JPH02134684A - Computer graphic processing system - Google Patents

Abstract

PURPOSE:To improve the ability of graphic processing itself and to make a high-definition display by storing color image information of data on the coloring, position, and display of each picture element in a data base together with chart information. CONSTITUTION:One picture element consists of dots 13-16 on a CRT display 11 and the coloring of the dots 13-16 of each picture element and the number of dots of each color are selected respectively to determine the coloring of each picture elements, thereby displaying a color image by a set of picture elements. Further, the color image information based upon data on the coloring, position, and display range of each picture element constituting the color image is stored in the data base together with the chart information. Therefore, the colors of the dots 13-16 of each picture element and the number of dots are selected to color one picture element in an intermediate color. Namely, when the coloring of the respective dots 13-16 and the number of dots of the coloring are selected, pixels of respective colors are mixed in one picture element. Consequently, a graphic figure is displayed with high definition and the kinds of colors, the light and shade, etc., of the colors are represented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a computer graphic processing system in which graphic processing is performed by a personal computer having a color display device using a CRT display.

(Prior Art) In recent years, as personal computer-based graphic processing systems (hereinafter referred to as CAD systems) have become widespread, in addition to improvements in graphic processing capabilities such as drawing and graphic aggregation, higher-definition display functions and a wide range of There is a need for improved practicality, such as easier recognition of figures through color representation.

A major feature of CAD systems using personal computers is that they are cheaper than CAD systems using minicomputer-class computers. In order to achieve such a low price, it is necessary to install a color CRT.
As a display, it is common to use an inexpensive type of display that displays 8 to 16 colors on a combination of three primary colors. In such a color CRT display, each dot usually has red (R) and green (
It is possible to display any one of the three primary colors of G) and blue (B), or a combination of two or three of these colors. FIG. 8 is a diagram showing the relationship between these color combinations and the colors expressed by them. In the figure, 1 indicates blue, 2 indicates green, and 4 indicates red. In this case, the combination of blue 1 and green 2 is cyan 3 (=1+2>, the combination of blue 1 and red 4 is purple 5 (-1+4>, green 2 and red 4)
The combination with yellow 6 (=2+4>)
When all three primary colors, blue 1, green 2, and red 4, are combined, white 7 (-1+2+4) is produced. That is, in FIG. 1, the numbers obtained by adding the color numbers of the three primary colors 1, 2.4 used are the color numbers 3, 5, and 6.7 that are produced by the combination. In addition, black can be displayed in addition to these seven colors, making it possible to display a total of eight colors. Normally, in a CRT display having the three primary colors RGB, it is not possible to display intermediate colors other than the above eight colors as a single dot, or to change the brightness for each dot. Therefore, in a CAD system using such a color CRT display, it is possible to display figures in high definition, and in particular, to
There were major hardware limitations in expressing the shading of colors.

On the other hand, the display function of CAD software mainly uses line drawings to display straight lines, arc shapes, etc., and the database that holds information on these shapes can also efficiently display geometric information such as coordinate values and angles of line drawing shapes. It is designed primarily for handling. For this reason, while it is possible to enlarge or reduce line drawing figures of any size, it is inferior in painting functions such as storing and displaying color image information.

On the other hand, the display function of image editing software is mainly based on the paint function that generates colors dot by dot, and to save a color image, it usually takes one screen worth of image data to C.
It is designed to be saved as a state in memory for display on the RT display.

In this case, the state of the display memory differs depending on the type of computer, so one image data cannot be used on different computers.

Therefore, in a conventional CAD system using a personal computer, it is difficult to store color image information together with line drawing information and to display these data in a concentrated manner by partially enlarging or reducing the display.

(Problems to be Solved by the Invention) The present invention was proposed to solve the problems of the prior art as described above, and its first purpose is to solve the problems of the prior art as described above. (hereinafter referred to as intermediate color)
By creating an inexpensive color display device with a simple configuration that can display figures, it is possible to display figures in high definition,
In particular, the object of the present invention is to provide a highly practical and low-cost computer graphic processing system that can express different types of colors, shades of colors, etc.

