JPS62198895A - Half tone color processor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an intermediate color processing device in a color display device used as an input/output device for a computer or the like.

(Prior Art) A conventional color display device has one graphic memory for each of the three primary colors red, green, and blue, and the output from these memories is passed through each video drive circuit to each cathode of a color cathode ray tube to form a color graphic pattern. Perform display. However, since the graphic memory is a digital memory, the colors displayed on the display device are usually 3 primary colors and 5 composite colors of each primary color, for a total of 8 colors (red,
Only green, blue, purple, yellow, light blue, white, and black) can be displayed.

However, with the above method, only 8 colors can be displayed, but one color among the above 8 colors can be specified for each dot on the display device as an intermediate color other than the 8 colors. There is a way to specify and display a color independently for each item. In this way, because the dots themselves are so fine that they are adjacent to each other, it appears to the human eye as if the colors are mixed, making it possible to display intermediate colors other than the eight colors mentioned above.

(Problem to be solved by the invention) However, in the conventional method of specifying a color for each dot, each of the three primary colors corresponding to that color is specified (0 or 1), and 8 dots are grouped as one set. This must be specified using hexadecimal expression, and depending on how the colors of each dot are combined, it is very difficult to generate a neutral color without stripes or unevenness.

In contrast, the present invention creates and registers dot patterns in neutral colors without stripes or unevenness in advance, and utilizes dot patterns that mix colors in various ratios, and for each primary color. The purpose of the present invention is to obtain an intermediate color processing device that appears as if colors are mixed to the human eye without specifying them.

(Means for Solving the Problems) In the present invention, in processing intermediate colors in a color display that displays a color graphic pattern based on signals read from a graphic memory corresponding to each of the three primary colors. and a dot pattern control section which receives color data of the mixed color and data of the dot pattern from the input means, and outputs the dot pattern determined to be registered and the ratio data of the color to be mixed, and the dot pattern data determined to be registered. A dot pattern storage unit outputs an intermediate color to the data storage and display means, and a data output of the mixing color ratio from the dot pattern control unit is supplied to the data storage and display unit. A mixing ratio storage unit that outputs the ratio, data on the ratio of the intermediate color to be mixed to be displayed from the input means, and ratio data of the registered color from the mixing ratio storage unit are supplied, and the registered ratio data is supplied. a color mixing ratio control section that outputs ratio data with a value closest to the ratio data from the input means; and an approximate ratio calculation section that performs approximate correspondence between the registered ratio data and the ratio data from the input means. and a generation intermediate color mixing ratio storage section which is supplied with the ratio data output from the color mixing ratio control section and outputs the ratio to the storage and display means for storing the data, and the color data for mixing the intermediate color to be displayed from the input means and the above. An intermediate color that outputs intermediate color data in which the registered dot pattern from the dot pattern storage unit is supplied and color data to be mixed with the dot pattern corresponding to the ratio data to be displayed in the generated intermediate color mixing ratio storage unit is assigned. a creating section, an intermediate color storage section to which the intermediate color data output is supplied and outputting the intermediate color to storage and display means for the data, the dot pattern control section, the color mixing control section,
comprising a control unit for controlling an intermediate color creation unit and a display means;
It allows you to create, register, and display intermediate colors.

(Function) In the present invention, the optimal dot pattern corresponding to the mixing of colors at various different ratios is registered in advance at the initial intermediate color creation stage, and the dot pattern corresponding to the mixing ratio and the mixing color is registered in advance. A color is assigned to the registered dot pattern accordingly. By doing so, there is no need for input by specifying bits from each of the three primary colors, and it is possible to prevent striped patterns and unevenness in the generated intermediate colors.

The principle of the intermediate color processing device according to the present invention will be explained below with reference to the drawings. FIG. 1 is a functional block diagram of the present invention. The present invention is broadly divided into a part for creating and registering dot patterns necessary for creating intermediate colors, and a part for displaying dot patterns that are applied to the registered dot patterns based on the colors to be mixed and their ratios input at the time of creating intermediate colors. ing.

First, regarding the former dot pattern creation and registration, the dot pattern input from the input device 1 through the input device control 2 is sent to the dot pattern control unit 4, and the dot pattern is stored in the dot pattern storage unit 8, and the color to be applied to the dot is stored. The ratio is stored in the mixing ratio storage section 9 so that it can be used later in the system when creating intermediate colors.

