Facsimile and static presentation processing – Natural color facsimile – Specific image-processing circuitry
Patent
1992-06-22
1994-10-04
Coles, Sr., Edward L.
Facsimile and static presentation processing
Natural color facsimile
Specific image-processing circuitry
358426, 3582611, 382 56, H04N 146, H04N 141
Patent
active
053531329
ABSTRACT:
The type of color image is identified on the basis of a distribution of color information for each color. A plurality of different types of data compression algorithms prepared beforehand are changed according to the results of the identification. Preferably, the difference between the maximum value and the minimum value of each picture element of respective color separation data of a color image is determined, and further, a histogram of frequency of color information obtained for each color is determined. On the basis of the histogram, the type of the color image is identified by the fact that whether or not the histogram contains a peak greater than a predetermined value or whether or not the deviation of the histogram is greater than a predetermined value.
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Canon Kabushiki Kaisha
Coles Sr. Edward L.
Lee Thomas D.
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