stored in the display memory 10 and with respect to the image displayed on the display 12. A correction process is performed (step b). The correction process of the image data is performed by inputting handwritten data via the tablet 5 or another method.

Then, when the correction processing of the image data on the display memory 10 is completed, the logic between the corrected image data on the display memory 10 and the image data copied and stored on the page memory 11 in the image calculation unit 14 is given. The calculation is performed and the correction processing portion is extracted (step c). When the image data is given as a binary image, the extraction of the image correction portion by this logical operation is performed by an exclusive OR processing or the like.
By this processing, for example, a black addition area and a white erasing area for the original image transferred to the display memory 10 are obtained.

After that, the image data of the correction applicable area is restored to the original image size that has been subjected to the enlargement / reduction (including the same size) processing and is transferred to the page memory 11. Then, the addition processing for the original image data on the page memory 11 is performed on the black addition area (step d), or the erasing processing for the original image data on the page memory 11 for the white deletion area is performed (step e). ).

If the correction process of the image data on the display memory 10 is interrupted midway, the image data is retransferred from the page memory 11 to the display memory 10 to restore the image.

The above is the characteristic image correction processing procedure in this apparatus.

This image correction process will be described in more detail with reference to FIG. 5. The image A to be corrected is reduced from the page memory 11 and is displayed as a reduced image B on the display memory.
When it is stored in 10, the reduced image B is simultaneously stored in predetermined image areas on the page memory 11 as copy-stored images K1 and K2, respectively. These two copy save images K
1 and K2 are prepared to separately obtain the black addition portion and the white deletion portion for the reduced image B.

When the reduced image B stored in the display memory 10 is interactively subjected to image correction processing to obtain the corrected image C, the image data obtained by inverting the copy-save image K1 in black and white and the corrected image are obtained. AND with C is calculated,
The corrected partial image L1 of the black addition area is obtained. Similarly, the logical sum of the image data obtained by inverting the copy-saved image K2 in black and white and the corrected image C is obtained, and the corrected partial image L2 of the white erase area is obtained.

Then, the corrected partial image L1 is enlarged to the same image size as the original image A, and the enlarged and corrected image is logically ORed with the original image A on the page memory 11 and added to the original image A. Only the data of the black image portion is added to the original image A to obtain the modified original image D1.

Further, since the white erased area exists for this image as described above, the corrected partial image L2 is enlarged to the same image size as the original image A, and the enlarged corrected image is stored on the page memory 11 as the original image. If the logical product is added to the image A (the modified original image D1 with the black area added) and added, only the data of the white image portion erased by the image modification is the original image A (the modified original image with the black area added). The modified original image D2 is obtained by being erased from D1).

By such image correction processing, the original image A
The image data other than the portion to be corrected is saved as it is, and only the image data of the corrected portion is rewritten.

Therefore, unlike the prior art, the quality of the original image data does not deteriorate due to the influence of the quantization error associated with the enlargement / reduction processing during the transfer between the display memory 10 and the page memory 11. Then, since only the image data of the corrected portion is corrected on the page memory 11, the effective correction processing of the original image data is performed here.

In the example described above, the copy saved image of the reduced image B is K1, K
Two sheets were prepared as 2, but only one sheet may be prepared as shown in FIG.

In this case, the black added partial image L1 is obtained by obtaining the exclusive OR of the copy saved image K and the corrected image C, and the image data obtained by inverting the black added partial image L1 in black and white and the corrected image C are obtained. It suffices to calculate the logical sum and obtain the white erased partial image L2. Even in this case, the original image A on the page memory 11 can be effectively modified as in the example shown in FIG.

As described above, according to the present invention, the image data stored in the display memory 10 is copied and saved with the same image size,
Only the image data of the corrected portion is obtained by the logical processing of the image corrected in the display memory 11 and the image stored in copy, and the page memory 11 is obtained according to this image data.
Since the original image above is corrected, it is possible to effectively correct only the corrected portion without degrading the quality of the original image.

That is, the image data is displayed in the display memory to correct the image.
10 and the corrected image data is transferred from the display memory 10 to the page memory 11 for image correction processing, but this causes image distortion, for example, in the shaded area of the original image, or image connection. It does not cause a problem such as a deviation in the bent portion.

Therefore, practically great effects such as effective image correction can be achieved under simple control.

The present invention is not limited to the above embodiment. For example, the basic configuration of the device is shown in FIG. 7, but the bus configuration and the like may be determined according to the specifications of the device. Further, not only the transfer of image data is performed by enlarging / reducing, but the same is applicable to the case of transferring at the same size. In short, the present invention can be variously modified and implemented without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a diagram showing a flow of image correction processing in an embodiment apparatus of the present invention, FIG. 2 is a diagram showing a configuration example of an image management table in the embodiment apparatus, and FIG. 3 is an image superposition in the embodiment apparatus. FIG. 4 is a diagram showing a display example, FIG. 4 is a diagram showing a storage example of a plurality of image data in a page memory, and FIGS. 5 and 6 are diagrams showing a concrete flow of image correction processing in the embodiment apparatus, respectively. FIG. 7 is a basic schematic configuration diagram of an image editing apparatus, and FIGS. 8 and 9 are diagrams for explaining a flow of image correction processing and problems thereof in a conventional apparatus, respectively. 1 ... CPU, 3 ... RAM, 4 ... Hard disk,
5 ... Tablet, 6,7 ... Address generator, 10 ...
Display memory, 11 …… Page memory, 12 …… Display, 13 …… Enlargement / reduction section, 14 …… Image calculation section.

Claims (3)

[Claims] 1. A page memory for storing original image data, a display memory for storing image data to be displayed on a display, and an image transferred between the display memory and the page memory by reducing and enlarging the image data. A processing unit and an image correction processing unit for correcting the image stored in the display memory and displayed on the display are stored, and the image is stored in the display memory before the display image is corrected by the image correction processing unit. The copied image data is copied and saved, the difference between the image data on the display memory that has been corrected by the image correction processing unit and the image data that has been copied and saved is obtained, and the page is read according to the difference between the image data. An image editing apparatus characterized by modifying original image data stored in a memory. 2. The image editing apparatus according to claim 1, wherein the correction processing of the display image by the image correction processing section is performed interactively. 3. The image editing apparatus according to claim 1, wherein the image data comprises binary image data, and the processing for the image data is performed by a logical operation.