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Python OpenCV cv2.arrowedLine()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.arrowedLine()方法用於繪製從起點到終點的箭頭線段。

用法: cv2.arrowedLine(image, start_point, end_point, color[, thickness[, line_type[, shift[, tipLength]]]])

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:它是線的結束坐標。坐標表示為兩個值的元組,即(X坐標值,Y坐標值)。 color:它是要繪製的線條的顏色。對於BGR,我們傳遞一個元組。例如:(255,0,0)為藍色。粗細:是線條的粗細(以像素為單位)。 line_type:表示繪圖線的類型。 shift:表示點坐標中的小數位數。 tipLength:表示箭頭尖端相對於箭頭長度的長度。返回值:返回圖像。


用於以下所有示例的圖像:

範例1:

# Python program to explain cv2.arrowedLine() method  
  
# importing cv2  
import cv2  
  
# path  
path = r'C:\Users\Atomix\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 
end_point = (200, 200)  
  
# Green color in BGR  
color = (0, 255, 0)  
  
# Line thickness of 9 px  
thickness = 9
  
# Using cv2.arrowedLine() method  
# Draw a diagonal green arrow line 
# with thickness of 9 px  
image = cv2.arrowedLine(image, start_point, end_point, 
                                     color, thickness)  
  
# Displaying the image  
cv2.imshow(window_name, image) 

輸出:

範例2:

# Python program to explain cv2.arrowedLine() method  
  
# importing cv2  
import cv2  
  
# path  
path = r'C:\Users\Atomix\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 (225, 0)  
# represents the top right corner of image  
start_point = (225, 0)  
  
# End coordinate 
end_point = (0, 90)  
  
# Red color in BGR  
color = (0, 0, 255)  
  
# Line thickness of 9 px  
thickness = 9
  
# Using cv2.arrowedLine() method  
# Draw a red arrow line 
# with thickness of 9 px and tipLength = 0.5 
image = cv2.arrowedLine(image, start_point, end_point,  
                    color, thickness, tipLength = 0.5)  
  
# Displaying the image  
cv2.imshow(window_name, image) 

輸出:



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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.arrowedLine() 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。