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Compression system for gradation picture data

阅读:59发布:2022-06-21

专利汇可以提供Compression system for gradation picture data专利检索,专利查询,专利分析的服务。并且PURPOSE: To improve the compression efficiency and the picture quality accuracy by securing the data on the Laplacean value for each block with the (y) directional thinning to leave a relevant block part as it is if this part has a level higher than a certain one and thinning other block parts.
CONSTITUTION: A differential Laplacean data memory 9 related to the (y) directional thinning of the gradation picture data is connected to a vector transformation circuit 4. While a restoration table memory 10 is connected to a restoration circuit 7. For the (y) directional thinning, the relevant block part is left as it is if this part has a level higher than the value set based on the data on each block among those data that are transformed into vectors toward (x) for each plane, that is, if a big difference of levels is produced. Thus both the compression efficiency and the picture quality accuracy are improved.
COPYRIGHT: (C)1988,JPO&Japio,下面是Compression system for gradation picture data专利的具体信息内容。

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