1. One or more computer-readable media having computer-useable instructions embodied thereon to perform a method for transforming the visual appearance of a digital image with a graphics processing unit (GPU), said method comprising: receiving a request to transform the appearance of at least a portion of said digital image; communicating to said GPU a first set of instructions for performing a first one-dimensional transformation with respect to said digital image, wherein the results from performing said first one-dimensional transformation are stored as a first output image; communicating to said GPU a second set of instructions for performing a second one-dimensional transformation with respect to said first out image, wherein the results from performing said second one-dimensional transformation are stored as a second output image for presentation.