IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

摘要

For preferably reducing show-through in an image obtained by reading an original, an image processing apparatus, stores an index value for each of a plurality of mutually differing degrees of variation; obtains a degree of variation of signal values included in a region of interest of a predetermined size including a pixel of interest included in image data; obtains a value indicating a brightness of the region of interest; determines an amount of correction of a value of the pixel of interest using the obtained value and an index value corresponding to the obtained degree of variation; and corrects the value of the pixel of interest using the determined amount of correction.

主权项

1. An image processing apparatus, comprising:
a storage unit configured to store an index value for each of a plurality of mutually differing degrees of variation; a first obtainment unit configured to obtain a degree of variation of signal values included in a region of interest of a predetermined size including a pixel of interest included in image data; a second obtainment unit configured to obtain a value indicating a brightness of the region of interest; a determination unit configured to determine an amount of correction of a value of the pixel of interest using the value obtained by the second obtainment unit and an index value corresponding to the degree of variation obtained by the first obtainment unit that is stored by the storage unit; and a correction unit configured to correct the value of the pixel of interest using the amount of correction determined by the determination unit.