1. A method of sharpening a full-color image of a scene comprising: (a) capturing an image of the scene using a two-dimensional sensor array having both color and panchromatic pixels; (b) forming the full-color image in response to the captured color pixels and forming a reference panchromatic image in response to the captured panchromatic pixels; (c) forming a high-frequency panchromatic image from the reference panchromatic image; and (d) providing a sharpened full-color image in response to the high-frequency panchromatic image and the full-color image.