Regarding the latter intermediate color display, the color data of the colors to be mixed and the data of the ratio of the colors inputted from the input device 1 through the input device cotton roll 2 are controlled by the color mixing ratio control unit 5 to the ratio of the colors to be mixed. Well,
Approximate ratio calculating section 6 sets the input ratio approximately to the ratio stored in mixing ratio storage section 9 by comparing it with the ratio stored in mixing ratio storage section 9;
The generated intermediate color mixture ratio is stored in the storage unit 10. For the color data of the colors to be mixed, the intermediate color creation section 7
The dot pattern corresponding to the mixing ratio determined by the color mixing ratio control unit 5 and stored in the generated intermediate color mixing ratio storage unit 10 is read out from the dot pattern storage unit 8, and the colors are arranged according to the pattern to generate the generated intermediate color. The intermediate color dot pattern is stored in the intermediate color storage section 11. Display section 12
The above-mentioned series of processes for creating an intermediate color and the generated intermediate color dot pattern are monitored on the display device 13 as an intermediate color. The control section 3 controls the movement of control among the dot pattern control section 4, the color mixing ratio control section 5, the intermediate color creation section 7, and the display section 12 in a series of processes.

(Example) Hereinafter, the intermediate color processing device of the present invention will be described in more detail using Examples. FIG. 2 is a block diagram showing an intermediate color processing device according to an embodiment of the present invention. Central processing unit 22
The process is performed according to the processing procedure shown in FIGS. 3(a) and 3(b), and in this process, a dot pattern memory is used to store dot patterns registered so that stripes or unevenness do not appear when creating intermediate colors. A device 25, a mixing ratio storage device 26 for storing the ratio of colors to be mixed in the dot pattern, and a generation intermediate color mixing ratio storage device for storing the approximate ratio of colors to be mixed when creating an intermediate color to be generated or displayed. 27. It has an intermediate color storage device 28 for storing generated intermediate colors, and an approximate ratio calculator 29 for determining an approximate ratio of colors to be mixed when creating an intermediate color to be generated and displayed.

FIGS. 3(a) and 3(b) show the central processing unit 2 of FIG.
Figure 3(a) shows the process for registering the dot pattern required when creating the intermediate color, and Figure 3(b) shows the approximation of input data to the mixing ratio. This is a process for displaying intermediate colors using the dot pattern determined thereby. The ratio of mixing colors and the data of the corresponding dot pattern are registered in a predetermined nutrace of the internal storage device or external storage device, and are quoted or updated.

Regarding the registration of the dot pattern, first, in a mixed color data reading 31 from the input device 21 in FIG. 2, colors to be mixed to generate an intermediate color are read as color data. Next, in a dot pattern data reading step 32, dot pattern data for specifying a color for each dot is read from the input device 21 of FIG. 2 in the same way. Based on such input data, the central processing unit allocates colors according to the dot pattern in the intermediate color display specification 33, and displays the intermediate colors in the display control device 2 of FIG.
Specify to 3. If an intermediate color consisting of the dot pattern is acceptable, the central processing unit registers the pattern in the dot pattern registration designation 35 based on the registration designation from the input device 21 in FIG. The ratio of the colors to be mixed is calculated in the mixing ratio calculation 36, and the mixing ratio registration designation 3
At step 7, registration of the ratio is designated and stored in the mixture ratio storage device 26 of FIG. If the intermediate color consisting of the displayed dot pattern is not worthy of registration, processing starts from inputting the dot pattern.

Regarding the display of intermediate colors, first input device 2 in Figure 2
1. Reading mixed color data from step 41 reads the colors to be mixed to generate an intermediate color as color data,
Before and after the loading time, the input device 2 in Figure 2 is
1, the ratio of colors to be mixed is read as data in a generation ratio data reading step 42. Based on such input data, the central processing unit reads the mixing ratio of the intermediate color dot pattern registered in advance in the mixing ratio storage device 26 of FIG. Make an approximation to a close mixing ratio. Then, in the dot pattern extraction 45, the dot pattern of the intermediate color corresponding to the mixing ratio is read out from the dot pattern storage device 25 of FIG. 2, and determined as the corresponding dot pattern for creating the desired intermediate color. Further, in the mixed color arrangement 46, the color data to be mixed is set according to the corresponding dot pattern. By doing this, the color of each dot is determined, and the color can be displayed on the display in the display control device 23 of FIG. 2.

