Patent ID: 7817210

Claim:
An image processing apparatus comprising: a first memory from which prestored corrected data is read out by referring to low P bit (P is an integer number greater than or equal to 1, and less than or equal to M) in M bits digital image data (M is an integer number less than or equal to 2); a second memory from which prestored data for operation is read out by referring to high R bit (R is an integer number greater than or equal to 1, and less than or equal to M−1) in the digital image data; an arithmetic circuit that calculates corrected data based on the data for operation read out from the second memory; and a selector circuit that outputs the read-out corrected data in case that a value of the digital image data is less than or equal to a predetermined value and that outputs the calculated corrected data in case that the value of the digital image data is greater than the predetermined value.