| 摘要 |
An image encoding apparatus generate encoded data having a fixed length L which is less than or equal to mxn bits and an integral multiple of 32 by mxn pixel block, while resolution information and color information are excellently maintained. For this purpose, a block generation unit inputs image data by mxn pixels. A 2-color extraction unit extracts representative colors C0 and C1 from the input block image data. An identification information detection unit generates mxn items of identification information each identifying each pixel in the block as a pixel approximate to one of the colors C0 and C1. An identification information deletion unit deletes the items of identification information in corresponding positions based on a deletion pattern stored in a deletion pattern memory. A packing unit packs the colors C0, C1 and the identification information after deletion, and outputs the data as encoded data.
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