python图片旋转

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import cv2
import matplotlib.pyplot as plt
import numpy as np

def show(image):
    plt.imshow(image)
    plt.axis('off')
    plt.show()

def imread(image):
    image = cv2.imread(image)
    image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
    return image

image = imread('image.jpg')
show(image)

(h, w) = image.shape[0:2]
(cX, cY) = (w/2, h/2)

M = cv2.getRotationMatrix2D((cX, cY), 45, 1.0)
image = cv2.warpAffine(image, M, (w, h))
show(image)