A gamma correction apparatus and method capable of preventing noise boost-up. A signal extraction unit extracts high-frequency signals and low-frequency signals from an input image signal, a temporary weight value calculation unit calculates a predetermined temporary weight value based on the luminance...http://www.google.ca/patents/US20050259185?utm_source=gb-gplus-sharePatent US20050259185 - Gamma correction apparatus and method capable of preventing noise boost-up
