An image processing apparatus for inputting photographic image data containing dot-matrix pixels and performing a conversion operation for pixels of said input image data, according to predetermined correspondence relationship information, so as to produce processed image data, the apparatus comprising:
- a correspondence relationship holding unit holding:
- correspondence relationship information, including a plurality of correspondence relationships, for conversion of said image data, and
- applicable object information including, for each correspondence relationship, a respective condition comprising information of a region wherein each of the pixels belongs;
- a correspondence relationship judging unit producing a respective judgment for each of the pixels of the input image data, including a given pixel, wherein the judgment indicates whether the region information of the given pixel meets the respective condition of any of the correspondence relationships;
- and
- an image data converting unit performing a conversion operation on the pixels of the input image data to produce the processed image data, wherein, for each given pixel, the conversion operation is performed using only any of the correspondence relationships indicated by said respective judgment of the correspondence relationship judging unit.