import cv2
import numpy as np

def Affine(img):
    # 图像输入
    src = img
    # 图像放缩
    src = cv2.resize(src, (256, 256))
    # 获取图像shape
    rows, cols = src.shape[: 2]

    ########Begin########
    # 设置图像仿射变化矩阵
    post1 = np.float32([[50, 50], [200, 50], [50, 200]])
    post2 = np.float32([[10, 100], [200, 50], [100, 250]])
    M = cv2.getAffineTransform(post1, post2)
    # 图像仿射变换，及保存
    result = cv2.warpAffine(src, M, (rows, cols))
    return result