METHOD AND DEVICE FOR LIGHTNESS ADJUSTMENT BASED UPON LIGHTNESS PERCEPTION CHARACTERISTIC

摘要

PURPOSE: To easily and optionally adjust lightness. CONSTITUTION: An image is inputted 201, an object area is specified 202, and the illuminance values of the object area and a background area is calculated 203. Lightness perceived in the object area is calculated from both the illuminance values 204. The degree of lightness to be varied in the object area is inputted 205, and the illuminance in the object area or background area is calculated so that the perceived lightness in the object area matches with the inputted degree of variation of the lightness 206. On the basis of the calculation result of the illuminance, an image which is varied in the illuminance in the object area or background area is generated and outputted 207 and 208.