Vehicle license plate detection and recognition method based on combination of MSER and SWT
A license plate detection and recognition method technology, applied in the field of vehicle license plate detection and recognition, can solve the problems of mistaken deletion and missed detection of candidate regions, long algorithm time, etc., to solve the sensitivity of blur and threshold, reduce algorithm time, and reduce algorithm time complexity. degree of effect
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[0060] The present invention will be described in further detail below through specific examples in conjunction with the accompanying drawings.
[0061] figure 1 is a flow chart of the method of the present invention.
[0062] 1. License plate detection
[0063] figure 2 It is a comparison picture before and after MSER segmentation; among them, (a1) is the original image, (a2) is the MSER image, (a3) is the Canny image, (a4) is the Canny segmentation MSER image, (b1) is the original image, (b2) is the MSER graph, (b3) is the Canny graph, and (b4) is the Canny split MSER graph.
[0064] Step 1: MSER detection segmentation and transformation region screening.
[0065] will be like figure 2 The original color images shown in (a1) and (b1) are converted to uint8 type grayscale images (the license plate area has been intentionally blurred to protect privacy). Perform a piecewise linear grayscale transformation as follows
[0066]
[0067] Among them, (x 1 ,y 1 ) and...
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