1. An imaging system for imaging a target in an environment, comprising: a sensor adapted to generate multiple frames of image data, wherein each frame of image data represents an image of the target and the environment; and a computer responsive to the image data, wherein the computer is adapted to: scale at least a portion of the image data to a higher resolution; register the image represented by the image data in a first frame with at least a second image represented by the image data in a second frame; and generate an output image of the target according to the registered images.