Image processing method and apparatus, a recording medium recording an image processing program, and that program

Determining a first bandwidth from an image size of the original image data, thereby to calculate the filter coefficient array for implementing the frequency characteristics corresponding to the band limitation, the original image data to a filtering process by which the first filter generating image data, derives an objective image quality evaluation value of the image data, it calculates a distribution coefficient used for determining an optimum bandwidth based on this, setting the corresponding relationship between the optimum bandwidth and the allocation coefficient by referring to the table that, said determining the optimum bandwidth corresponding to the allocation coefficient, thereby calculating a filter coefficient array for implementing the frequency characteristics corresponding to the band limitation, filtering the original image data by this , an image processing method of generating optimum filtered image data.