An image processing apparatus decomposes an image into frequency components of at least two frequency bands, and generates a basic conversion table used to change values of the frequency components. The image processing apparatus sets an expansion/contraction ratio of the basic conversion table on the basis of a pixel value range which is determined on the basis of the image. The basic conversion table is changed based on the set expansion/contraction ratio.

 
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> Image processing apparatus for classifying and storing images and capable of forming reduced images

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