Roughly speaking, the second purpose is to save color image information such as color combinations, display positions, display ranges, etc. together with line drawing information in a database, so that graphic processing using both information can be performed simultaneously. The object of the present invention is to provide a computer graphics processing system that is easy to use.

[Means of the Invention (Means for Solving the Problems) The computer graphic processing system of the present invention treats a plurality of dots on a CR display as one pixel, and processes the color development of the dots in each pixel and the color development of each color. A means for determining the coloring of each pixel by selecting the number of dots and displaying a color image by a set of such pixels, and a means for displaying a color image by a set of such pixels, and a method based on data on the coloring, position, and display range of each pixel constituting the color image. The present invention is characterized by comprising means for storing color image information together with line drawing information in a database.

Further, each pixel may be composed of, for example, 4×4 dots, a total of 16 dots.

(Function) In the present invention having the above configuration, first, by selecting the color of the dots in each pixel and the number of dots of each color, it is possible to develop the color of one pixel into an intermediate color. . That is, when the color development of each dot and the number of dots of each color development are selected in this way, a color mixing effect can be obtained in which pigments of each color are mixed at a constant ratio within one pixel. Note that by making one pixel sufficiently small on the display, it can be made to look like a single point to human vision.

In addition, by selecting the color development and display range of each pixel constituting the color image, the size and shape of the color image on the display can be freely determined.

Roughly speaking, the position (coordinates) of a color image can be expressed by expressing the position of a pixel in a coordinate system in the same way that, for example, a straight line is expressed by coordinate values (start point, end point) in line drawing information.

That is, in the present invention, color image information based on coloring, position, and display range data of each pixel constituting a color image can be stored in a database together with line drawing information, so that a color image can be displayed together with line drawing figures. Additionally, the relative position with respect to other line drawing information is also saved.

(Embodiment) An embodiment of the computer graphic processing system according to the present invention will be specifically described below with reference to the drawings. In this embodiment, a color CRT display of the type shown in FIG. 8 is used, which displays one of three primary colors or a combination of these colors for each dot.

(2) Intermediate Color Generating Means In FIG. 1, numeral 11 is a color CRT display. In this embodiment, a CRT display, which is used for ordinary personal computers and has a resolution of 640 dots in the horizontal direction and 400 dots in the vertical direction, is used. 12 is a pixel (picture element) which is a collection of 4×4 dots.

It is assumed that pixels 12 are always displayed in units of 4×4 dots at arbitrary positions on the CRT display. In this case, on the CRT display 11 of this embodiment having the above resolution, one pixel 12 is approximately 1.5 mm x 1.5 mm.
Since it is displayed at a size of 5 mm, it looks like a "dot" to human vision. By arranging several pixels 12, a meaningful image can be represented on a CRT.

In FIG. 1, numeral 13 indicates a dot that is colored both red and blue. This dot appears purple on the CRT display 11 due to the combination of red and blue. 14 is a non-colored dot, that is, a background color dot. 15
16 represents a red colored dot, and 16 represents a blue colored dot. That is, in FIG. 1, two dots each are colored in purple, red, and blue, and the remaining 10 dots are in the background color without being colored. When the background color is black, pixels can be expressed as a slightly dark purple color.

By increasing the number of red and blue colored dots, this pixel 12 can be expressed as a bright purple color.

FIG. 2 is a diagram illustrating in more detail how the colors of the dots within the pixel 12 are combined. Note that dots that are colored in the same color as in FIG. 1 are given the same reference numerals.

First, in Fig. 2 (A), two dots each are colored in red and blue, as shown at 15.16, and the remaining 12 dots are uncolored, as shown at 14. It is the background color.

In this case, pixel 12 appears to be idle and purple.

