Patent ID: 7443453

Claim:
An apparatus for dynamically adjusting a saturation of an image signal consisting of a plurality of pixels, said apparatus comprising: a first transformation module, for receiving the image signal, and transforming the pixels of the image signal into a plurality of intermediate signals, wherein each of the intermediate signals has a respective saturation value; an operation module, electrically connected to the first transformation module, for receiving the intermediate signals, calculating a histogram relative to the saturation values of the intermediate signals, and then generating an operational signal in accordance with the distribution of saturation values of the intermediate signals in the histogram; a gain module, electrically connected to the operation module, for receiving the operational signal, and generating, according to the operational signal, a gain signal; an adjustment module, electrically connected to the gain module and the first transformation module respectively, for receiving the gain signal and the intermediate signals, and adjusting, according to the gain signal, the saturation value of each of the intermediate signals; and a second transformation module, electrically connected to the adjustment module, for receiving the adjusted intermediate signals, and transforming the adjusted intermediate signals back into the pixels of the image signal; whereby the saturation of the image signal is adjusted.