JPH02306376A - Free-draw picture drawing method in reducing display - Google Patents

Abstract

PURPOSE:To realize the free-draw picture drawing of high speed and in addition, of high resolution at low cost by extracting the data of a part picture-drawn by logical operation with an original picture after drawing a picture on only a reduced and displayed displaying memory. CONSTITUTION:Picture data stored in a picture data storage part 11 is given logical product reducing processing by a logical product reducing processing part 13, and is displayed on the screen of a display device 9, and a black point is drawn on the displaying memory 10 by the data inputted from a coordinate input device 5. After that, the data which is original picture data given the logical product reducing processing and the data on the displaying memory 10 are exclusive OR processed by an XOR operation processing part 15, and the part of the free-draw picture drawing is extracted by an extracting processing part 16, and is transferred to the picture data storage part 11 while OR operation enlarging processing it with the original picture data of the picture data storage part 11 by an OR operation enlarging processing part 17. Thus, the free-draw picture drawing at the time of reduction is executed without deteriorating the quality of the picture data of the picture data storage part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a free draw method in a reduced display suitable for implementation in a personal computer, DTP (desk top publishing), and various other image processing systems. The present invention relates to a drawing method, and particularly to a free-draw drawing method that allows high-speed, high-resolution drawing to be realized using a low-cost device.

11 Generally, when displaying image data on a CRT display, the resolution of the original image read by a scanner is 4.
00 dpi (dots per inch) and the resolution of a CRT display is 100 dpi (dots per inch), in order to display it at the same size on the CRT display, it must be reduced to 1/4. There is a need.

In this way, when free drawing is performed on an image that is displayed in a reduced size, the following three drawing methods are conventionally used.

The first is a drawing method that draws on both the original image and the display memory when drawing. The second is a drawing method that stores the locus of a coordinate input device such as a pointing device in memory during drawing, and then finishes drawing. There are three free draw drawing methods: (1) drawing on the original image; and (3) drawing in a reduced display memory and enlarging it after drawing is completed.

In the first drawing method, which draws to both the original image and display memory when drawing, address calculations and drawing processing are performed to both the original image and display memory as the coordinate input device moves. As a result, the movement of the cursor of the coordinate input device may become blurry, or conversely, the drawing process may not be able to follow the movement of the coordinate input device.

The second drawing method, in which the trajectory of a coordinate input device such as a pointing device is stored in memory during drawing, and then drawn on the original image after drawing, requires a large amount of buffer memory during the program. However, if the buffer capacity is exceeded, there is a problem that the process will be interrupted even during drawing.

In the third drawing method of "drawing in a reduced display memory and enlarging the drawing after completion of drawing", the reduced drawing is enlarged again, resulting in a problem of reduced resolution.

Here, it is equipped with a conventional display, a display memory for holding data to be displayed on the display, a coordinate position manual means, and a central processing unit such as a CPU, and the coordinate position input means moves according to the movement of the coordinate position input means. A personal computer will be described as an example of an image processing device having a function of drawing the trajectory using a black or white dot signal.

FIG. 3 is a functional block diagram showing an example of the main configuration of a conventional image processing system that has a function of drawing a trajectory using a black or white driver l-signal as the coordinate position input means moves. It is. In the drawing, 21 is an input device such as a keyboard, 22 is a position input device (pointing device), 23 is an image scanner, and 24
is a CRT display unit, 25 is a printer, 26
is FDD (floppy disk driver) unit, 27 is HDD (hard disk driver) unit, 28 is system main body, 29 is CPU, 30 is R
OM, 31 is RAM, 32 is keyboard controller,
33 is a pointing device controller, 34 is a scanner controller, 35 is a CRT controller, 3
6 is a printer controller, 37 is an FDD controller, 38 is an I-(DD controller), 39 is a communication control unit, and 40 is a system bus.

The functions of each part of the image processing system shown in FIG. 3 are outlined as follows.

