旋转图像而不裁剪OpenCV [英] Rotate image without cropping OpenCV

问题描述

问题是如何使用OpenCV旋转图像并保持原始尺寸.当前正在使用此功能:

The question is how to rotate image using OpenCV and keep original dimensions. Currently using this function:

def rotateImage(image, angle):
   (h, w) = image.shape[:2]
   center = (w / 2, h / 2)
   M = cv2.getRotationMatrix2D(center,angle,1.0)
   rotated_image = cv2.warpAffine(image, M, (w,h))
   return rotated_image

另外，warpAffine(Bicubic?)中使用了哪种算法

Additionally what kind of algorithm utilised in warpAffine (Bicubic?)

推荐答案

创建尺寸为初始图像对角线的新正方形图像.
将初始图像绘制到新图像的中心.
旋转新图片

Create new square image with dimension = diagonal of your initial image.
Draw initial image into the center of new image.
Rotate new image

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