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US 7,925,101 B2Granted
Apparatus for controlling image compression
AssigneeHimax Technologies Limited
InventorSheng-Chun Niu
Life of this patent
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Abstract
A method and apparatus for controlling image compression is disclosed. A current block of pixels is firstly compressed. The average pixel size of the compressed current block is averaged with an average pixel size of preceding block or blocks to obtain an average value. The compressed current block is passed as output, if the average value is not greater than a target value; otherwise a portion of the current block prior to compression is truncated and then passed as the output.
Claims7
Apparatus for controlling image compression, comprising:
- a buffer for temporarily storing a current block including a plurality of pixels;
- a compressor for compressing the current block;
- a compression controller obtaining an average value of an average pixel size of the compressed current block and an average pixel size of preceding compressed or truncated block or blocks, and passing the compressed current block as output, if the average value is not greater than a target value;
- and
- a truncator for truncating a portion of the uncompressed current block if the average value is greater than the target value, the truncated uncompressed current block being then passed as the output under control of the compression controller.
2 more elements
Dependencies are inferred from the claim text.