The License Plate Edge Detection Algorithm Based on Improved Sobel Operator
The Sobel operator edge detection for license plate recognition information is often influenced by the shooting environment easily,which leads to the difficulty to determine the threshold,and does not have the self-adaptability and high sensitivity to the noise,This paper proposed a selection strategy algorithm based on a secondary search optimization threshold and obtained a complete set of Sobel edge detection algorithm on the license plate.The results showed that the method can better address Sobel algorithm which leaded to false edge points and rough spots for the reason of not self-adaptive threshold,It also obtained a precise edge detection and enhanced real-time detection and robustness.