Python OpenCV cv2.line()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.line()方法用于在任何图像上绘制一条线。

用法： cv2.line(image, start_point, end_point, color, thickness)

参数：
image:它是要在其上绘制线条的图像。
start_point：它是线的起始坐标。坐标表示为两个值的元组，即(X坐标值，Y坐标值)。
end_point：它是直线的终点坐标。坐标表示为两个值的元组，即(X坐标值ÿ坐标值)。
color:它是要绘制的线条的颜色。对于BGR，我们通过一个元组。例如：(255，0，0)为蓝色。
thickness:它是线的粗细像素。

返回值：它返回一个图像。

用于以下所有示例的图像：

示例1:

# Python program to explain cv2.line() method  
   
# importing cv2  
import cv2  
   
# 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'
  
# Start coordinate, here (0, 0) 
# represents the top left corner of image 
start_point = (0, 0) 
  
# End coordinate, here (250, 250) 
# represents the bottom right corner of image 
end_point = (250, 250) 
  
# Green color in BGR 
color = (0, 255, 0) 
  
# Line thickness of 9 px 
thickness = 9
  
# Using cv2.line() method 
# Draw a diagonal green line with thickness of 9 px 
image = cv2.line(image, start_point, end_point, color, thickness) 
  
# Displaying the image  
cv2.imshow(window_name, image)

输出：

示例2:

# Python program to explain cv2.line() method  
   
# importing cv2  
import cv2  
   
# path  
path = r'C:\Users\Rajnish\Desktop\geeksforgeeks\geeks.png'
   
# Reading an image in grayscale mode 
image = cv2.imread(path, 0) 
   
# Window name in which image is displayed 
window_name = 'Image'
  
# Start coordinate, here (225, 0) 
# represents the top right corner of image 
start_point = (225, 0) 
  
# End coordinate, here (0, 225) 
# represents the bottom left corner of image 
end_point = (0, 225) 
  
# Black color in BGR 
color = (0, 0, 0) 
  
# Line thickness of 5 px 
thickness = 5
  
# Using cv2.line() method 
# Draw a diagonal black line with thickness of 5 px 
image = cv2.line(image, start_point, end_point, color, thickness) 
  
# Displaying the image  
cv2.imshow(window_name, image)

输出：

相关用法

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.line() method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。