In this way, if each dot is colored in one of the three primary colors of red, green, and blue, and no other mixed colors are used, the BISSEL 12 as a whole will develop the three primary colors in the ratio of the dots of each color. Looks like a combination of colors. Then, by increasing the number of dots that are colored with a particular primary color, the effect of adding coordinated colors can be obtained. For example, in Figure 3 (A>
If the number of dots 15 that are colored red is further increased, the pixel 12 as a whole appears more reddish and purple.

Next, in FIG. 2(B), as shown as 13, four dots are colored a mixture of red and blue, that is, purple, and as shown as 14, the remaining 12 dots are colored purple. It has a non-colored background color. In this case as well, pixel 12 appears purple as in Figure 2 (A>).In this case, if you increase the number of dots that are colored purple, pixel 1
The brightness of the second color can be increased. Moreover, if the color of the colorless dot 14 in FIG. 2(B) is white, an effect of diluting the color of this pixel 12 can be obtained.

As explained above, in this example, the three primary colors,
By combining these colors, it is possible to generate intermediate colors that cannot be obtained by mixing colors alone.

When displaying one meaningful color image by arranging several pixels 12, the brightness and shading of the colors in one image can be gradually changed by gradually changing the number of colored dots in each pixel. It can be changed.

Roughly speaking, by leaving the dots in the pixels that do not produce color as the background color, if some shape is drawn on the background, the original shape can be displayed superimposed behind the color image. can.

■Pixel arrangement means As a means of drawing (painting) color images, in advance,
Determine the method and number of pixels to be arranged.

FIG. 3 shows a basic example of a pixel arrangement. In FIG. 3, there are 1 pixel 21 in FIG. 3 (A>, 4 in FIG. 3 (B), and 16 in FIG.
One unit (
22 (hereinafter referred to as paint unit). In addition, in FIG. 3, 23 represents the center position of the paint unit 22.

FIG. 4 shows the arrangement of FIG.
The outline has been transformed to draw an arc according to the display. Thus, determining the pixel arrangement corresponds to selecting the shape and dimensions of the paint unit 22.

FIG. 5 shows the concept of a roller for painting as a modification of the pixel arrangement.

In FIG. 5 (A>, 31 is a conceptual paint roller, 32.33 is the starting point coordinates (xs, ys) and ending point coordinates (Xe
, ye), 34 indicates the paint width. Further, FIG. 5(B) is a diagram showing a row of display dots painted by the paint roller 31, where 35 indicates a non-colored dot and 36 indicates a colored dot. In this case, by determining the paint width direction - the order in which the display dots in the rows are colored or non-colored, and the moving direction of the paint roller 31 (in the direction of the arrow in the figure), the arrangement of colors in each row to be colored is sequentially shifted. It is possible to create colored rows arranged vertically, diagonally, or intersectingly.

■Method of saving to database FIG. 6 is a diagram showing a figure consisting of a line drawing and an image.

In the figure, 41 is a paint unit consisting of a collection of four pixels, 42 is a pixel, and 43 is a paint unit 4.
1, 44 represents the line segment, and 45.46 represents the starting point coordinates (xs, ys) and ending point coordinates (xe, ye) of the line segment 44. The position of the paint unit 41 is specified as (xb, yb) on the same x-y coordinate system scale as the line segment.

Figure 7 shows the line segment 44 and paint unit 41 shown in Figure 6.
is displayed on a color CRT display 47. 7(A> is the case where the entire figure is displayed on the CRT display 47, and FIG. 7(B) is the case where the entire figure is displayed on the CRT display 47.
This shows a case where the entire figure is enlarged and a portion of the figure is displayed on the CRT display 47.

Here, the data of the figure shown in FIG. 6 can be expressed as follows.

(1) Coloring information of one pixel 42: Expressed by the following parameters.

