Abstract
In order to get the precise overprint error,a new detection algorithm based on mathematical morphology was proposed.Firstly,the method of edge detection based on mathematical morphology was adopted to extract the edges of the mark.Then the sub-pixel position of the target center was obtained using Least-Mean Square(LMS) circle fitting algorithm,and lastly,the result was worked out with the formula using the data obtained above.The experimental and factual testing results show that the proposed algorithm can filter the noise successfully and can meet the demands of high-quality and real-time of overprint error detection.
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