opencv文件的处理官方参考Image file reading and writing：https://docs.opencv.org/4.x/d4/da8/group__imgcodecs.html#ga288b8b3da0892bd651fce07b3bbd3a56
参考：https://zhuanlan.zhihu.com/p/431530466
# -*- coding: utf-8 -*-
import cv2
import os
import numpy as np
import time
images = 't1.jpg'
images_out = 'out-' + 't1.jpg'
root_path = os.path.abspath(os.path.dirname(__file__))
im_path = os.path.join(root_path, images)
img = cv2.imread(im_path)
def rotate_bound(image, angle):
(h, w) = image.shape[:2]
(cX, cY) = (w / 2, h / 2)
M = cv2.getRotationMatrix2D((cX, cY), -angle, 1.0)
cos = np.abs(M[0, 0])
sin = np.abs(M[0, 1])
nW = int((h * sin) + (w * cos))
nH = int((h * cos) + (w * sin))
M[0, 2] += (nW / 2) - cX
M[1, 2] += (nH / 2) - cY
return cv2.warpAffine(image, M, (nW, nH))
res = rotate_bound(img, 0)
print(img == res)
cv2.imwrite(images_out, res)
print(res)