1. A method for correcting a distortion effect in a distorted image, the method comprising: selecting a subset region of a destination image; identifying, based on a predetermined offset, a plurality of pixels of the distorted image corresponding to the region in the destination image; reading into local memory from system memory pixels from the corresponding region of the distorted image; reversing the distortion by computing, using stored values only in the local memory, revised values of each of the pixels in the region of the destination image; and writing the computed values into system memory.