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import sys
import cv2
import numpy as np
import matplotlib . pyplot as plt
def Sobel ( img_path ) :
img = cv2 . imread ( img_path , 0 ) # 读取图片
# 边缘检测----Prewitt算子
# 边缘检测----Sobel算子
# cv2.Sobel(src, ddepth, dx, dy, dst, ksize, scale, delta,borderType)
# dx和dy表示的是求导的阶数，
x = cv2 . Sobel ( img , cv2 . CV_16S , 1 , 0 )
y = cv2 . Sobel ( img , cv2 . CV_16S , 0 , 1 )
# 转uint8
absX = cv2 . convertScaleAbs ( x )
absY = cv2 . convertScaleAbs ( y )
# 加权
Sobel = cv2 . addWeighted ( absX , 0.5 , absY , 0.5 , 0 )
cv2 . imwrite ( ' ./output/Sobel.jpg ' , Sobel )
'''
输入：一张灰度图
输出：
'''
if __name__ == ' __main__ ' :
Sobel ( sys . argv [ 1 ] )
