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Histogram equalization can be used to enhance the contrast of an image.

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The pixels with D8 distance from(x,y)less than or equal to some valuer form a circle centered at(x,y).

In an image being stored line by line, a series of pixels having the same gray-level value is called a ______ .

The gray scale of a digital image is [0,15], then the bit depth of it is ______ .

Digitizing the coordinate values is called ______ .

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