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    • 1. 发明授权
    • Image processing method for correcting a target pixel using emphasizing
and smoothing components
    • 使用强调和平滑分量校正目标像素的图像处理方法
    • US5390264A
    • 1995-02-14
    • US987220
    • 1992-12-08
    • Hideshi IshiharaHaruo YamashitaTsumoru Fukushima
    • Hideshi IshiharaHaruo YamashitaTsumoru Fukushima
    • H04N1/409G06T5/20G06K9/40
    • G06T5/20
    • In an image processing method for correcting a target pixel using emphasizing and smoothing components, a microcomputer stores the input image signal into an image memory, and generates the enhancement coefficient k data in the enhancement coefficient table memory using a function with an input/output characteristic whereby the output is a simple increasing value when the input is approximately zero. Using a first difference, which is the difference of the target pixel signal minus the signal of the reference pixel positioned on a first direction, the enhancement coefficient k is obtained by referencing the enhancement coefficient table, and the target pixel is enhanced proportionally to the enhancement coefficient k and the first difference. The target pixel is also gradated or smoothed in proportion to the enhancement coefficient k and the second difference, which is the target pixel signal minus the average of the signals of the second and third reference pixels, which are the reference pixels in the directions perpendicular to the first direction and on opposite sides of the target pixel. The target pixel signal is corrected by repeating this process for each of the reference pixels positioned on the four directions surrounding the target pixel, and the corrected image signal is stored to the image memory. The enhanced image signal is obtained by repeating this process for all input image signals.
    • 在使用强调和平滑分量校正目标像素的图像处理方法中,微计算机将输入图像信号存储到图像存储器中,并且使用具有输入/输出特性的函数在增强系数表存储器中生成增强系数k数据 从而当输入大约为零时,输出是简单的增加值。 使用作为目标像素信号减去位于第一方向上的参考像素的信号的第一差异,通过参考增强系数表来获得增强系数k,并且与增强成比例地增加目标像素 系数k和第一个差值。 与目标像素信号减去第二和第三参考像素的信号的平均值成比例的增强系数k和第二差分,目标像素也是渐变或平滑的,它们是垂直于 目标像素的第一方向和相对两侧。 通过对位于围绕目标像素的四个方向上的每个参考像素重复该处理来校正目标像素信号,并将校正后的图像信号存储到图像存储器中。 通过对所有输入图像信号重复该处理来获得增强图像信号。