Apparatus and method for image coding
An image coding technique capable of realizing a high speed coding processing for a mixed image with less a visual distortion. The image coding apparatus includes: plural scan units each having a scan apparatus scanning an original image to be encoded according to a prescribed scan sequence and piec...
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| Format | Patent |
| Language | English |
| Published |
04.08.2009
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| Online Access | Get full text |
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| Summary: | An image coding technique capable of realizing a high speed coding processing for a mixed image with less a visual distortion. The image coding apparatus includes: plural scan units each having a scan apparatus scanning an original image to be encoded according to a prescribed scan sequence and piecewidth linear approximation apparatus dividing a one-dimensional original image generated by scanning the original image with the scan apparatus into plural intervals so that an accumulated square error or a dispersion of pixel values in each interval is a prescribed threshold value or less to generate one-dimensional approximation image data obtained by approximation of pixel values by the average value of pixel values in the intervals, which correspond to each of plural scan sequences different from one another; and optimal scan selecting apparatus comparing the numbers of intervals obtained by dividing of the piecewidth linear approximation apparatus of the scan units to thereby select one dimensional approximation image data having a minimum number of intervals. |
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