add model architecture

Author: likyoo

README.md

@@ -15,11 +15,9 @@
 This project is inspired by **[segmentation_models.pytorch](https://github.com/qubvel/segmentation_models.pytorch)** and built based on it. 😄
 
 
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 <img src="resources/model architecture.png" alt="model architecture" style="zoom:80%;" />
 
 
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 ### 🌱 How to use <a name="use"></a>
 
 Please refer to local_test.py temporarily.