Patent ID: 8334925

Claim:
A method for backlight compensation of an image, comprising: generating an image histogram of an image to be processed; judging whether the image to be processed requires backlight compensation according to the image histogram; if the image to be processed requires the backlight compensation, determining a first luminance boundary value A used for performing the backlight compensation and a second luminance boundary value C used for performing positive or negative backlight compensation; and performing backlight compensation for the image to be processed according to the first luminance boundary value A and the second luminance boundary value C; wherein judging whether the image to be processed requires the backlight compensation includes: obtaining a luminance level of L 1 a pixel point corresponding to a crest value of a highest peak with a maximum crest luminance and a luminance level L 2 of a pixel point corresponding to a crest value of a second highest peak whose crest luminance level is lower than an average luminance of the image histogram, and determining that the image to be processed requires the backlight compensation if L 1 −L 2 >K, wherein K is a fixed luminance difference and K>0.