Abstract
This thesis is to approach license-plate location using Sobel mask operator for license-plate location. This thesis consists of three main parts. The first part is to gray and HSI transform and cut image to reduce image scan time. The second part is to use Sobel edge function and use scan line scanning image to find license-plate. The third part is to locate and extract the license-plate. The last step is license plate and through 2D Haar Discrete Wavelet Transform two times, after transform only selected LL low-frequency parts and will the data arrange into a row when license plate the feature values. The experimental result can be high location rate. Hence, Sobel edge image is a good each of methods.
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