Patent ID: 8194028

Claim:
A system for an electronic device for adjusting images, comprising: a display for displaying an image on the device; an image adjustment module to convert bitmap data for the image from RGB data to YUV data; convert YUV data of a macroblock of the image being no greater than 99% of the size of the image to frequency data using an inverse discrete cosine transform; adjust a discrete cosine component of a pixel in the macroblock to adjust the brightness of all pixels in the macroblock based on a distribution of intensities of pixels in the macroblock; further adjust the discrete cosine component of the pixel in the macroblock by a percentage of the distribution based on a clip level for the distribution or a standard deviation value for the distribution; convert the frequency data to adjusted YUV data; and convert the adjusted YUV data to adjusted RBG data for the image having new pixel intensity values; and a backlight system to provide a backlight for the display, the backlight system responsive to the image adjustment module based on the new pixel intensity values, the backlight being decreased by a factor relating to a gamma factor associated with the image.