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Python OpenCV cv2.erode()用法及代码示例

OpenCV-Python是旨在解决计算机视觉问题的Python绑定库。cv2.erode()方法用于对图像进行腐蚀。侵蚀的基本思想就像仅是土壤侵蚀一样,它侵蚀了前景物体的边界(始终尝试使前景保持白色)。通常在二进制图像上执行。它需要两个输入,一个是我们的原始图像,第二个是决定操作性质的结构元素或内核。仅当内核下的所有像素均为1时,原始图像中的像素(1或0)才被视为1,否则它将被侵蚀(设为零)。

用法: cv2.erode(src, kernel[, dst[, anchor[, iterations[, borderType[, borderValue]]]]])
参数:
src: It is the image which is to be eroded .
kernel: A structuring element used for erosion. If element = Mat(), a 3 x 3 rectangular structuring element is used. Kernel can be created using getStructuringElement.
dst: It is the output image of the same size and type as src.
anchor: It is a variable of type integer representing anchor point and it’s default value Point is (-1, -1) which means that the anchor is at the kernel center.
borderType: It depicts what kind of border to be added. It is defined by flags like cv2.BORDER_CONSTANT, cv2.BORDER_REFLECT, etc.
iterations: It is number of times erosion is applied.
borderValue: It is border value in case of a constant border.
返回值: It returns an image.

用于以下所有示例的图像:

范例1:

# Python program to explain cv2.erode() method  
  
# importing cv2  
import cv2 
  
# importing numpy  
import numpy as np 
  
# path  
path = r'C:\Users\Rajnish\Desktop\geeksforgeeks\geeks.png'
  
# Reading an image in default mode  
image = cv2.imread(path)  
  
# Window name in which image is displayed  
window_name = 'Image'
  
# Creating kernel 
kernel = np.ones((5, 5), np.uint8) 
  
# Using cv2.erode() method  
image = cv2.erode(image, kernel)  
  
# Displaying the image  
cv2.imshow(window_name, image) 

输出:

范例2:

# Python program to explain cv2.erode() method  
  
# importing cv2  
import cv2 
  
# importing numpy  
import numpy as np 
  
# path  
path = r'C:\Users\Rajnish\Desktop\geeksforgeeks\geeks.png'
  
# Reading an image in default mode  
image = cv2.imread(path)  
  
# Window name in which image is displayed  
window_name = 'Image'
  
# Creating kernel 
kernel = np.ones((6, 6), np.uint8) 
  
# Using cv2.erode() method  
image = cv2.erode(image, kernel, cv2.BORDER_REFLECT)  
  
# Displaying the image  
cv2.imshow(window_name, image) 

输出:



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注:本文由纯净天空筛选整理自Rajnis09大神的英文原创作品 Python OpenCV | cv2.erode() method。非经特殊声明,原始代码版权归原作者所有,本译文的传播和使用请遵循“署名-相同方式共享 4.0 国际 (CC BY-SA 4.0)”协议。