Halftone picture processing apparatus
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United States of America Patent
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-
Jan 26, 1988
Grant Date -
N/A
app pub date -
Jan 8, 1986
filing date -
Jan 10, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A halftone picture processing apparatus has devices for dividing and storing an image signal in the form of blocks each of which consists of a plurality of pixels, for setting at least one path for accessing the pixels in each block, calculating the number of changes in image signals which satisfies predetermined conditions, the changes occurring between succeeding pixels in each block along the path, and detecting a halftone region in accordance with the number of changes in image signals.
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