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rotate picture in opencv2 python

# 90degree
image = cv2.rotate(src, cv2.cv2.ROTATE_90_CLOCKWISE)
# 180 degrees
image = cv2.rotate(src, cv2.ROTATE_180)
# 270 degrees
image = cv2.rotate(src, cv2.ROTATE_90_COUNTERCLOCKWISE)
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cv2 rotate image

M = cv2.getRotationMatrix2D(center, angle, scale)
rotated = cv2.warpAffine(img, M, (w, h))
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