update link of arxiv paper and supp video

README.md

@@ -1,12 +1,39 @@
-<h1 align="center">MODNet: Is a Green Screen Really Necessary for Real-Time Human Matting?</h1>
+<h2 align="center">MODNet: Is a Green Screen Really Necessary for Real-Time Portrait Matting?</h2>
 
-This is the official project of our paper [Is a Green Screen Really Necessary for Real-Time Human Matting?]().
+<img src="doc/gif/homepage_demo.gif" width="100%">
+
+<p align="center">
+  <a href="https://arxiv.org/pdf/2011.11961.pdf">Arxiv Preprint</a> |
+  <a href="https://youtu.be/PqJ3BRHX3Lc">Supplementary Video</a>
+</p>
+
+<div align="center">This is the official project of our paper <b>Is a Green Screen Really Necessary for Real-Time Portrait Matting?</b></div>
+<div align="center">MODNet is a <b>trimap-free</b> model for portrait matting in <b>real time</b> (on a single GPU).</div>
+<div align="center">Our amazing demo, code, pre-trained model, and validation benchmark are coming soon!</div>
 
 
+---
 
-[Arxiv Preprint]() | [Supplementary Video]() 
-
+## Announcement
+I have received some requests for accessing our code. I am sorry that we need some time to get everything ready since this repository is now supported by Zhanghan Ke alone. Our plans in the next few months are:
+- We will publish an online image/video matting demo along with the pre-trained model **in these two weeks (approximately Dec. 7, 2020 to Dec. 18, 2020)**.
+- We then plan to release the code of supervised training and unsupervised SOC in Jan. 2021.
+- We finally plan to open source the PPM-100 validation benchmark in Feb. 2021.
 
+We look forward to your continued attention to this project. Thanks.
 
 ## News
+- [Nov 24 2020] Release [Arxiv Preprint](https://arxiv.org/pdf/2011.11961.pdf) and [Supplementary Video](https://youtu.be/PqJ3BRHX3Lc).
 
+## Citation
+If this work helps your research, please consider to cite:
+
+```bibtex
+@article{MODNet,
+  author = {Zhanghan Ke and Kaican Li and Yurou Zhou and Qiuhua Wu and Xiangyu Mao and Qiong Yan and Rynson W.H. Lau},
+  title = {Is a Green Screen Really Necessary for Real-Time Portrait Matting?},
+  journal={ArXiv},
+  volume={abs/2011.11961},
+  year = {2020},
+}
+```