1. An improved image sensing wheel alignment system for calculating vehicle wheel alignments comprising: a detector array for receiving an input image containing vehicle wheel alignment information, said detector array having image detecting elements; an image sensor controller for controlling the detector array to receive the input image during an acquisition period, said image sensor controller examining signals from the image detecting elements individually during the acquisition period, and further including circuitry for reading out an output image from the image detecting elements, said output image containing wheel alignment information for use in calculating vehicle wheel alignments, said output image including outputs from image detecting elements obtained at two different exposure levels.