JPS60108976A - Crt graphic display device - Google Patents

Abstract

PURPOSE:To calculate the area of a video displayed on a CRT in each color by providing the titled device with an adder and memories and counting up the number of picture cells in one frame. CONSTITUTION:Display data stored in a video memory 2 are converted into serial data by parallel/serial conversion register 3 and the serial data are supplied to a video signal conversion part 4 and a memory 5 as data indicating color in each picture cell. The memory 5 accesses the address of an input and reads out the data. An adder 6 adds +1 to the read-out data and the +1 added data are written in the same address again. Said operation is continued by one frame, so that the total number of picture cells displayed by the same color data is stored in the memory 5. Area data can be found out by reading out the contents of the memory 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of 411 in production] The seventh invention relates to a 4T graphic display device, particularly a CRT graphic display device having a function of calculating the area of each color of an image displayed on a CRT. It is related to.

[Background technology]

At present, many attempts are being made to equip robots, NC machine tools, etc. with a single eye to perform advanced control.

It is also well known that research and development of pattern recognition technology is underway.

One of the key points in this field is to calculate the area of each color of an image displayed on a CRT.

In this case, in the conventional device as shown in FIG. 1, the processing is performed by hardware in the arithmetic processing section (not shown), but this has the drawback of increasing memory capacity and processing time.

[Disclosure of prior application search results]

In addition, Japanese Patent Application Laid-Open No. 48-41681 proposes that a part of a television receiver be equipped with a circuit for displaying the area.
There is no function to calculate the area of each color.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances.
The present invention aims to provide a T-graphic display device.

[Summary of the invention]

In order to achieve the above object, the present invention includes an adder that adds data read from a video memory for each data of the same color, and a memory that updates the added data.
The area of each color is calculated by counting the number of pixels between one frame.

[Embodiments of the invention]

Hereinafter, a specific embodiment of the present invention will be described with reference to FIG.

1 is a display controller that controls drawing and display of video data; 2 is Red and Green;

Three circuit video memories prepared for Blue, 8 are registers for parallel-to-serial conversion of the output data of the video memory 2 and the other, and 4 is a video signal converter.

5 is a memory that stores data that is updated while being added; 6 is an adder that adds +1 to the output data of memory 5; 7 is a register that sets the address of memory 5;
8 is a register for reading output data of the memory 5.

The display data stored in the video memory 2 is subjected to parallel-to-serial conversion by a parallel-to-serial conversion register 3, and is supplied to a video signal converter 4 and a memory 5 as data representing a color for each pixel. , the video signal converter 4 outputs the signal to the display monitor and displays it in color as in the conventional example. In the memory 5, the address indicated by the data representing the color of each pixel in the parallel-to-serial conversion register 8 is accessed, and the stored data is read out. The read data is incremented by +1 by an adder and written again to the same address. By continuing this operation for one frame, the total number of pixels represented by the same color day and night is stored in the memory 5, and by reading it out, area data can be obtained.

That is, the example shown here uses seven colors, namely red (Re
(referred to as 1t below d), green (same as Green <0>, ;!
i (B IuC same B), yellow (Yes] ow same <
Y), blue-green (Cyan same < C), purple (Mage
This is an example of displaying nta same M), white (White, e same <W>, and as shown in Figure 3, K]l L, G, and B are combined to synthesize Y, C, M, and W. be.

When the memory 5 receives signals from the three video memories 3 of R, G, and B as addresses, the present invention can be applied not only to the seven-color display K but also to monochrome as well as multi-color displays. Needless to say.

[Other Examples]

Also, a parallel-serial conversion register 3 and a video signal conversion section 4
A lookup table may be provided between 0 and the output of the lookup table may be supplied to the memory 5.

In this way, it is possible to easily change the direction of the specified color. That is, the color signal designated by the display controller 1 can be converted into a different color signal using the lookup table, which is particularly effective in multi-color display.

〔Effect of the invention〕

As described above, according to the present invention, since the area of an image displayed on a CRT can be calculated for each color, it is very effective as a means for pattern recognition.

Furthermore, since a memory is used, there is an advantage that by changing the upper address, new area data can be stored without erasing the previous area data.

Furthermore, in the case of multiple displays, even if the number of addresses increases, it can be adequately handled.

[Brief explanation of drawings]

FIG. 1 shows a conventional example, and FIG. 2 shows a specific embodiment of the present invention. 5: Memory 6: Adder Figure 1 Figure 2 Zuho

Claims (1)

[Claims] In a graphic display device using a raster scan type CRT, ta+ a display controller that controls drawing and display, (bl a video memory that stores video data, and (C1 parallel-serial conversion of the video data); td) a memory that inputs the signal output from the parallel-serial conversion register as an address signal, and an adder that adds +1 to the output data of the memory. Characteristic CRT graphic display device.