1. A system that rescales a received image to an optimal size, comprising: an optimal size determination component that determines an optimum size for the image such that processing time of the received image is minimized without affecting accuracy, wherein the optimal size determination component determines the optimum size of the image based at least in part on a dominant interline spacing of text and a dominant text x-height; and a rescaling component that resizes the received image to the determined optimum size.