OPENCV sobel/scharr/laplacian算子检测不同方向边缘信息;

sobel算子检测不同方向边缘信息

import cv2
import numpy as np
img=cv2.imread('C:/Users/59925/Desktop/pytest/pics/minions-s.jpg')
#获取竖向轮廓
sobelx=cv2.Sobel(img,cv2.CV_64F,1,0,ksize=3)
sobelx=cv2.convertScaleAbs(sobelx)
#获取横向轮廓
sobely=cv2.Sobel(img,cv2.CV_64F,0,1,ksize=3)
sobely=cv2.convertScaleAbs(sobely)
#两相加
sobelxy=cv2.addWeighted(sobelx,0.5,sobely,0.5,0)
#cv2同时计算两个方向轮廓效果不好
mix=cv2.Sobel(img,cv2.CV_64F,1,1,ksize=3)
mix=cv2.convertScaleAbs(mix)
res=np.hstack((sobelx,sobely,sobelxy,mix))
cv2.imshow('res',res)
cv2.waitKey(0)
cv2.destroyAllWindows()
#scharr算子
scharrx=cv2.Scharr(img,cv2.CV_64F,1,0)
scharrx=cv2.convertScaleAbs(scharrx)
scharry=cv2.Scharr(img,cv2.CV_64F,0,1)
scharry=cv2.convertScaleAbs(scharry)
scharrxy=cv2.addWeighted(scharrx,0.5,scharry,0.5,0)
#laplacian 算子
laplacian=cv2.Laplacian(img,cv2.CV_64F)
laplacian=cv2.convertScaleAbs(laplacian)
res1=np.hstack((scharrx,scharry,scharrxy,laplacian))
cv2.imshow('res1',res1)
cv2.waitKey(0)
cv2.destroyAllWindows()

　　

　sobelx,sobely,sobelxy,mix

 

 

scharrx,scharry,scharrxy,laplacian