Method and apparatus for differential run-length coding
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United States of America Patent
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Dec 23, 1986
Grant Date -
N/A
app pub date -
Dec 31, 1984
filing date -
Dec 31, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for data compression in a digital imaging process is disclosed. More specifically a method is disclosed whereby a more efficient reduction of memory space is obtained when a dithered image is of the so called 'grey scale' type. The binary bits representing the pixels of the dithered image are differentiated to obtain groups of ones or zeros, so that these groups may be represented by a code, thereby saving memory space. One embodiment uses the Exclusive OR function in the differentiation process.
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