FIG. 4 shows the storage format of data stored in the dot pattern storage device 25 and mixture ratio storage device 26 of FIG. The storage format is such that color ratio data of a registered dot pattern and its dot pattern are stored side by side for one address. The determination of the color ratio and dot pattern when displaying intermediate colors is shown in Figure 3 (
For the ratio determined in the mixture ratio extraction 43 and judgment 44 in b), read the address where that ratio is stored, and extract the dot pattern at that address in the dot pattern extraction 45 in FIG. 3(b). It becomes a pattern.

An example of specifying a dot pattern for displaying a neutral color without stripes or unevenness, and an example of a display format in the specified format are shown below. FIG. 5(a) is a diagram in which two colors are mixed, and 16 dots are specified as an example. A1 to A16 specify colors independently. Dots can be specified in units of 8 dots. FIG. 5(b) is a diagram showing the display format on the display in the designated format of FIG. 5(a).

The display format on the display is such that 8 dots are displayed side by side, and then every 8 dots are displayed below it. FIG. 5(C) is a diagram showing the intermediate color display format of the entire display screen. The display format shown in FIG. 5(b) is displayed on the entire display screen in a continuous manner vertically and horizontally.

On the other hand, FIG. 6 shows a color generation method for each dot. The color of each dot is determined by applying an electrogun 51 for each of the three primary colors through a shadow mask 52 to a phosphor dot screen 53 on which light emitters of the three primary colors are lined up. Therefore, for one dot, for example, if all three primary colors are lit (white), the ratio of the area of the lit part to the area of the dot is the maximum, but if only one of the three primary colors is specified, the ratio is the lowest. (black is not lit). The causes of striped patterns and unevenness in the display of intermediate colors are the designation of arranging many of the same color for each dot, and the occurrence of unlit portions in one dot as described above. come. Therefore, by setting and registering dot patterns with these points in mind, it is possible to create intermediate colors that are free from striped patterns and unevenness and approximately correspond to the distribution of each color.

(Effects of the Invention) As described above, the present invention sets a dot pattern corresponding to a display pattern, registers and stores it in an internal or external storage device, and uses that dot pattern depending on the mixing ratio. , it is possible to create and display a large number of neutral colors without stripes or unevenness.

[Brief explanation of drawings]

Claims (1)

[Claims] In processing intermediate colors in a color display that has a graphic memory corresponding to each of the three primary colors and displays a color graphic pattern using signals read from the graphic memory, the color data and dot pattern of the mixed color are input from the input means. data is supplied to the dot pattern control section which outputs the ratio data of the color to be mixed with the dot pattern determined to be registered, and the dot pattern data output determined to be registered is supplied to the data storage and display means. a dot pattern storage unit that outputs a dot pattern storage unit, and a mixing ratio storage unit that is supplied with data output of the ratio of colors to be mixed from the dot pattern control unit and outputs the ratio to storage and display means for the data;
Data on the ratio of colors to be mixed between the intermediate colors to be displayed and the registered color ratio data from the mixing ratio storage section are supplied from the input means, and among the registered ratio data, the ratio data from the input means is used. a color mixing ratio control section that outputs the ratio data of the closest value; an approximate ratio calculation section that performs approximate correspondence between the registered ratio data and the ratio data from the input means; a generation intermediate color mixing ratio storage unit that is supplied with ratio data output and outputs the ratio to storage and display means for the data; and a generation intermediate color mixing ratio storage unit that outputs the ratio to storage and display means for the data, and color data for mixing intermediate colors to be displayed from input means and registered information from the dot pattern storage unit. an intermediate color creation section that is supplied with a dot pattern and outputs intermediate color data in which color data to be mixed with the dot pattern corresponding to the ratio data to be displayed in the generated intermediate color mixing ratio storage section is assigned; and the intermediate color data output is supplied. an intermediate color storage section that stores the data and outputs the intermediate color to the display means; a control section that controls the dot pattern control section, the color mixing control section, the intermediate color creation section, and the display means; An intermediate color processing device characterized by displaying.