PIXEL = (PRED, PGREEN, PB
LUE, PTYPE) PIXEL: Pixel coloring information PRED: Number of dots to be colored red (RED) among pixels (O~16) PGR[EN: Number of dots to be colored green (GREEN) among pixels (O~ 16) P8 [uE: Hixel Nouchi, Blue (BLUE)
Number of dots to be colored (0 to 16) (2) Position and size of paint unit 41: Expressed by the following parameters.

BLUSH-(XB, VB, PIXEL, TYP
E, 5IZE) BLUSH: Paint unit information PIXEL: Pixel color information TYPE: Pane l-shape (circular or rectangular) XB, 'l'8: Coordinates of the center point of the paint unit 5I2E
: Size of paint unit (3) Data of line segment 44: Represented by the following parameters.

LINE= (XS, YS, XE, YE
, LFONT, LCOLOR>LINE:
Line segment information XS, YS: Line segment starting point coordinates By storing information corresponding to units in a database, these data can be reproduced on a color CRT display by moving, rotating, or scaling the coordinates in the same way as line drawing information.

[Effects of the Invention] As explained above, according to the present invention, a collection of dots on a CRT display is treated as one pixel,
By determining the color of the dot in each pixel and the number of colored dots, we can define the color development of one pixel and display a collection of these pixels as an image on a CRT. It is possible to express colors that cannot be seen in other colors.

By expressing this information such as the coloring information and the position of the coloring point using the method described above, it can be stored in the database in the same way as the parameters of the line drawing figure. can be translated, rotated, or scaled and reproduced on a CRT.

Roughly speaking, image data that was conventionally stored as the state of CRT display memory can be expressed as a collection of pixels determined by several numerical parameters, so it can be expressed in the same way as general data files that include line drawings. It becomes possible to handle computers of different types.

In particular, in the present invention, since a color image is handled as a collection of pixels having positions and sizes, the conventional CAp method, which handles line drawing figures as a collection of individual line segments and arc figures, It is possible to provide a CAD system that can handle image data in the same way.

[Brief explanation of drawings]

1 to 7 are diagrams showing an embodiment of a CAD system according to the present invention. FIG. 1 is a plan view showing a color CRT display and 4×4 dot pixels used in the example, and FIG. 2 is a plan view showing one pixel with different colors.
(B) uses dots colored only in the three primary colors.
) shows the state in which mixed colored dots are used. Figure 3 is a plan view showing a basic example of pixel arrangement; (A) shows one pixel, (B) shows four pixels, and (C) shows a color image by arranging 16 pixels in a square. FIG. 4 is a plan view showing an arrangement in which the outline of FIG. 3 is transformed into an arc, and (A> to (
C) respectively correspond to (A> to (C)) in FIG. 3. FIG. 5 is a diagram showing a modified example of the pixel arrangement;
> is a perspective view showing a conceptual paint roller and a coordinate range of paint, and (8) is a plan view showing a row of display dots painted by the paint roller. FIG. 6 is a coordinate plan view showing an example of a figure consisting of a line drawing and an image;
Figure 7 shows the line segments and paint units shown in Figure 6 in color C.
It is a plan view showing a case where it is displayed on an RT display,
(A> shows the case where the entire figure is displayed, and (B) shows the case where a part of the enlarged figure is displayed. Figure 8 shows the combination of the three primary colors of the CRT display and the colors expressed by them. It is a diagram showing the relationship. 11.47...CRT display, 12.21°4
2... Pixels, 13... Dots that develop purple, 14.35... Dots that do not develop color, 15... Dots that develop red, 16... Dots that develop blue. 22. 41...Paint unit, 31...Paint roller, 36...Colored dot, 44.
··line segment.

Claims (1)

[Claims] Multiple dots on a CRT display are treated as one pixel, and the color of each pixel is determined by selecting the color of the dots in each pixel and the number of dots of each color, and the color is created by a collection of such pixels. Computer graphic processing characterized by comprising means for displaying an image, and means for storing color image information based on data on the color development, position, and display range of each pixel constituting the color image in a database together with line drawing information. system.