发明名称 |
RAPID THUMBNAIL IMAGE RECONSTRUCTION OF DCT COMPRESSED IMAGE DATA |
摘要 |
Thumbnail images are constructed out of a baseline JPEG compressed image signal using only the differential DC values while suppressing all non-zero AC values. The resulting image has reduced size which is sufficient for many scanning purposes. The differential DC values are used to obtain quantized DC values which are dequantized and biased to get unsigned numbers. |
申请公布号 |
WO9422108(A1) |
申请公布日期 |
1994.09.29 |
申请号 |
WO1994US02914 |
申请日期 |
1994.03.17 |
申请人 |
ZORAN CORPORATION |
发明人 |
RETTER, RAFAEL;SHENBERG, ISAAC |
分类号 |
G06T9/00;H04N7/26;H04N7/30;(IPC1-7):G06K9/36;G06K9/46 |
主分类号 |
G06T9/00 |
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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