七夕快到了，用python给女朋友画张素描吧

from PIL import Image import numpy as np a = np.asarray(Image.open(r".\wife.jpg").convert('L')).astype('float') depth = 10. # (0-100) grad = np.gradient(a) #取图像灰度的梯度值 grad_x, grad_y =grad #分别取横纵图像梯度值 grad_x = grad_x*depth/100. grad_y = grad_y*depth/100. A = np.sqrt(grad_x**2 + grad_y**2 + 1.) uni_x = grad_x/A uni_y = grad_y/A uni_z = 1./A vec_el = np.pi/2.2 # 光源的俯视角度，弧度值 vec_az = np.pi/4. # 光源的方位角度，弧度值 dx = np.cos(vec_el)*np.cos(vec_az) #光源对x 轴的影响 dy = np.cos(vec_el)*np.sin(vec_az) #光源对y 轴的影响 dz = np.sin(vec_el) #光源对z 轴的影响 b = 255*(dx*uni_x + dy*uni_y + dz*uni_z) #光源归一化 b = b.clip(0,255) im = Image.fromarray(b.astype('uint8')) #重构图像 im.save(r".\手绘.jpg") print("保存成功,请查看")