JPH06103500B2 - Image editing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a case where an image read by a scanner is erroneously processed when the image is processed on a bitmap display. The present invention relates to an image editing apparatus having a so-called undo function, which can restore the processing state of.

2. Description of the Related Art A conventional image editing apparatus of this type has a poor display resolution, does not read an image from a scanner, and restores the processing state of one command before for an image drawn by a program. It is an operation.

FIG. 6 shows a schematic block diagram of a hardware configuration of a conventional system. This system includes a bitmap display 1, a keyboard 2 or a mouse 3 for giving an operator a command for drawing a graphic, and a buffer memory 4 for buffering the screen of the display 1.
And a printer 5 for printing an image drawn on a display screen, and a processing block 6 having a CPU (central processing unit). This block 6 is connected to each of the above parts via a system bus 7. ing.

As shown in FIG. 7, the processing block 6 is composed of an image processing means 61, a display drawing processing section 62 and a buffer display transfer section 63.

In this system, the screen of the display 1 and the buffer memory 4 have the same resolution and have a one-to-one correspondence. However, since the screen is usually smaller than that of the printer 5, the buffer memory 4 normally fits the size of the paper output by the printer 5.

FIG. 8 is a system diagram showing a flow of processing operation when the display screen is restored to the original processing state when the image having the above-mentioned configuration is erroneously processed. Here, the screen of the display 1 has a size of A × B,
The buffer memory 4 has a size of 1 × m.

First, if a command to draw a circle is given, CP
U draws a circle M on the screen of the display 1 (see step ST1 in FIG. 9). Then, the screen of the display 1 is transferred to the buffer memory 4 as it is (see ST2 in FIG. 9). Next, given a command to draw a triangle,
The CPU draws a triangle S on the screen of the display 1 (see ST3 in FIG. 9).

Here, this triangle S is actually an erroneous operation, and when it is desired to restore the display screen to the original one image (circle) processing state, the entire memory is directly transferred from the buffer memory 4 to the screen of the display b. Yes (ST4 in Figure 10
reference). This implements an undo function that restores the image to the previous processing state.

Problems to be Solved by the Invention However, according to the above-described conventional device, due to its configuration, it is not possible to display all the paper sizes to be output to the printer on the display screen, and when processing an image, ,
There is a means of using a means such as a scroll, and thus there is a problem that operability is poor.

The above-mentioned problem arises from the fact that the idea of processing an image has not been studied so far in conventional systems.

As a solution to the above problem, it is conceivable to make the size of the display large enough to display all the printing paper, and to increase the resolution of the display so that all the printing paper can be displayed. Any of these is not preferable because it leads to a significant increase in cost. For example, to raise the resolution of a display that displays half the size of A4 size paper to a size that can display all A4 size paper, the cost will increase more than double.

Further, a method is conceivable in which an image reduced to half the paper size is displayed on the display, the image is processed, and the image is doubled and transferred to the buffer memory. However, this method has a problem in that when the image drawn on the display is doubled, the image loses its sharpness, and when printed, only a print product that cannot be used is obtained.
Especially, there is a problem that the letters are noticeably rattled.

The present invention has been made in view of the above-mentioned problems, and it is possible to display the entire size of the print paper on the screen and perform processing on it, and the printed image also has a sharpness. It is an object of the present invention to provide an image editing apparatus having an undo function so that it can return to the immediately preceding processing state when an erroneous processing is performed without losing it.

Means for Solving the Problems In order to solve the above problems, the present invention enables a buffer memory to perform the same processing as that of a display, and a command for performing processing on a command table. This is to be kept as a history.

Operation The present invention performs the previous process for the buffer memory from the command table by calculating the coordinates of the magnification of the display and the buffer memory. As a result, the previous processing state on the display can be taken out without losing the sharpness. When undo is requested, the buffer memory is reduced and transferred to the display. Therefore, the entire paper size to be output by the printer is displayed on the display screen, and the processing can be performed without using a means such as scroll in image processing as in the conventional case.

First Embodiment FIG. 1 is a block diagram showing the schematic arrangement of an image editing apparatus according to the present invention.

In FIG. 1, 21 is a memory that stores program data, and this memory 21 is a command table 211 for image processing.
(See FIG. 2) and is provided in the processing block 33 having a CPU. Reference numeral 22 denotes a display control circuit. The control circuit 22 performs image enlargement / reduction transfer between a bitmap display 24 for displaying an image and a buffer memory 27 having the same size as the size of paper to be printed. An image processor 23 is provided for doing this. 25 is a keyboard and 26 is a mouse.

The difference between the memory 21 and the buffer memory 27 is that the buffer memory 27 is connected to an image bus 32 for image data transfer, and the image processor 23 performs an image drawing process on the buffer memory 27. be able to.

28 is a scanner for reading images, 29 is a scanner
Control circuit for controlling 28 and laser beam printer 30, 31
Is a system bus for transmitting CPU instructions and data to each unit.

Figure 2 shows. FIG. 3 is a schematic block diagram showing an example of an internal configuration of the processing block 33, in which 331 is an image processing means and 332
Is a command management unit, 333 is a drawing processing unit for the display 24, 334 is a drawing processing unit for the buffer memory 27, 335
Is a transfer unit for transferring a reduced (1 / N times) image from the buffer memory 27 to the display 24. The command management unit 332 is connected to the command table 211 for keeping a history of image processing commands.

FIG. 3 is a system diagram for explaining an example of the processing operation flow of the image editing apparatus having the above-mentioned configuration. In the figure, the left column is the screen of the display 24 having the size of A × B, and the middle column is the column. Is a buffer memory 27 having a size of A · N × B · N
Here, N is a value indicating the difference in size between the display 24 and the buffer memory 27. The right column shows the command table 211.

