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Conversion Logic From Color Screen Image to Monochrome Screen Image

IP.com Disclosure Number: IPCOM000036258D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Iwami, T: AUTHOR [+2]

Abstract

This system converts screen output image from color to monochrome for compatibility. A color application software can be used on a monochrome screen by using this system's conversion logic.

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Conversion Logic From Color Screen Image to Monochrome Screen Image

This system converts screen output image from color to monochrome for compatibility. A color application software can be used on a monochrome screen by using this system's conversion logic.

The new PC text color application software trend is "WINDOW" function. This system makes it possible to use such application software on the monochrome screen and monochrome printer output.

Considering some color figures which can be displayed on the color screen as shown in Fig. 1A, this system converts such original color images to the monochrome ones as shown in Fig. 1B. That is, it generates lines in color of the foreground on the same position of the border between different color areas. Accordingly, the border is displayed in black.

The block diagram in Fig. 2 shows this conversion logic.

(Image Omitted)

This system has a 1 raster line buffer for retaining PIXEL data of the previous raster to be compared with that of the current raster. It also has a latch for retaining PIXEL data of the previous dot to be compared with that of the current dot. When the PIXEL data of the current line or the current dot is different from that of the previous line or the previous dot, the monochrome data of black is generated. The timing generator is for synchronizing each function block.

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