Patent ID: 8125528

Claim:
An apparatus for digital image stabilization, comprising: an image signal processing module for receiving image signals generated under a first and a second exposure value conditions from an image sensor where the first exposure value condition is greater than the second exposure value condition and outputting digital image signals of a first size and a second size corresponding to the first exposure value condition and the second exposure value condition, respectively, where the first size is smaller than the second size; and an applied image processing module for determining adaptively the second exposure value condition from the first exposure value condition, changing an exposure attribute of the image sensor from the first exposure value condition to the second exposure value condition, receiving the image signals of the first size and the second size, and correcting a property of the image signal of the second size based on the image signal of the first size, wherein the applied image processing module further includes a brightness correcting unit, and wherein the brightness correcting unit computes quantitatively a difference in brightness between the image of the first size and the image of the second size, selects adaptively a brightness correcting intensity, and corrects brightness of the image of the second size by the selected intensity; and the brightness correcting unit scales a size of the image of the second size to a size of the image of the first size to generate a downscaled image, calculates a difference in average values of histograms between the downscaled image and the image of the first size, selects adaptively a brightness correcting intensity, and corrects brightness of the image of the second size by the selected intensity.