JPH0719296B2 - Image processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention displays a document image retrieved by an optical disk or a document image input from a scanner or the like on a display, and the displayed document image. To enlarge, reduce, rotate,
Alternatively, the present invention relates to an image processing method capable of performing processing such as copying and moving, and particularly to an image processing method useful when performing additional writing processing such as handwriting on the displayed document image.

(Prior Art) Under the name of OA, office work is being made more efficient, and paper files are being digitized. In the electronic filing apparatus, since image data such as a document is stored in an external storage device such as an optical disk, it is not necessary to prepare a large space for storing a paper file as in the conventional case. Since it is easy to add a keyword or the like, it is possible to register and search in a classification suitable for the system of each document, which can improve the processing speed of search and registration. And, in particular, although the drawings etc. have been digitized in advance, the drawings registered in the electronic file are searched and the drawings are corrected,
Accurately performing processing such as registration or printout is an important role of the image editing apparatus.

Normally, the page memory (hereinafter referred to as PM
It is provided with a display memory (hereinafter referred to as DM). PM is a work memory that temporarily stores image data, and stores image data input from a scanner, an optical disk, or the like. The DM is a memory for displaying on the CRT, and the image data in the PM is processed by enlarging, reducing, rotating, etc., and then transferred to the DM to be processed by enlarging, reducing, etc. The data is displayed on the CRT. In other words, the original image data is in the PM,
Original data in the PM is appropriately signal-processed (data may be displayed as it is without being processed), and the data is laid out (arranged) on the DM.

Among the correction devices in this image editing device, there are additional writing by handwriting, erasing, writing of character patterns / graphic patterns, etc. However, when additional writing is performed by handwriting on image data, normal handwriting ends. Until then, the writing is performed only on the DM, and when the handwriting is completed, the writing is performed on the original image data on the PM. This is to make it possible to restore the original image even if the handwriting process is interrupted, and to avoid speeding down by writing simultaneously on both DM and PM.

By the way, in the image editing apparatus, the original image data in the PM is often enlarged or reduced and placed on the DM.
When an additional writing process is added to the above image data by handwriting or the like and the additional written image data is enlarged and the original image data in the PM is updated, the conventional device is shown in FIG. The inconvenience as shown in the figure appears.

That is, in FIG. 6, the original image data in the PM shown in FIG. 6A is reduced at an appropriate reduction ratio and transferred to the DM, so that the reduction as shown in FIG. The displayed data is displayed. For such a display,
Handwriting input (image erasing process) as shown in FIG. 7C is performed, and the image data corrected in this DM is enlarged to a magnification corresponding to the original data of PM, and transferred to PM. It is assumed that the original data in is updated. At this time, in the conventional apparatus, the original data in the updated PM may have a straight line fluctuation in a part of the area as shown in FIG. .

Further, in the example shown in FIG. 7, the original image data shown in FIG. 7A is reduced and displayed on the CRT in the same manner as described above. After designating (shown by a broken line in FIG. 6B), it is assumed that additional writing as shown in FIG. At this time, in the conventional apparatus, when it is attempted to enlarge the additionally written image data to update the original image data in the PM, the updated image data in the PM is as shown in FIG. The image is misaligned.

Such a problem in the conventional apparatus is that the scaling operation of the scaling unit in the image editing apparatus is not a reversible operation, but the image scaling rate is usually
In addition to the integer scaling factor, scaling factors including decimal points such as 2.34544 are also used, and it is practically impossible to perform scaling operation with no calculation error for all such vertical scaling factors. is there.

(Problems to be Solved by the Invention) The present invention has been made in consideration of the above circumstances,
Performs correction processing such as handwriting on the document image,
An object of the present invention is to provide an image processing method capable of reliably preventing inconveniences such as line fluctuations and deviations in the original image data when the image is enlarged to update the original image data. Is.

[Configuration of the Invention] (Means for Solving Problems) Therefore, in the present invention, the image information stored in the first storage means for storing image information is stored in the second storage means and then displayed. An image processing method for performing an additional writing process on the image data provided for display, in the object to be provided, a step of designating a target area of the additional writing,
The first corresponding to the target area specified by this step
Of displaying the image information in the storage means for display at the same size without enlarging / reducing processing, performing additional writing processing on the image displayed by this step, and performing additional writing processing by this step. And storing the obtained image information in the first storage means at the same size without scaling.

