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21. 发明授权

US5845017A Digital image processing method for degraining of film images using distance weighted averaging of target pixel code values 失效
标题翻译：使用目标像素码值的距离加权平均来降低胶片图像的数字图像处理方法
公开(公告)号：US5845017A
公开(公告)日：1998-12-01
申请号：US767902
申请日：1996-12-17
申请人： Michael P. Keyes
发明人： Michael P. Keyes
IPC分类号： G06T5/20 , H04N1/58 , G06K9/40 , G06T5/00 , H04N1/409
CPC分类号： G06T5/20 , H04N1/58
摘要： A method of digital image processing for degraining (smoothing) of images based on selected averaging of pixels in a neighborhood of pixels surrounding a target pixel to be recalculated. Improvement in the application of the selected average method to images of higher graininess such as might be obtained from higher speed films is achieved by weighting the difference in code values between each neighborhood pixel and the target pixel in accordance with a function that is related to physical distance between the neighborhood pixel and the target pixel. After all target pixels are recalculated using a selected fraction of pixel elements based on their distance weighted difference values, the process is iterated for each target pixel "n" number of times to achieve a desired relative code value of the target pixel to surrounding background pixel code values whereupon a final unweighted averaging operation is performed to achieve the final recalculated value of the target pixel.
摘要翻译：一种用于基于要重新计算的目标像素周围的像素的周围的像素的选择平均来对图像进行去图像（平滑化）的数字图像处理的方法。通过根据与物理上相关的功能对每个相邻像素和目标像素之间的代码值的差进行加权来实现将所选择的平均方法应用于更高粒度的图像的改进，邻域像素与目标像素之间的距离。在使用基于其距离加权差值的所选像素元素重新计算所有目标像素之后，针对每个目标像素“n”次迭代该过程以实现目标像素到周围背景像素的期望相对代码值代码值，由此执行最终的未加权平均操作以实现目标像素的最终重新计算值。

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