发明名称 |
Adaptive coring for video peaking |
摘要 |
A processor for enhancing an input luminance signal including: a means for calculating a chroma edge value associated with the input luminance signal; a means for measuring a luminance gradient associated with the input luminance signal; a peaking filter for processing the input luminance signal; a gain adjustment circuit having a gain function that is adjustable relative to the calculated chroma edge value, the gain adjustment circuit being operable to adjust the magnitude of the output of the peaking filter wherein: in a first range of luminance gradients, the output is an attenuated version of the input; in a second range of luminance gradients the output is directly proportional to the input; in a third range of luminance gradients, the output is inversely proportional to the input; wherein said enhanced luminance signal is the sum of the input and output of the peaking filter. <IMAGE> |
申请公布号 |
EP1480449(A3) |
申请公布日期 |
2004.12.08 |
申请号 |
EP20040102235 |
申请日期 |
2004.05.20 |
申请人 |
STMICROELECTRONICS ASIA PACIFIC PTE LTD. |
发明人 |
HUI, LUCAS Y. W.;CHIANG, PATRICIA WEI YIN |
分类号 |
G06T5/00;G06T5/20;H04N5/14;H04N5/21;H04N9/77 |
主分类号 |
G06T5/00 |
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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