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Python OpenCV cv2.arrowedLine()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.arrowedLine()方法用于绘制从起点到终点的箭头线段。

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

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:它是线的结束坐标。坐标表示为两个值的元组,即(X坐标值,Y坐标值)。 color:它是要绘制的线条的颜色。对于BGR,我们传递一个元组。例如:(255,0,0)为蓝色。粗细:是线条的粗细(以像素为单位)。 line_type:表示绘图线的类型。 shift:表示点坐标中的小数位数。 tipLength:表示箭头尖端相对于箭头长度的长度。返回值:返回图像。


用于以下所有示例的图像:

范例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) 

输出:

范例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) 

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.arrowedLine() 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。