OpenCV-Python是旨在解决计算机视觉问题的Python绑定库。cv2.circle()
方法用于在任何图像上绘制圆。
用法: cv2.circle(image, center_coordinates, radius, color, thickness)
参数:
image:它是要在其上绘制圆的图像。
center_coordinates:它是圆的中心坐标。坐标表示为两个值的元组,即(X坐标值,Y坐标值)。
radius:它是圆的半径。
color:它是要绘制的圆的边界线的颜色。对于BGR,我们通过一个元组。例如:(255,0,0)为蓝色。
thickness:它是圆边界线的粗细像素。厚度-1像素将以指定的颜色填充矩形形状。
返回值:它返回一个图像。
用于以下所有示例的图像:
示例1:
# Python program to explain cv2.circle() 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'
# Center coordinates
center_coordinates = (120, 50)
# Radius of circle
radius = 20
# Blue color in BGR
color = (255, 0, 0)
# Line thickness of 2 px
thickness = 2
# Using cv2.circle() method
# Draw a circle with blue line borders of thickness of 2 px
image = cv2.circle(image, center_coordinates, radius, color, thickness)
# Displaying the image
cv2.imshow(window_name, image)
输出:
示例2:
使用-1 px的厚度用红色填充矩形。
# Python program to explain cv2.circle() 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'
# Center coordinates
center_coordinates = (120, 100)
# Radius of circle
radius = 30
# Red color in BGR
color = (0, 0, 255)
# Line thickness of -1 px
thickness = -1
# Using cv2.circle() method
# Draw a circle of red color of thickness -1 px
image = cv2.circle(image, center_coordinates, radius, color, thickness)
# 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.circle() method。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。