Update README.md

Author: wang-xinyu

retinaface/README.md

@@ -2,6 +2,38 @@
 
 ## Notice
 
-- Only tested on TensorRT4.1.3
+- Only tested on TensorRT4
+- The pytorch implementation is [biubug6/Pytorch_Retinaface](https://github.com/biubug6/Pytorch_Retinaface), I forked it into 
+[wang-xinyu/Pytorch_Retinaface](https://github.com/biubug6/Pytorch_Retinaface) and add genwts.py
 
+## Run
 
+```
+1. generate retinaface.wts from pytorch implementation https://github.com/wang-xinyu/Pytorch_Retinaface
+
+git clone https://github.com/wang-xinyu/Pytorch_Retinaface.git
+// download its weights 'Resnet50_Final.pth', put it in Pytorch_Retinaface/weights
+cd Pytorch_Retinaface
+python detect.py --save_model
+python genwts.py
+// a file 'retinaface.wts' will be generated.
+
+2. put retinaface.wts into tensorrtx/retinaface, build and run
+
+git clone https://github.com/wang-xinyu/tensorrtx.git
+cd tensorrtx/retinaface
+// put retinaface.wts here
+mkdir build
+cd build
+cmake ..
+make
+sudo ./retina_r50 -s  // build and serialize model to file i.e. 'retina_r50.engine'
+wget https://github.com/TencentYoutuResearch/FaceDetection-DSFD/raw/master/data/worlds-largest-selfie.jpg
+sudo ./retina_r50 -d  // deserialize model file and run inference.
+
+3. check the images generated, as follows. result.jpg
+```
+
+<p align="center">
+<img src="https://user-images.githubusercontent.com/15235574/78887294-2d2d9f80-7a92-11ea-90a5-38e84a87282e.jpg">
+</p>