Image Boundary Detection Using Array Systems

Two methods are described for detecting boundary contours of uniformly shaded images utilizing sensor array systems. Image perturbation was used to improve the detecting accuracy. It is shown that the contour detecting accuracy is closely related to the amplitude of the perturbation signal in the linear array system. A negligible detection error was obtained for all examples considered when the amplitude of the perturbation signal was set equal to one-half the center-to-center array element spacing. The least square filter was of limited benefit in the case of the square array system.