发明名称 |
Method and device for single and/or multi-scale noise reduction system for pictures. |
摘要 |
<p>For noise reduction in a two-dimensional image it is sampled according to a regular array of window sampling positions. The image function is then subjected to multiplication by a window function and conversion to a weighted sum of polynomials according to ascending order. If the next-to-lowest order coefficient signals a sufficient intensity variation in the window, all coefficients are used for subsequent inverse polynomial transform. Otherwise, predominantly only the lowest order coefficient is used therefore. In a cascaded organization, the lowest order coefficient is viewed as itself representing the image information and likewise processed in a forward-inverse polynomial transform organization with respect to an upscaled-size window. The result is then used in a next lower cascade level in lieu of the unprocessed lowest order coefficient itself. <IMAGE></p> |
申请公布号 |
EP0513906(A2) |
申请公布日期 |
1992.11.19 |
申请号 |
EP19920201305 |
申请日期 |
1992.05.08 |
申请人 |
N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
RAMINEZ, BORIS ESCALANTE;MARTENS, JEAN BERNARD OSKAR SUZANNA |
分类号 |
G06F17/10;G06T5/00;G06T5/20 |
主分类号 |
G06F17/10 |
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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