Fast license plate locating method
A license plate positioning and fast technology, applied in the field of using top hat transformation and text texture features, can solve the problems of inapplicability to mobile law enforcement, unsatisfactory performance, and high complexity, and achieves reduction of calculation amount, enhanced adaptability, and reduced the effect of interference
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[0027] In order to facilitate the description of the present invention, some concepts are introduced first.
[0028] 1. Gray Morphology
[0029] Morphological operations include two-value morphology and gray-scale morphology, which are used for binary images and gray-scale images respectively. For the license plate images processed in this article, the background is complex and the license plate features are relatively weak. Therefore, according to the traditional processing method, first extract the edge features, and then perform morphological operations and connected domain analysis, which cannot get good results. Therefore, to suppress the background of the natural environment where the license plate is located, the present invention uses gray-scale morphology to process the gray-scale image. In gray-scale morphology, it is assumed that f(x, y) and b(x, y) are defined as discrete functions of two-dimensional discrete spaces F and B, where f(x, y) is a gray-scale image, b(x, y)...
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