Picture data memory system for storing both black and white and

Details Picture data memory system for storing both black and white and Picture data memory system for storing both black and white and

1991-01-31

1992-06-16

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 75, H04N 146

Patent

active

051228726

ABSTRACT:
In view of the memory or storage disadvantage inherent in conventional picture data memory systems, a picture data memory system provides a system with simplified memory control which equalizes the amounts of the color and black/white picture element data by reducing the resolution of the color picture element data (a picture element representing an area scanned by at least one CCD element) to one-quarter of the resolution of black/white picture element data. The picture data memory system constitutes memory locations having a bit size in accordance with the resolution of the color picture when reproduced by the color printer. By doing so, the numbers of bits are equal for the picture element data of both the color and black/white pictures, thereby allowing the storing of color and black/white picture element data in the memory that has a storage capacity that is no greater than a memory storing only black/white picture data. This system includes picture memory for storing binary data representing both color gradation data and black/white concentration data of each picture element; a controller for producing either a color or a black/white mode select signal; a scanner for producing either color gradation data or black/white concentration data; a first buffer memory for storing color gradation data; a second buffer memory for storing black/white concentration data; and a selector for selecting data from either the first or the second buffer memory to be written into a specific address of the picture memory means. The number of bits representing color gradation data or black/white concentration data written into each address of the picture memory are set to be equal to each other.

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