发明名称 |
FALSE CONTOUR CORRECTING APPARATUS AND METHOD |
摘要 |
<p>A false contour correcting apparatus is capable of removing a false contour in an image based on a digital image signal while avoiding such a side effect caused by false contour correction where noises negatively effecting the display occur on a screen. Therefore, in the false contour correcting apparatus according, a double bit change detection circuit detects as a double bit change a signal value change which is twice a minimum quantization unit in a digital image signal, and outputs a double bit change detection signal representing the position of the double bit change. A signal correction circuit corrects the double bit change in the digital image signal into two one-bit changes on the basis of the double bit change detection signal. Consequently, a false contour corresponding to a portion where the double bit change exists is removed.</p> |
申请公布号 |
EP1072153(A1) |
申请公布日期 |
2001.01.31 |
申请号 |
EP19990914746 |
申请日期 |
1999.04.14 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KAWABATA, MINORU;KAGEYAMA, ATSUHISA;TAKESHIMA, MASAHIRO |
分类号 |
H04N5/14;H04N5/208;H04N5/21;H04N5/44;(IPC1-7):H04N5/14 |
主分类号 |
H04N5/14 |
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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