频域滤波：要进行频域的图像增强，滤波是非常重要的，常用平滑、锐化和同态三种滤波器-Frequency-domain filtering: To carry out frequency domain, image enhancement, filtering is very important, often smooth, sharpen, and three kinds of filters with the state of

点运算，几何变换，图像增强，频域滤波，彩色图处理，形态学变换，图像分割，特征提取，模式识别，-Point arithmetic, geometry transform, image enhancement, frequency domain filtering, colour image processing, morphological transformation, image segmentation, feature extraction, pattern recognition,