cv2 图片的旋转

import cv2
import numpy as np

iamge_path = 'xuanzhu.jpg'


# 顺时针旋转90度
def RotateClockWise90(img):
    trans_img = cv2.transpose(img)
    new_img = cv2.flip(trans_img, 1)
    return new_img


# 逆时针旋转90度
def RotateAntiClockWise90(img):
    trans_img = cv2.transpose(img)
    new_img = cv2.flip(trans_img, 0)
    return new_img

def image_porcess():
    from PIL import Image
    import matplotlib.pyplot as plt

    img = Image.open(iamge_path)  # 打开图片
    # 逆时针旋转45度 （有黑色背景）
    img01 = img.rotate(45)
    plt.imshow(img01)
    plt.show()
    # 无黑色背景
    img02 = img.transpose(Image.ROTATE_90)
    plt.imshow(img02)
    plt.show()