JPS62144235A - Hard copy system - Google Patents

Abstract

PURPOSE:To obtain a hard copy even with such a picture where multi-color patterns are superimposed to each other by extracting the changing point of a memory pattern stored in each frame memory and synthesizing these changing points only. CONSTITUTION:The changing points of memory patterns are extracted out of frame memories 2a-2c respectively and shown in the three primary colors like 3a, 3b and 3c respectively. In other words, the contour of each pattern is extracted. Here the changing points of those three primary colors are synthesized and the monochrome pictures are obtained in the form of line pictures showing only the contour of each pattern. These monochrome pictures are printed out. Thus it is possible to obtain a hard copy 4 with which the contents of each pattern can be satisfactorily understood with no loss of the contour discriminating each pattern even with such a color picture 1 where multi-color patterns are placed on each other.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention prints a color image displayed on a color bitmap display used in a personal computer or the like as a monochrome image using a printer (hereinafter referred to as a hard copy). (description) method.

[Conventional technology]

There are various types of color bitmap displays, but the ones generally used in personal computers are red (hereinafter referred to as R) and green (referred to as R), as shown in Figure 2.
It has frame memories 5, 6.7 for three primary colors: G (hereinafter referred to as G) and blue (hereinafter referred to as B), and by combining these and sending them to a CRT, a color composite image 8 is obtained.

When trying to obtain a monochrome hard copy of an image displayed on such a color bitmap display, conventionally, the binary memory patterns of the R, G, and B frame memories are OR-combined, and A monochrome hard copy of a color image was obtained by creating a printout pattern and printing out the set portions of the pattern as black and the unset portions as white.

[Problem that the invention seeks to solve]

However, according to the above-mentioned conventional method, even if the image is multicolored (indicated by different hatching) as shown by 9 in FIG. 3, if the image has separate shapes, Although a good hard copy can be obtained, for example, in the case of an image with overlapping multicolored figures as shown at 11 in Figure 4, the result will be a hard copy in which all the shapes overlap as shown at 12 in the same figure. , important information of the original image,
That is, there is a problem in that the contours that distinguish each figure are lost, making it impossible to understand the contents.

This invention has been made to solve the above-mentioned problems, and aims to provide a hard copy method that allows the content of images to be fully understood even when the images are made up of overlapping multicolored figures.

[Means for solving problems]

The hard copy method according to the present invention extracts changing points of a memory pattern stored in each frame memory, and synthesizes only these changing points to obtain a hard copy.

[Effect]

In this invention, only the outline of each memory pattern is obtained by extracting the changing points of the memory pattern of each frame memory, and by combining these, a line drawing formed by the outline of each memory pattern is obtained. You can get a copy.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram for explaining the principle of the embodiment. In the figure, 1 is a color image displayed on a CRT;
For example, 1a in the image is R, 1b is G, lc is R, G,
If the composite color is B, this color image 1 will be 2a, 2b,
It is composed of memory patterns of three frame memories as shown in 2c. Each of the above frame memories 2a to 2c
When the changing points of each memory pattern are extracted, these are the color changing points of each of the three primary colors as shown by 3a, 3b, and 3c. In other words, the outline of each figure has been extracted. Here, if we OR the changing points of these three primary colors, we get 4
It is possible to obtain a pattern of only color change points of the original color image 1 as shown in , that is, a monochrome image as a line drawing showing only the outline of each figure. Therefore, if you print this out, even if it is a color image with overlapping multicolored patterns like 1, important information, that is, the contours that distinguish each figure, will not be lost, and you will get a hard copy that allows you to fully understand the contents. be able to.

In the above embodiment, a color bitmap display consisting of three frame memories was described, but even if the frame memory has more planes,
On the contrary, it does not matter if it decreases.

Further, in the above embodiment, a dot-colored bitmap display has been described, but this can also be applied to block-colored images such as videotex.

〔Effect of the invention〕

As described above, according to the present invention, the changing points of the memory pattern stored in each frame memory are extracted and only the changing points are combined to obtain a hard copy.
This has the effect of producing a hard copy that allows the content to be fully understood, even for images with overlapping multicolored figures.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the principle of an embodiment of the present invention;
The figure is a conceptual diagram of a general color bitmap display, and FIGS. 3 and 4 are diagrams showing examples of hard copies according to the prior art. ■...Color image, 2a-2c...Frame memory, 3a-3c...Memory pattern change points, 4...
Monochrome image.

Claims (1)

[Claims] In a hard copy method that prints a color image synthesized from memory patterns stored in multiple frame memories for each color as a monochrome image, changing points of the memory patterns stored in each frame memory are extracted and only these changing points are printed. A hard copy method characterized by combining and printing.