手绘 代码

#coding=utf-8
import numpy as np
from PIL import Image

a = np.asarray(Image.open('F:\\3.gif').convert('L')).astype('float')
depth = 10.     # 预设深度值为10 取值范围（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. # 根据深度调整x和y方向的梯度值；
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'))     # 重枸图像
im.save('F:\\5.jpg')