JPS62289888A - Image processing system - 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] 3. Detailed Description of the Invention Industrial Application Field The present invention relates to a method for coloring an image when an image created on a computer display is converted into a video signal and reproduced. be.

2. Description of the Related Art Conventionally, as an inexpensive still image reproduction system, a graphic image is created on an RGB display of a personal computer, and this image data is converted into serial data in a predetermined format and recorded on a cassette tape.
An image reproducing device is being considered that reproduces images from this cassette tape on a home television using a personal computer or a dedicated graphic reproducing device.

FIG. 3 is a schematic block diagram showing an example of the above-mentioned image reproducing device, in which 1 is an image scanner, 2 is a personal computer, 3 is an ROB display, 4 is a tape format processor, 5 is a cassette deck, and 6 is a cassette tape. , and 8 are graphic playback devices, and 8 is a home television. That is, the image scanner 1 imports the contour original into the memory of the computer, and the R
II colored on the GB display! The L1 image data is converted into predetermined serial data by a tape format processor 4, and this data signal is recorded onto a cassette tape 6 by a cassette deck 6. The image data recorded on this cassette tape is read by a graphic reproduction device 7 including a cassette reproduction mechanism and converted into a video signal, and the original image is reproduced and displayed on a home television 8.

Problems to be Solved by the Invention By the way, the types of colors that can be colored on a ReB display are black, blue, red, magenta, green, and cyan.

It is well known that there are only eight colors, yellow and white, but in order to produce more intermediate colors, two of the eight colors are used in a checkerboard pattern for each dot in the graphic coordinates, as shown in Figure 2. The method of arranging colors is often used as a simple method.

In Figure 2, a closed area is colored on the graphic coordinates, 2 shows the structure of the graphic coordinates, and an area of one dot which is an element.For example, red and yellow are arranged in a checkered pattern to approximately approximate orange. I'm letting you do it. Images created in this way have good horizontal brightness rise characteristics on an RGB display, so they look almost orange when viewed from a distance, but when converted to a video signal and viewed on a regular TV, the horizontal brightness rises well. The rising characteristics deteriorate, and a shadow appears at the boundary of each dot, giving the appearance of horizontal stripes. This phenomenon becomes particularly noticeable when a color with a high luminance level is mixed with a color with a low luminance level.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has changed the method of mixing Tomoe dots to obtain intermediate colors, not in a checkerboard pattern but in a vertical pattern in which two colors are arranged alternately in each horizontal line. The same color is arranged in the line direction.

Effect of the Invention The present invention uses the above means to take into account the color phase shift due to changes in the brightness of the video signal, and by arranging the same colors in the vertical direction, even if vertical stripes are visible on an RGB display, color stripes are not visible on a TV screen using a video signal. This will reduce the appearance of the damage.

EXAMPLE FIG. 1 shows an example of a dot arrangement of intermediate colors according to the present invention. Similar to FIG. 2, 1 is a closed area to be colored, and 2 is an area of 1 dot on the graphic coordinates. That is, all the colors on the vertical axis are the same, and two colors (red and yellow in the example) are arranged alternately for each vertical line to produce an intermediate color.

If you convert this image to a video signal and play it on your TV,
A smoother intermediate color (orange in the example) is obtained as a whole than in the case of FIG.

However, even in this case, the combination of black and white with extremely large brightness changes has the disadvantage that it does not become gray and the overall appearance appears dark green, but if this is treated as dark green, the combination of black and green shown in Figure 2 causes the dark green color. The result is a dark green color that is much smoother than the original color.

Also, to create gray using the method shown in Figure 1, if you combine magenta and green using the video conversion material, the overall appearance will be gray, so it will be much more beautiful than the gray that is created by combining black and white using the method shown in Figure 2. There is also the side effect of creating a gray color.

It is also possible to create intermediate colors by adding brightness level information to each color of R (, B), but this method requires a huge amount of data and takes a long time to play on media with low recording density such as cassette tape. However, the method of the present invention can produce intermediate colors at a lower cost.

It goes without saying that the coloring according to the arrangement shown in FIG. 1 can be easily realized by a computer program.

Effects of the Invention According to the present invention, two of the eight colors composed of RGB
By simply arranging the colors alternately in the horizontal direction and arranging the same colors in the vertical direction, approximately 20 smooth intermediate colors other than the above 8 tomoes can be reproduced on a television after converting the video signal.

[Brief Description of the Drawings] Fig. 1 is a schematic diagram showing the dot arrangement on the graphic coordinates of an intermediate color according to the dot composition of the present invention, and Fig. 2 is a schematic diagram showing the dot arrangement on the graphic coordinates of an intermediate color according to the conventional dot composition. 3 are block diagrams showing the configuration of a general image reproducing device. 1... Image scanner, 2... Personal computer, 3... RGB display, 4... Tape format processor,
5...Cassette deck, 6...Cassette tape, 7...Graphic playback device, 8...
...TV receiver. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] An image playback device that records graphic image data created on an RGB display of a personal computer on a cassette tape, converts the data on the cassette tape into a video signal with a graphic playback device, and plays the graphic image on a television screen. In the above RG
An image processing method characterized by arranging arbitrary two colors out of eight RGB colors alternately in the horizontal axis direction on graphic coordinates and arranging the same color in the vertical axis direction in order to create a neutral color on a B display. .