(Operation) In the present invention, as shown in FIG. 1, when the handwriting processing is performed, the image data to be corrected by the control of the control means 13 is the image data itself of the second memory (hereinafter referred to as display memory) DM. Rather, it is data obtained by temporarily transferring a required portion (shown by a broken line) of the original image data stored in the first memory (hereinafter referred to as an image buffer memory) PM to the display memory DM at the same size, and Since the original image data is updated by transferring the corrected image data to the required area of the image buffer memory at the same size, even if the scaling process includes a calculation error. , When the stored contents are updated, line fluctuations or line deviations may occur in the original image data in the image buffer memory PM. It can be obtained without the Ku handwritten writing process.

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

FIG. 2 shows a schematic configuration of hardware when the present invention is applied to an electronic filing apparatus.

In such a configuration, the document image data scanned by the scanner 1 is taken into the apparatus through the scanner / printer interface 2, passes through the image data bus DBI, the image bus switching control circuit 3, the memory data bus MDI, and passes through the image buffer memory (page Memory) stored in PM. When the document image data stored in the image buffer memory PM is printed, the document image data is sent to the scanner / printer interface 2 through the reverse route after being subjected to, for example, an appropriate editing process. Printed as a hard copy.

When enlarging or reducing the image data stored in the image buffer memory PM, the image data is enlarged or reduced from the image buffer memory PM via the memory data bus MDI, the image bus switching control circuit 3, and the image data bus DBI. 6 and is scaled to an appropriate vertical scale in the scaling circuit 6, and then stored in the display memory DM through the image data bus DBII, the image bus switching control circuit 3 and the memory data bus MDII in sequence, and further. It will be sent to the display 8 via the display controller 7. When the enlargement or reduction is not necessary, the image is not sent through the enlargement / reduction circuit 6, but is directly sent from the image buffer memory PM to the display memory DM via the memory data bus MDI, the image bus switching control circuit 3 and the memory data bus MDII. Conversely, from the display memory DM to the image buffer memory PM, from the image buffer memory PM to the image buffer memory PM, or from the display memory DM to the display memory.
Images are transferred to the DM in the same manner as described above.

The image is rotated by passing through the vertical / horizontal conversion circuit 9. When writing an image of characters, symbols, figures, etc. in the image buffer memory PM or the display memory DM, the image data is transferred from the character generation circuit 10 to each memory in the same manner as described above.

The compression / expansion circuit 11 compresses or expands the document image data when inputting / outputting the document image data from the optical disk device 12.

The two-dimensional address generators 4I and 4II control access to the image buffer memory PM and the display memory DM, and specifically, address buses ADI and ADI.
An address is supplied to each memory via I.

The CPU 13 and the CPU memory 14 are for controlling the entire device, editing processing, etc. by program control.
15 is an interface for connecting with another CPU system.

The mouse 16 is for pointing an arbitrary point on the display 8, and the CPU 13 fetches point information from the mouse 16 and uses the above-mentioned character generation circuit 10 to display a cursor on the display 8. .

The above description is about the operation of each hardware in the image transfer, and the document image data input from the scanner, the database, or the optical disk device is
Stored in image buffer memory PM, and display memory
The document image is displayed on the display 8 by being transferred to the DM. Also, when transferring images, enlargement, reduction,
It is also possible to rotate, etc., and after the document image data displayed in this way is subjected to editing processing such as cutting and pasting or handwriting, it is transferred to an image output device such as a printer or optical disk device. By doing so, the document is registered.

By the way, in such a configuration, the image data input from the scanner 1 or the optical disk 12 is stored as the original image data in the image buffer memory PM, and is transferred to the display memory DM to be displayed on the CRT. However, these image data are managed by the image data management table in the CPU memory 14.

For example, as shown in FIG.
If three different image data DT ₁ , DT ₂ and DT ₃ are overlaid and displayed, the contents of the management table in the CPU memory 14 are as shown in the table below.

That is, the storage position of the _three image data DT ₁ , DT ₂ and DT _{3 in} the image buffer memory PM, the display position in the display memory DM and the like are managed by this management table. It should be noted that the priorities in the above table indicate the order of superimposing images on the CRT, and in this case, the larger the number, the higher the order on the screen.

Next, a case of performing additional writing processing by handwriting in such a configuration will be described with reference to FIGS. 4 and 5. FIG. 4 is a flow chart showing the additional writing process, and FIG. 5 shows the change of the screen on the CRT according to the above flow chart. Image data is binary in black and white.

