IMAGE PROCESSING DEVICE FOR CORRECTING AN ERROR IN A MULTILEVEL IMAGE SIGNAL AND FOR PRINTING THE IMAGE

An image processor comprises a correction unit for correcting an input image signal in accordance with a correction signal, a multilevel coding unit for converting the corrected image signal into a multilevel signal having a level corresponding to one of the gradation levels of a printer, a converter for converting the multilevel signal into a reflectance signal corresponding to the printing characteristics of the printer, and an error calculating unit for calculating a difference between the corrected image signal and the reflectance signal, the difference being applied to the correction unit as the correction signal. Although no gamma corrections are made on pixel signals, an image can be printed with its gradations reproduced fully regardless of the use of a simple conversion table.