Python OpenCV cv2.line()用法及代碼示例

OpenCV-Python是旨在解決計算機視覺問題的Python綁定庫。cv2.line()方法用於在任何圖像上繪製一條線。

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

參數：
image:它是要在其上繪製線條的圖像。
start_point：它是線的起始坐標。坐標表示為兩個值的元組，即(X坐標值，Y坐標值)。
end_point：它是直線的終點坐標。坐標表示為兩個值的元組，即(X坐標值ÿ坐標值)。
color:它是要繪製的線條的顏色。對於BGR，我們通過一個元組。例如：(255，0，0)為藍色。
thickness:它是線的粗細像素。

返回值：它返回一個圖像。

用於以下所有示例的圖像：

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)

輸出：

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)

輸出：

相關用法

注：本文由純淨天空篩選整理自Rajnis09大神的英文原創作品 Python OpenCV | cv2.line() method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。