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Python Opencv旋轉圖片90度

import numpy as np
import cv2

img=cv2.imread("/home/lisa/dataset/HandDataSet_720_1280/lisa/image/0.jpg",1)
cv2.imshow("temp",img)
cv2.waitKey(0)

img90=np.rot90(img)

cv2.imshow("rotate",img90)
cv2.waitKey(0)