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License plate location plays an important role in vehicle license plate recognition. This paper presents a real time method of license plate location. First, run length is used for finding the candidate horizontal regions of license plate. Second, we locate the license plates exactly using tamura texture features. In the experiment on locating license plates, 1400 images were taken in various backgrounds...
Extraction of the license plate region is challenging first step in the license plate recognition system. The paper proposed approach is not only simple but also more effective than some of the existing method earlier. A new dynamic RGB threshold formula by limiting the hue change range is educed. The license image is made grids. Then we can plot and mark them by the formula and operate them with...
Based on the sharing features of a variety of license plates (LP), the vertical edge was first detected by sobel color edge detector. Then, some approaches were adopted to adaptively remove the invalid edge regarding the characteristics of edge grayscale jump and edge density, so that the regions having features of LP were preserved. Next, by edge density template matching and the mean and variance...
License plate detection plays an important role in license plate recognition (LPR) system. If license plate can be detected exactly, the character segmentation and recognition can be implemented more precisely and efficiently. In our observation, the illumination affects the result of detecting the license plate. The aim of this paper is to extract more than one license plate from an image and to...
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