Patent ID: 7587089

Claim:
An image processing method applied in an image processing apparatus, comprising the steps of: analyzing neighboring pixels of a to-be-processed pixel to calculate local characteristic values, wherein the local characteristic values comprise average illumination, illumination variability and histogram of illumination of a local image; generating a first weighting and a second weighting according to the characteristic values, wherein the first weighting of a high gain dynamic response distribution curve is inversely proportional to the average illumination and directly proportional to the illumination variability, and the second weighting of a low gain dynamic response distribution curve is relative to the histogram of illumination and illumination of the to-be-processed pixel; generating a first modulated illumination of the high gain dynamic response distribution curve by calculating a maximum gain of the high gain dynamic response distribution curve according to the illumination of the to-be-processed pixel; generating a second modulated illumination of the low gain dynamic response distribution curve by calculating a minimum gain of the low gain dynamic response distribution curve according to the illumination of the to-be-processed pixel; and multiplying the first weighting and the first modulated illumination together to generate a first weighting illumination; multiplying the second weighting and the second modulated illumination together to generate a second weighting illumination; and synthesizing the first weighting illumination and the second weighting illumination to output an image value.