发明名称 |
METHOD AND APPARATUS FOR EDGE DETECTION |
摘要 |
An edge detection technique combines a low-pass second derivative of an image signal, a low-pass first derivative of the image signal, and an estimation of edge frequency. The edge frequency estimation is preferably based on a ratio of a third to a first low-pass derivative of image signal. The image signal is preferably a luminance signal. |
申请公布号 |
WO0152188(A2) |
申请公布日期 |
2001.07.19 |
申请号 |
WO2000EP13228 |
申请日期 |
2000.12.27 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
HE, HAIYAN;JANSSEN, JOHAN |
分类号 |
G06T7/60;G06T5/00 |
主分类号 |
G06T7/60 |
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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