First, original image data as shown in FIG. 5 (a) is stored in the image buffer memory PM, and this image data is reduced by the enlargement / reduction circuit 6 and transferred to the display memory DM. Reduced data as shown in) is CRT8
Suppose it was displayed above. Here, when the operator requests an additional writing process by handwriting, the CPU 13 detects this and then requests the operator to specify the handwriting input area. This request causes the operator to
By appropriately operating 16 etc., for example, a desired handwriting input area as shown by a broken line in FIG.
Figure step 100).

Here, the CPU 13 calculates an area (indicated by a broken line in FIG. 5A) on the image buffer memory PM corresponding to this area from the handwritten input area on the designated display memory DM, The original image data in the calculated area is transferred to the display memory DM at the same size (step 110). As a result, C
As shown in FIG. 5 (d), only the original image data in the area on the image buffer memory PM corresponding to the designated handwriting input area will be displayed on the RT8 in the same size. The handwriting input process is performed on this display (step 120).

Here, it is assumed that the display data on the CRT (DM) is as shown in FIG. 5 (e) by the addition and deletion processing by handwriting on the CRT by the operator. If the operator requests an interruption during this handwriting process (step 13
0), the CPU 13 transfers the original image data in the image buffer memory PM to the display memory DM at the original reduction ratio (in this case, reduced), and ends the additional writing process by handwriting. In this case, the image data shown in FIG. 5 (b) will be displayed again on the CRT.

However, if a signal indicating the end of handwriting processing is input from the operator without the operator's interruption request, the CPU1
3 is the display memory D corrected by handwriting shown in FIG. 5 (e)
The image data in M is transferred to the area corresponding to the designated handwriting input area in the image buffer memory PM and stored in the same size (step 140). As a result, the original image data in the image buffer memory PM is updated as shown in FIG. 5 (f). And after this, the CPU 13
After the updated original image data is transferred to the display memory DM at the original reduction ratio (in this case, reduced), the additional writing process by handwriting ends. As a result, CRT8
The image data as shown in FIG. 5 (g) is displayed on the screen.

According to this configuration, when handwriting writing processing is performed, the image data to be corrected is not the image data itself of the display memory DM, but the required portion of the original image data of the image buffer memory PM is temporarily transferred to the display memory DM at the same size. In the enlarging / reducing circuit 6, the original image data is updated by transferring the corrected image data to the required area of the image buffer memory PM at the same size. Even if a calculation error occurs in the enlargement / reduction processing, line fluctuation or line deviation may occur in a part of the original image data in the image buffer memory PM when updating the storage content. Without handwriting writing process can be done.

[Effects of the Invention] Thus, according to the present invention, when the correction processing by handwriting or the like is performed on the enlarged or reduced document image on the CRT, line fluctuations, deviations, etc. occur in the original image data. It is possible to perform a suitable correction process without any need.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to the claims of the present invention, FIG. 2 is a hardware schematic configuration diagram of an apparatus of an embodiment of the present invention, FIG. 3 is a diagram showing a display example of a CRT display, and FIG. 4 is a handwriting according to the present invention. FIG. 5 is a flowchart for explaining the process, FIG. 5 is a diagram for explaining an example of a screen change on the CRT at the time of handwriting processing according to the present invention, and FIGS. 6 and 7 are for explaining problems caused by the conventional handwriting processing. FIG. 1 ... Scanner, 2 ... Scanner / Printer interface, 3 ... Image bus switching control circuit, 4I, 4II ... Two-dimensional address generator, 5 ... Printer, 6 ... Enlargement / reduction circuit, 7 ... Display controller, 8 ... Display, 9 ... Vertical / horizontal expansion circuit, 10 ... Character generation circuit,
11 …… Compression / expansion circuit, 12 …… Optical disk, 13 …… CPU, 1
4 ... CPU memory, 15 ... interface, 16 ... mouse, PM ... image buffer memory (page memory), DM ...
… Display memory.

Claims (1)

[Claims] 1. In the image data stored in the first storage means for storing image information, which is stored in the second storage means and then displayed, the image data supplied to the display. In the image processing method for performing additional writing processing, a step of designating a target area of the additional writing, and a first area corresponding to the target area designated by this step
Reading the image information in the storage means for display without being enlarged / reduced in the same size; performing additional writing processing on the image displayed in this step; and additionally writing processing in this step. A step of storing the generated image information in the first storage means in the same size without scaling the image information.