TV image adjusting method and apparatus thereof

A TV image adjusting apparatus that adjusts a luminance value of a target pixel of an image frame, comprising:

• a buffer that stores the luminance value of the target pixel and luminance values of a plurality of neighboring pixels associated with the target pixel;
• a storage unit that stores a look-up table comprising mapping information between weight indexes and weights related to the luminance value of the target pixel and the luminance values of the neighboring pixels;
• an averager, coupled to the buffer, that generates a luminance average according to the luminance value of the target pixel and the luminance values of the neighboring pixels;
• a weight generating unit, coupled to the buffer, the storage unit and the averager, that performs a variance calculation on the luminance values of the neighboring pixels and the luminance average to generate a weight index, and performs a look-up table search according to the weight index to obtain a weight value corresponding to the target pixel;
• and
• a luminance adjusting unit, coupled to the buffer, the averager and the weight generating unit, that generates an updated luminance value of the target pixel by weighting the luminance value of the target pixel and the luminance average according to the weight value.