Method for image reduction processing according to criterion points
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United States of America Patent
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Jun 19, 1990
Grant Date -
N/A
app pub date -
Jan 23, 1989
filing date -
Jun 3, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Image reduction processing of a given original image is effected by determining the brightness of each picture element in a resultant reduced image in accordance with the numbers of black and white pixels in an intermediate matrix image obtained by quantizing the original image. When the black and white pixels in the quantized intermediate matrix image are equal, the aforesaid brightness is determined according to a prescribed criterion matrix pattern having a criterion point, thereby to obtain the reduced image on a display or the like with high fidelity to the original image.
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