Canny edge detector algorithm matlab codes

This part gives the algorithm of Canny edge detector. The outputs are six subfigures shown in the same figure:

• 　　Subfigure 1: The initial "lena"

• 　　Subfigure 2: Edge detection along X-axis direction

• 　　Subfigure 3: Edge detection along Y-axis direction

• 　　Subfigure 4: The Norm of the image gradient

• 　　Subfigure 5: The Norm of the gradient after thresholding

• 　　Subfigure 6: The edges detected by thinning