Next, the operation will be described with reference to FIGS. 1B to 3.

First, the image obtained by reading the original is stored in the buffer memory 27 by the scanner 28. Image is buffer memory
Once stored in 27, processing block 33 directs display control circuit 22 to display an image. When this instruction is received,
The image processor 23 inside the display control circuit 22 takes in an image from the buffer memory 27 via the image bus 32, and reduces the size of the paper to be printed to the size of the display screen of the display 24. The display control circuit 22 displays the reduced image on the display 24.

When it is desired to perform some processing on the image displayed on the display 24, the operator selects the image processing mode from the keyboard 25 as is conventionally done.

When a circle is drawn on this image data, the operator gives a command to draw a circle to the processing block 33 via the keyboard 25 or the mouse 26. Processing block
The CPU in 33 draws a circle M in the display area of the image data displayed on the display screen (see a in FIG. 3). This process corresponds to step ST21 in the flowchart shown in FIG.

Next, the command table for the drawn circle M processing commands
Register in 211 (see b in FIG. 3). This is done to keep a history of image processing commands. This process corresponds to ST22 in FIG.

Next, for example, if a command to draw a triangle is given, the CPU draws a triangle S on the display screen 24 (see c in FIG. 3). That is, the following processing is performed on the display 24. Then, like the above, this processing command (in this case, the processing command of the triangle S)
Is registered in the command table 211 (see d in FIG. 3). This processing also corresponds to ST22 in FIG.

Next, the previous processing command, that is, the processing command older than the processing on the display screen (processing of triangle S: see c in FIG. 3) (processing command of circle M) is command table 211 (in FIG. 3). The calculation process is performed so as to be given to the buffer memory 27 (see d) (see e in FIG. 3). At this time, the size N of the difference between the sizes of the display 24 and the buffer memory 27 is taken into account to calculate the size of the coordinates (circle M in this case) of the processing command (enlargement processing). That is, the writing process of the immediately preceding process command from the command table 211 to the buffer memory 27 is performed by calculating the magnification of the display 24 and the buffer memory 27. put it here,
An image (circle M in this case) older than the image on the display screen 24 (see c in FIG. 3) remains in the buffer memory 27 as a history (see e in FIG. 3). This process corresponds to ST23 in FIG.

As described above, the image read by the scanner 28 is processed on the bitmap display 24.

Here, the display screen immediately preceding the screen (eg, c in FIG. 3) that was erroneously processed (in this case, a in FIG. 3).
When the undo is requested, that is, when the undo is requested, the CPU reduces the buffer memory (see e in FIG. 3) to 1 / N times and transfers it to the display 24 (a in FIG. 3). reference). For the 1 / N transfer f, the image processor 23 is used to speed up the process so that the operability is not adversely affected. This process corresponds to ST24 in FIG.

When printing the image drawn on the display screen, it is performed based on the buffer memory 27. Therefore, the printed image quality does not lose its sharpness.

EFFECTS OF THE INVENTION As is apparent from the above description, the present invention enables the buffer memory that stores an image as a bitmap to perform the same processing as the display, and the processing command of the image is stored in the command table as a history. Register,
The previous process to the buffer memory from this command table is performed by calculating the magnification of the display and the buffer memory, and when undo is requested, the buffer memory is reduced and transferred to the display, and the print is buffered. Since it is designed to be based on memory,
The printed image quality does not lose its sharpness, and all print paper sizes can be processed on the screen without using conventional scrolling means.
It has the effect of realizing the do function.

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing an embodiment of an image editing apparatus according to the present invention, FIG. 2 is a schematic block diagram showing an example of an internal configuration of processing blocks in FIG. 1, and FIG. 3 is related to the present invention. FIG. 4 is a flow chart for explaining an example of the flow of processing operations of the image editing apparatus, FIG. 4 is a flowchart of drawing processing in the apparatus of the present invention, FIG. 5 is a flowchart of undo processing in the apparatus of the present invention, and FIG. FIG. 7 is a schematic block diagram of the image editing apparatus, FIG. 7 is a schematic block diagram showing the internal configuration of the processing blocks in FIG. 6, and FIG. 8 is a system diagram for explaining the flow of processing operations of the conventional image editing apparatus. FIG. 9 is a flowchart of the drawing process in the conventional device, and FIG. 10 is a flowchart of the undo process in the conventional device. 21 ... Memory, 211 ... Command table, 22 ... Display control circuit, 23 ... Image processing processor, 24 ...
Bitmap display, 27 ... Buffer memory, 28
...... Scanner, 29 ...... Scanner / printer control circuit, 30 ...... Laser beam printer, 31 ...... System bus, 32 ...... Image bus, 33 ...... Processing block.

Claims (1)

[Claims] 1. A reading means for reading an image, a storage means for storing the image in the same size as a paper size for printing, a display means for displaying the image from the storage means via an image bus, and the storage. Image processing means for reducing the image in the means from the size of the paper size to the size of the display screen of the display means, operation means for instructing processing on the image displayed on the display means, and this operation means First processing means for drawing a desired graphic on the image displayed on the display means based on a command instructed by the command, and a command table for registering the command after drawing the graphic by the first processing means. Then, a figure represented by the command registered immediately before the command is generated from this command table, and the magnifications of the storage unit and the display unit are coordinate-calculated. When it is desired to perform a large process and to return the display screen of the display unit to the previous processing unit that combines the enlarged graphic with the image and writes the image in the storage unit, the inside of the storage unit And a third processing unit that reduces the size of the composite image to the size of the display screen and transfers the size to the display unit.