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

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

H - Electricity

04

N

354/236.1

H04N 1/21 (2006.01) H04N 1/64 (2006.01)

Patent

CA 1269174

ABSTRACT OF THE DISCLOSURE A picture data memory system includes a page memory for storing both color gradation and black/white concentration data of a picture to be processed. A color scanner produces either color gradation data or black/white concentration data of a draft picture scanned thereby. Since the resolution of color picture data can be much lower than the resolution of black and white picture data, color picture data is scanned at a resolution of 3 lines/mm while a black and white picture is scanned at a resolution of 12 lines/mm. The number of bits of color gradation data and black and white concentration data written into each address of the page memory are set to be equal to each other, so that 4 picture elements of 4 bits of black and white data are stored in each address of the page memory while 15 bits + 1 redundant bit are stored for each picture element of color data in a particular address of the page memory.

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