240723 边缘检测

原图

索贝尔

拉普拉斯和canny

# -*- coding: utf-8 -*-
 import sysimport cv2
 import numpy as np# 加载图片
 # 转换灰度图
 input_file = sys.argv[1]
 img = cv2.imread(input_file, cv2.IMREAD_GRAYSCALE)
 h, w = img.shape# 索贝尔边缘检测-水平
 sobel_horizontal = cv2.Sobel(img, cv2.CV_64F, 1, 0, ksize=5)
 # 索贝尔边缘检测-垂直
 sobel_vertical = cv2.Sobel(img, cv2.CV_64F, 0, 1, ksize=5)
 # 拉普拉斯边缘检测
 laplacian = cv2.Laplacian(img, cv2.CV_64F)
 # canny边缘检测
 canny = cv2.Canny(img, 50, 240)cv2.imshow('Original', img)
 cv2.imshow('Sobel horizontal', sobel_horizontal)
 cv2.imshow('Sobel vertical', sobel_vertical)
 cv2.imshow('Laplacian', laplacian)
 cv2.imshow('Canny', canny)cv2.waitKey()