前景分离和消除
如果只有一种主色使用，图像的前景和背景可被精细的分离.
找出要删除的栅栏主色.
| In[1]:= |  X |
| In[2]:= |  X |
| Out[2]= |  |
将绿色栅栏从其背后场景分离.
| In[3]:= |  X |
| Out[3]= |  |
用图像修复移除栅栏.
| In[4]:= |  X |
| Out[4]= |  |
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