import cv2

import numpy as np



img = cv2.imread("book.png",1)

img_org = img.copy()

h,w = img.shape[:2]

p1 = np.float32([[81,30],[378,80],[13,425]])

p2 = np.float32([[0,0],[300,0],[0,400]])

M = cv2.getAffineTransform(p1,p2)

img = cv2.warpAffine(img,M,(w, h))

cv2.imshow("org",img_org)

cv2.imshow("processed",img)

cv2.waitKey(0)