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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