The input device 21 is composed of a keyboard or the like, and is an input means for inputting system startup and other commands, necessary character information, and the like. Information input from this input device 21 is sent to the computer side via the keyboard controller 1-0-32 and system bus 40.

The position input device 22 is a pointer cursor input means (pointing device) that indicates a position on the display screen, and the input information is also sent to the computer side via the pointing device controller 33 and the system bus 40. Ru.

The image scanner 23 is a single image input means, and the read image information is similarly sent to the computer side via the scanner controller 34.

The CRT display unit 24 is a display means that visually displays character/numeric information and image information of documents being created and documents that have been created, as well as guidance necessary for operation, etc., in a dot pattern on its screen.

A CRT controller 35 is connected to this CRT display unit 24, and controls data and guidance developed in a dot pattern to be displayed on both sides.

The printer 25 is a dot image printing device such as a thermal transfer type printing device having an electrically heated head, a so-called thermal dot printer, an inkjet printer, a plunger magnet type printer, etc., and prints a document using data created by it. Print documents, documents, images, etc. using dot patterns.

This printer 25 is given data such as created characters and numbers, image information, format information, and other control information from the computer side via the system bus 40 and printer controller 36, and creates a notebook copy. do.

FDD unit 26 floppy disk and HD
The hard disk of the D unit 27 is an external storage device, and the read information is stored in the FDD controller 37 and H
It is sent to the computer side via the DD controller 38 and system bus 40. Note that as the external storage device, a magnetic disk, magnetic tape, or other large-capacity storage device can also be used.

The communication control unit 39 controls information exchanged with other communication terminal devices.

The CPU 29, the ROM 30, and the RAM 31.

It constitutes the system control section of a personal computer.

That is, the ROM 30 stores programs for controlling the system, character pattern data, etc.
Further, RAM3] is a system memory that stores necessary data.

C)) tJ 29 controls the entire system shown in Fig. 3. For example, it receives key information from the input device 21, performs corresponding processing operations and outputs control commands, and also performs processing based on key human power information. outputs data to the CRT display 24 or printer 25, or outputs data to the image scanner 2.
The image data is manually input from 3, and then the FDD unit 2
It accesses the G floppy disk and the hard disk of the HDD unit 27, and manages various controls such as sending and receiving data via the communication control section 39.

Although the display memory is not particularly shown,
It is built into the CR,T display unit 24, and
Logical operations and the like during image transfer are executed by programs stored in the ROM 30 and RAM 31.

An image processing system such as a personal computer has a configuration as shown in FIG.

As mentioned above, the conventional free draw drawing methods for reduced display all have their advantages and disadvantages.
It has been difficult to achieve high-speed, high-resolution free draw drawing with a low cost of 1-m image processing.

This invention solves these inconveniences in the conventional free-draw drawing method for reduced display, and provides high-speed, high-resolution free-draw drawing using a low-cost image processing device. The aim is to make it possible.

11 邂藷工) k-前远该本发明具备显像、显像存储存储器存储标识测试机构、C
In an image processing system comprising a central processing unit such as a PU, and a function of drawing a trajectory using a black or white dot signal in accordance with the movement of the coordinate position input means, the original image data and the display memory are and the reduced image data, the image data is reduced and transferred to the display memory for display.

A point on the display memory that is being reduced is drawn using a black or white dot signal in accordance with the movement of the coordinate position manual means, and after the drawing is completed, the original image data and the reduced image data in the display memory are drawn. By performing logical operations, the portion drawn by the coordinate position manual means is extracted, and the extracted portion is enlarged and transferred to the original image for drawing.

Part 1: Next, embodiments of the free draw drawing method for reduced display according to the present invention will be described in detail with reference to the 5 drawings.

FIG. 1 is a functional block diagram showing an example of the main structure of an image processing device for carrying out the free draw drawing method in reduced display of the present invention. In the drawing, 1- is a scanner, 2 is a scanner. 3 is an input device such as a keyboard, 4 is an image editing processing unit 75 is a coordinate input device such as a pointing device, 6 is a coordinate input device controller, 7 is a drawing control unit, and 8 is a display control unit. 9 is a display device such as a CRT, 10 is a display memory, ], 1 is an image data storage unit (image memory), ].

