发明名称 |
Method and apparatus for image compression and decompression |
摘要 |
An image compression method for compressing groups of pixel data, including the following steps: MSB portions and LSB portions of the pixel data are compressed separately. Further, the LSB portions are grouped according to their associated MSB portions so that similar pixels are compressed together to gain higher a compression ratio. Some LSB portions are truncated to ensure a compression ratio. When performing compression, enhanced variable-length coding is adopted that predicts more accurate dividers by considering weighted combination of adjacent pixels. The quotient of each groups of compression portion is predicted and coded accordingly.
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申请公布号 |
US7466867(B2) |
申请公布日期 |
2008.12.16 |
申请号 |
US20040997048 |
申请日期 |
2004.11.26 |
申请人 |
TAIWAN IMAGINGTEK CORPORATION |
发明人 |
SUNG CHIH-TA STAR;CHENG CHIH-SHENG;LAN YIN-CHUN |
分类号 |
G06K9/00;G06K9/36;G06K9/46;H03M7/40;H04N1/413;H04N7/12;H04N11/02;H04N11/04 |
主分类号 |
G06K9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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