Automatic Skew Detection and Localisation of Vehicle License Plate Using Hough Transform

Automatic Skew Detection and Localization of Vehicle License Plate Using Hough Transform are used to identify a vehicle by its number plate. The proposed algorithm consists of three major parts: Extraction of plate region, segmentation of characters and recognition of plate characters. The proposed license plate localization algorithm is based on a combination of several algorithms that include Thresholding, Edge Detection and Hough rectangular transforms. The process flow is, initially the Thresholds are performed on a plain image. Then edge detection is applied to the obtained image and then location is found using top hat transform and then the skew is detected by using the Hough Rectangular Transform and correct it and finally get the localized number plate from the digital image as a deskewd image. After that Connected component analysis is used to segment the characters individually and finally statistical based template matching is used for recognition of plate characters.