ImageFilterinFrequencySpace
代码说明：
目的是改善影像质量，包括去除高频噪声与干扰，及影像边缘增强、线性增强以及去模糊等。分为低通滤波（平滑化）、高通滤波（锐化）和带通滤波。(The purpose is to improve the image quality, including the removal of high frequency noise and interference, and image edge enhancement, linear enhancement and deblurring. Into a low-pass filter (smoothing), high-pass filtering (sharpening) and bandpass filtering.)
文件列表：
Image Filter in Frequency Space
...............................\chap04_02.m,2088,2006-04-23
...............................\dftfilt.m,911,2006-04-09
...............................\dftuv.m,663,2006-04-09
...............................\example04_02.m,3755,2009-05-21
...............................\example04_04.m,1387,2006-04-09
...............................\example04_06.m,753,2006-04-09
...............................\example04_07.m,969,2006-04-23
...............................\example04_08.m,1524,2006-04-23
...............................\gscale.m,2037,2006-04-09
...............................\hpfilter.m,566,2006-04-08
...............................\lpfilter.m,1108,2006-04-09
...............................\paddedsize.m,520,2006-04-09
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