Description: Image Smoothing of digital image processing is an important element. We are involved in image between the adjacent pixel gray mostly with a very high correlation, meaning that the majority of image pixel gray value is not very different. Because the gray-scale correlation exists, the general image of energy mainly concentrated in the low-frequency region, only the details of the image part of the energy only in the high-frequency region. However, because in the digitization and transmission of noise and often leave the outline of the emergence of this part of information is also concentrated in the high-frequency region.
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