2 is IF, a thinning reduction processing section, J3 is a logical product reduction processing section, 14 is a logical sum reduction processing section, 15 is an X0R (exclusive or) operation processing section, 16 is an extraction processing section, 1
7 is an OR (logical sum) operation expansion processing unit, 18 is an AND (
19 indicates a black and white inversion processing section.

Normally, the image data used for image editing is sent to the scanner 1.
, and stored in the one-image data storage section 11.

The image data stored in the image data storage section 11 is sent to the display memory 1o via the drawing control section 7.

The image data on the display memory 10 is displayed on the screen of a display device 9 such as a CRT display under the control of the display control section 8.

Further, in normal reduced display, the simple thinning/reducing processing unit 12 performs reduction processing on the image data stored in the one-image data storage unit 11.

The reduced image data is transferred to the 5 display memory 1o via the drawing control unit 7.

Therefore, this reduced image data is displayed on the display device 9.
displayed on the screen.

The subsequent operations are the same as in conventional image editing.

The free draw drawing method in the reduced display of this invention is as follows:
It is as follows.

1 by instructions from an input device 3 consisting of a keyboard, etc.
When the image editing processing section 4 is activated, free draw drawing according to the present invention is activated.

First, when reduced free draw drawing is activated, the logical product reduction processing unit 1-3. Alternatively, image data reduction processing is performed by reduction processing with logical operations performed by the OR reduction processing unit 14.

First, a case will be described in which the activated reduced free draw drawing draws a black dot.

The logical product reduction processing unit 3 performs logical product reduction processing on the image data stored in the image data storage unit 11, and transfers the reduced image data to the display memory 10 via the drawing control unit 7. It is displayed on the screen of the display device 9.

In this display state, data input from a coordinate input device 5 such as a pointing device is provided to the drawing control section 7 via a coordinate input device controller 6.

The drawing control unit 7 draws a black dot on the display memory 10 based on the input information given.

At this time, the drawn data has already been stored in the display memory 1o.
The images are displayed on both sides of the display device 9 under the control of the display control section 8 together with the image data recorded in the image data.

Thereafter, the XOR processing section 15 performs exclusive OR processing on the original image data stored in the image data storage section 11 subjected to the logical product reduction process and the data on the display memory 10. Through these operations, the free draw drawing portion of the data on the display memory 10 is extracted by the extraction processing unit 16.

This extracted drawing data is processed by the OR calculation enlargement processing unit 17.
The image data is transferred to the image data storage section 11 while being subjected to a logical sum operation and enlargement process with the original image data in the image data storage section 11.

Through the above processing, free draw drawing during reduction can be performed without degrading the quality of the image data in the image data storage section 11-.

Next, a case will be described in which the activated reduced free draw drawing is for drawing a white point.

Image data storage section 11. The logical sum reduction processing unit 14 performs logical sum reduction processing on the image data stored in -Display on L.

In this display state, input data from the coordinate input device 5, such as a pointing device, is given to the drawing control section 7 via the coordinate input device controller 1-roller 6.

The drawing control section 7 draws a white dot on the display memory 10 based on the input information provided.

At this time, the drawn data has already been stored in the display memory J.
Together with the image data recorded in O, it is displayed on the screen of the display device 9 under the control of the display control section 8.

Thereafter, the data obtained by adding OR reduction processing to the original image data stored in the image data storage section 11 and the data on the display memory 10 are subjected to exclusive OR processing by the XOR operation processing section 15.

Through such an operation, the free draw drawing portion of the data on the display memory 10 is extracted by the extraction processing unit 16.

After the extracted drawing data is inverted in black and white by the black-and-white inversion processing unit 19, the AND operation enlargement processing unit 18 performs a logical product W with the original image data in the image data storage unit 11.
The image data is transferred to the image data storage unit 11 while being enlarged.

