Image analysis – Histogram processing
Reexamination Certificate
2004-07-22
2009-06-23
Dang, Duy M (Department: 2624)
Image analysis
Histogram processing
Reexamination Certificate
active
07551776
ABSTRACT:
Histogram circuitry is provided to increment a tonal value tally corresponding to received pixel data without immediately writing the incremented tally back to a histogram table within a main memory. Instead, the tonal value and corresponding incremented tonal value tally are stored in a temporary memory of the histogram circuitry. Since received pixel data has a high likelihood of having the same tonal value as recently received pixel data, the tonal value of the received pixel data is first checked for a match with one of the recently received tonal values stored in the temporary memory. If the received tonal value is present in the temporary memory, there is no need to access the histogram table within the main memory to retrieve the corresponding tally. The tally corresponding to the received tonal value can simply be incremented in the temporary memory of the histogram circuitry.
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Dyke Phil Van
Jeffrey Eric
Dang Duy M
Seiko Epson Corporation
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