# 手绘图像

**Repository Path**: paidaking/hand_drawn_image

## Basic Information

- **Project Name**: 手绘图像
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2019-01-28
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 手绘图像


```
from PIL import Image
import numpy as np

a = np.array(Image.open("D:/lianxi/q.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("D:/lianxi/w.jpg")
```

原图
![输入图片说明](https://images.gitee.com/uploads/images/2019/0128/160155_dc92bf43_2218058.jpeg "girl-1.jpg")

效果图
![输入图片说明](https://images.gitee.com/uploads/images/2019/0128/160209_3180337b_2218058.jpeg "girl-2.jpg")