Python OpenCV | cv2 . arrowedline()方法
原文:https://www . geesforgeks . org/python-opencv-cv2-arrowed line-method/
OpenCV-Python 是一个 Python 绑定库，旨在解决计算机视觉问题。 cv2.arrowedLine()方法用于绘制从起点指向终点的箭头线段。
语法: cv2.arrowedLine(图像、起点、终点、颜色、粗细、线型、移位、tipLength) 参数: 图像:是要画线的图像。 起点:是直线的起始坐标。坐标表示为两个值的元组(即 X 坐标值， Y 坐标值)。 终点:是直线的终点坐标。坐标表示为两个值的元组(即 X 坐标值， Y 坐标值)。 颜色:是待画线条的颜色。对于 BGR ，我们传递一个元组。例如:(255，0，0)代表蓝色。 厚度:是 px 中线条的厚度。 line_type: 表示要绘制的线的类型。 移位:表示点坐标中的小数位数。 提示长度:表示箭头相对于箭头长度的长度。 返回值:返回一个图像。
图像用于以下所有示例:
示例#1:
Python 3
# 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:
例 2:
Python 3
# 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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