Verfahren und Anordnung für ein einfaches und/oder Mehrstufen-Störreduktionssystem in Bildern
摘要
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>
申请公布号
DE69208284(T2)
申请公布日期
1996.09.19
申请号
DE1992608284T
申请日期
1992.05.08
申请人
PHILIPS ELECTRONICS N.V., EINDHOVEN, NL
发明人
RAMINEZ, BORIS ESCALANTE, NL-5656 AA EINDHOVEN, NL;MARTENS, JEAN BERNARD OSKAR SUZANNA, NL-5656 AA EINDHOVEN, NL