Patent ID: 8885019

Claim:
An image signal processing device, comprising: a receiving unit for receiving an image signal and setting information for each predetermined unit of the image signal including gamma correction setting information to define a gamma correction amount for the image signal; a gamma correcting unit for performing gamma correction for the image signal based on the gamma correction setting information included in the setting information received by the receiving unit; and an image processing unit for selectively performing a process to display the image for the image signal corrected by the gamma correcting unit based on the image type setting information included in the setting information received by the receiving unit, wherein the gamma correction setting information is determined by computing a brightness average value for each of a plurality of divided areas of the image signal, determining a number of divided areas for which the brightness average value is not larger than a predetermined value, comparing the number of divided areas for which the brightness average value is not larger than a predetermined value to a threshold, and setting the gamma correction setting information according to whether or not the number of divided areas for which the brightness average value is not larger than a predetermined value is less than the threshold.