Gamma correction apparatus for image-capturing device e.g. camcorder, has weight value calculation unit calculating value based on luminance level of image signal, and decision unit determining signals involved in gamma correction

摘要

The apparatus has an extraction unit to extract high and low frequency signals from an image signal. A temporary weight value calculation unit (220) calculates a predetermined value based on luminance level of the image signal. A decision unit (240) determines high-frequency signals involved in gamma correction based on calculated value. A gamma correction unit applies the correction to the signals involved in the correction. Independent claims are also included for the following: (A) a gamma correction method (B) a computer readable storage medium containing instructions for a gamma correction method.