发明名称 |
SYSTEM UND VERFAHREN ZUR VIDEOINHALTSANALYSE UNTER VERWENDUNG ERMITTELTER TEXTE IN VIDEORAHMEN |
摘要 |
<p>An image processing device and method for classifying symbols, such as text, in a video stream employs a back propagation neural network (BPNN) whose feature space is derived from size, translation, and rotation invariant shape-dependent features. Various example feature spaces are discussed such as regular and invariant moments and an angle histogram derived from a Delaunay triangulation of a thinned, thresholded, symbol. Such feature spaces provide a good match to BPNN as a classifier because of the poor resolution of characters in video streams.</p> |
申请公布号 |
DE69935504(D1) |
申请公布日期 |
2007.04.26 |
申请号 |
DE1999635504 |
申请日期 |
1999.12.24 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
AGNIHOTRI, LALITHA;DIMITROVA, NEVENKA;ELENBAAS, JAN H. |
分类号 |
G06F17/30;G06Q30/00;G06F19/00;G06K9/32;G06T1/00;G06T7/40;H04N5/278;H04N5/91 |
主分类号 |
G06F17/30 |
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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