1. An image processing system comprising: a key extractor that is configured to create a key-only image from a keyed image, the keyed image having one or more key regions that are configured to identify regions in the keyed image that are intended to be replaced by other image information, and the key-only image having identified regions corresponding to the key regions of the keyed image; a scaler that is configured to independently scale the keyed image and the key-only image to produce a scaled keyed image and a scaled key-only image; and a merger that is configured to merge the scaled keyed image and the scaled key-only image.