Python OpenCV cv2.rotate()用法及代码示例 |
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Python OpenCV cv2.rotate()用法及代码示例
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OpenCV-Python是旨在解决计算机视觉问题的Python绑定库。cv2.rotate()方法用于将2D数组旋转90度的倍数。函数cv::rotate以三种不同的方式旋转数组。 用法： cv2.cv.rotate( src, rotateCode[, dst] )参数： src:它是要更改其色彩空间的图像。 rotateCode:它是一个枚举，用于指定如何旋转数组。 dst:它是与src图像大小和深度相同的输出图像。它是一个可选参数。 返回值：它返回一个图像。 用于以下所有示例的图像：
范例1：顺时针旋转90度 # Python program to explain cv2.rotate() method # importing cv2 import cv2 # path path = r'C:\Users\user\Desktop\geeks14.png' # Reading an image in default mode src = cv2.imread(path) # Window name in which image is displayed window_name = 'Image' # Using cv2.rotate() method # Using cv2.ROTATE_90_CLOCKWISE rotate # by 90 degrees clockwise image = cv2.rotate(src, cv2.cv2.ROTATE_90_CLOCKWISE) # Displaying the image cv2.imshow(window_name, image) cv2.waitKey(0)输出：
范例2：顺时针旋转180度 # Python program to explain cv2.rotate() method # importing cv2 import cv2 # path path = r'C:\Users\user\Desktop\geeks14.png' # Reading an image in default mode src = cv2.imread(path) # Window name in which image is displayed window_name = 'Image' # Using cv2.rotate() method # Using cv2.ROTATE_180 rotate by # 180 degrees clockwise image = cv2.rotate(src, cv2.ROTATE_180) # Displaying the image cv2.imshow(window_name, image) cv2.waitKey(0)输出：
范例3：顺时针旋转270度 # Python program to explain cv2.rotate() method # importing cv2 import cv2 # path path = r'C:\Users\user\Desktop\geeks14.png' # Reading an image in default mode src = cv2.imread(path) # Window name in which image is displayed window_name = 'Image' # Using cv2.rotate() method # Using cv2.ROTATE_90_COUNTERCLOCKWISE # rotate by 270 degrees clockwise image = cv2.rotate(src, cv2.ROTATE_90_COUNTERCLOCKWISE) # Displaying the image cv2.imshow(window_name, image) cv2.waitKey(0)输出：
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