| 摘要 |
PROBLEM TO BE SOLVED: To perform frequency emphasis processing, etc., all the time in the same way regardless of the resolution of an image to be processed by performing relative displacement of a reference conversion function so that the frequency band of each band limitation image signal corresponding to the reference conversion function can be the closest to an image for processing and setting the reference conversion function as a conversion function of the image for processing. SOLUTION: A parameter setting means 4 sets a reference conversion function used by a frequency emphasis processing means 3 on the basis of the magnification information M of a magnification means 5. An out-of-focus image signal preparing means 2 prepares an out-of-focus image signal from an original image signal Sorg'. The means 3 performs relative displacement of a reference conversion function so that the frequency band of each band limitation image signal corresponding to the reference conversion function can be the closest to the frequency band of each band limitation image signal about an image for processing, sets the shifted reference conversion function as the conversion function of the image for processing, performs frequency emphasis processing and obtains an intermediate processed image signal Sproc'. |
