Abstract
The most important thing of the detection system is the locating accuray of the pattern edge. With respect to the conventional sub-pixel localizaton algorithm and the irregular edge of the target image, a Gauss curve fitting edge localization algorithm in gradient direction is presented based on the Sobel operator and the usual curve fitting edge localization algorithm; according to a gradient distribution of a target image, a Gauss curve is used to fit defected edges so as to realize sub-pixel location of the edges. Experiments demonstrate that the proposed method is rightness and effectiveness, can obviously improve the accuracy of edge localization and target recognition.
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