读书报告

 1 from PIL import Image
 2 import numpy as np
 3 vec_el = np.pi/2.2
 4 vec_az = np.pi/4.
 5 depth = 10.
 6 im = Image.open('D:/学习/个人/pythonwork/textbook/gif/picframe00.png').convert('L')
 7 a = np.asarray(im).astype('float')
 8 grad = np.gradient(a)
 9 grad_x, grad_y = grad
10 grad_x = grad_x*depth/100.
11 gead_y = grad_y*depth/100.
12 dx = np.cos(vec_el)*np.cos(vec_az)
13 dy = np.cos(vec_el)*np.sin(vec_az)
14 dz = np.sin(vec_el)
15 A = np.sqrt(grad_x**2 + grad_y**2 + 1.)
16 uni_x = grad_x/A
17 uni_y = grad_y/A
18 uni_z = 1./A
19 a2 = 255*(dx*uni_x + dy*uni_y + dz*uni_z)
20 a2 = a2.clip(0,255)
21 im2 =  Image.fromarray(a2.astype('uint8'))
22 im2.save('D:/学习/个人/pythonwork/textbook/gif/HandDraw.jpg')