Patent ID: 8005318

Claim:
A weight-adjusted module for adjusting a weighting coefficient in an image scaling process, the weight-adjusted module comprising: an operating unit for obtaining a difference between a first pixel value of an image and a second pixel value of the image, taking an absolute value of the difference to obtain an absolute difference, and then comparing the absolute difference with a plurality of threshold values to output a weight-adjusted value corresponding to a zone, wherein the absolute difference falls in the zone, and the zone is defined by the threshold values; and an adjusting unit for setting a weighting coefficient calibrating value according to the weight-adjusted value, adding a first pixel weighted value to the weighting coefficient calibrating value to obtain a first adjusted pixel weighted value, and subtracting the weighting coefficient calibrating value from a second pixel weighted value to obtain a second adjusted pixel weighted value, wherein the adjusting unit compares the first pixel weighted value with the second pixel weighted value to select a smaller one of the first pixel weighted value and the second pixel weighted value to serve as a reference base value, and selects the weighting coefficient calibrating value to be the reference base value, a half of the reference base value or zero according to the weight-adjusted value.