Find edge for an input gray image

Input:an gray scale image

Output:

1.Image_OE:the detected edge

reference:P. Perona and J. Malik. Detecting and localizing edges composed

of steps, peaks and roofs. ICCV, 1990-　Find edge for an input gray image　Input: an gray scale image　Output:　1.Image_OE: the detected edge　reference: P. Perona and J. Malik. Detecting and localizing edges composed　of steps, peaks and roofs. ICCV, 1990