update README

README.md

@@ -3,10 +3,20 @@
 ## Model
 |   model   |  onnx  |   mnn  |
 |:---------:|:------:|:------:|
-| sam_vit_b | `TODO` | `TODO` |
+| sam_vit_b | [![Download][download-onnx]][release-onnx] | [![Download][download-mnn]][release-mnn] |
+
+[download-onnx]: https://img.shields.io/github/downloads/wangzhaode/mnn-segment-anything/v0.2/total
+[download-mnn]: https://img.shields.io/github/downloads/wangzhaode/mnn-segment-anything/v0.1/total
+[release-onnx]: https://github.com/wangzhaode/mnn-segment-anything/releases/tag/v0.2
+[release-mnn]: https://github.com/wangzhaode/mnn-segment-anything/releases/tag/v0.1
+
 
 - [github](https://github.com/facebookresearch/segment-anything)
 
 ## Demo
 - [Python](./python/)
-- [C++](./cpp)
+- [C++](./cpp)
+
+### 示例输出
+![input](resource/truck.jpg)
+![output](resource/res.jpg)