With the above processing, even in self-drawing, free-draw drawing at the time of reduction can be performed without degrading the quality of the image data in the image data storage section 11.

FIG. 2 is a flowchart showing the main processing flow of the free draw drawing method of the present invention using the image processing apparatus shown in FIG.

In the drawings, #1 to #10 indicate steps.

In step #1, it is determined whether the dot signal for drawing is black or white.

If it is black, the process advances to step #2 and one image data is logically reduced and transferred from the image memory to the display memory.

Step #: Draw a black point in the display memory using the coordinate position input table W.

Step t! , 4, the images are logically reduced and transferred from the 2-image memory to the display memory while performing an XOR operation.

In step #5, the image is enlarged and transferred from the 5 display memory to the image memory while performing an OR operation.

Through the above steps #2 to #5, the black point drawing is completed.

If it is determined that the image is white in the previous step #1, the process proceeds to step #6, where the image data is OR-reduced and transferred from the image memory to the display memory.

In step #7, a white point is drawn on the display memory by the coordinate position manual device.

In step #8, from image memory to display memory.

While performing an XOR operation on the image, the image is logically reduced and transferred.

In step #9, the image on the display memory is subjected to black and white inversion processing.

In step #10, one image is enlarged and transferred from the display memory to the image memory while performing an AND operation.

By the above steps #7 to #JO, the white point drawing is completed.

According to the free draw drawing method for reduced display of this invention, since drawing is performed only in the reduced display memory, the movement of a cursor for a coordinate input device such as a pointing device may become blurry. , the coordinate input device may no longer follow the movement. This cone point is solved (a problem with the first conventional drawing method).

In addition, the free draw drawing method of the present invention does not buffer the position of the coordinate human power device, so there is no need for a buffer memory, and the process may be interrupted due to lack of buffer capacity during drawing. There will be no inconvenience (
Problems with the conventional second drawing method).

Furthermore, in the free draw drawing method of the present invention, after the drawing is completed, the data of the drawn part (trajectory) is extracted by logical operation with the original image and the drawing is completed.
Many excellent effects such as no reduction in the resolution of the original image (a problem with the conventional third drawing method) can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing an example of the configuration of essential parts of an image processing device for implementing the free draw drawing method in reduced display according to the present invention. FIG. 2 shows a flowchart 1-1 showing the main processing flow of the free draw drawing method of the present invention using the image processing device shown in FIG. 1. FIG. FIG. 1 is a functional block diagram showing an example of the configuration of main parts of an image processing system. In the drawings, 1 is a scanner, 2 is a scanner control unit, and 3 is a scanner.
4 is an input device such as a keyboard, 4 is an image editing processing unit, 5 is a coordinate input device such as a pointing device, 6 is a coordinate input device controller, 7 is a drawing control unit, 8 is a display control unit, and 9 is a CRT etc. a display device, 10 a display memory, 11
is an image data storage unit, 1 and 2 are simple thinning/reduction processing units,
13 is a logical product reduction processing section; 14 is a logical sum reduction processing section; 1
5 is X, OR calculation processing section, 16 is extraction processing section, 1-
7 is an OR operation enlargement processing section, 18 is an AND operation enlargement processing section, and 19 is a black and white inversion processing section.

Claims (1)

[Claims] A display, a display memory that holds data to be displayed on the display, coordinate position input means,
In an image processing system comprising a central processing unit such as a PU, and a function of drawing a trajectory using a black or white dot signal in accordance with the movement of the coordinate position input means, the original image data and the display memory are provided. and a logical operation means for logically performing a logical operation on the reduced image data, the image data is reduced and transferred to the display memory for display, and the reduced and displayed point on the display memory is input to the coordinate position input means. The portion drawn by the coordinate position input means is drawn using a black or white dot signal according to the movement, and after the drawing is completed, a logical operation is performed on the original image data and the reduced image data in the display memory. A free draw drawing method characterized by drawing by extracting the extracted part, enlarging the extracted part, and transferring it to the original image.