Canny edge detection steps: An original image and the Gaussian filter to do the convolution. Edge intensity of 2 using the first derivative of the mask obtained for each pixel on the image in four directions Find the maximum value in the four directions as the edge intensity of the pixel. (4) in accordance with step 3 of the direction of the gradient is divided into four regions 5 non-maximal Delete: to find out the maximum value along the direction of the gradient, and reserves the right, the rest are set to zero. 6 set two thresholds a low T and high T-high T to select the best edge pixels, from the neighboring Points (The neighbor) to find the gradient strength is greater than the pixels of a low T, you can get to the edge contour. UML at you can select the image path

CANNY\CannyEdgeDetector.java
CANNY

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