[Doc] Add 2.4 release notes (#1731)

Author: aigcliu

README.md

@@ -8,6 +8,7 @@ English | [简体中文](README_CN.md)
 
 **A High-Efficient Development Toolkit for Image Segmentation based on [PaddlePaddle](https://github.com/paddlepaddle/paddle).**
 
+[![Build Status](https://travis-ci.org/PaddlePaddle/PaddleSeg.svg?branch=release/2.1)](https://travis-ci.org/PaddlePaddle/PaddleSeg)
 [![License](https://img.shields.io/badge/license-Apache%202-blue.svg)](LICENSE)
 [![Version](https://img.shields.io/github/release/PaddlePaddle/PaddleSeg.svg)](https://github.com/PaddlePaddle/PaddleSeg/releases)
 ![python version](https://img.shields.io/badge/python-3.6+-orange.svg)
@@ -19,9 +20,21 @@ English | [简体中文](README_CN.md)
 
 ## News <img src="./docs/images/seg_news_icon.png" width="40"/>
 
-* [2022-01-04] We published a paper on portrait segmentation named [PP-HumanSeg](./contrib/PP-HumanSeg/paper.md), and released Semantic Connectivity-aware Learning (SCL) framework and a Large-Scale Teleconferencing Video Dataset.
-* [2021-10-11] We released PaddleSeg v2.3 with the improved interactive segmentation tool ([EISeg v0.3](./EISeg)), two [matting]((./contrib/Matting)) algorithms, and segmentation model compression.
-* For more information please refer to [Release Note](https://github.com/PaddlePaddle/PaddleSeg/releases).
+<ul class="nobull">
+ <li>[2021-01-20] PaddleSeg v2.4 is released! More details in <a href="https://github.com/PaddlePaddle/PaddleSeg/releases">Release Notes</a>.</li>
+ <ul>
+        <li>Upgrade the interactive annotation tool <a href="./EISeg">EISeg v0.4</a> with faster inference speed, supporting new areas in remote sensing and medical segmentation.</li>
+        <li>Publish the <a href="./contrib/PP-HumanSeg/paper.md">PP-HumanSeg</a> paper, and released Semantic Connectivity-aware Learning framework and a Large-Scale Teleconferencing Video Dataset.</li>
+        <li>Release <a href="./contrib/Matting">PP-HumanMatting</a> for extremely fine-grained human segmentation, with an Android tutorial.</li>
+        <li>Add 9 semantic segmentatioin models, including a new transformer model <a href="configs/segmenter">SegMenter</a>.</li>
+        <li>Provide a comprehensive <a href="docs/model_zoo_overview.md">performance table</a> for all segmentation models, which helps to choose a better model on the accuracy and the speed.</li>
+    </ul> 
+   
+ 
+ <li>[2021-10-11] We released PaddleSeg v2.3 with the improved interactive segmentation tool EISeg v0.3, two matting algorithms, and segmentation model compression.</li>
+ <li>[2021-09-20] We published an interactive segmentation <a href="https://arxiv.org/abs/2109.09406">paper</a> with SOTA performance on several well-known datasets.</li>
+</ul>
+
 
 ## Introduction
 

README_CN.md

@@ -19,10 +19,14 @@
 
 ## 最新动态 <img src="./docs/images/seg_news_icon.png" width="40"/>
 
-* [2022-01-04] PaddleSeg团队发表人像分割论文[PP-HumanSeg](./contrib/PP-HumanSeg/paper.md)，并开源连通性学习（SCL）方法和大规模视频会议数据集。
-* [2021-10-11] PaddleSeg 2.3版本发布交互式分割工具([EISeg v0.3](./EISeg)), 开源两种 [Matting](./contrib/Matting) 算法, 以及分割高阶功能[模型蒸馏](./slim/distill)和[模型量化](./slim/quant)方案。
+* [2022-01-20] PaddleSeg 2.4版本发布！详细发版信息请参考[Release Note](https://github.com/PaddlePaddle/PaddleSeg/releases)。
+  * 发布智能标注工具[EISeg v0.4](./EISeg)版，采用静态图预测加速交互过程，并支持遥感和医疗领域智能标注。
+  * 发表人像分割论文[PP-HumanSeg](./contrib/PP-HumanSeg/paper.md)，并开源连通性学习（SCL）方法和大规模视频会议数据集。
+  * 开源发丝级人像抠图Matting算法[PP-HumanMatting](./contrib/Matting)，并提供安卓端教程。
+  * 新增9个经典分割模型, 包括Transformer系列模型[SegMenter](configs/segmenter)，总模型数达到40个。
+  * 提供分割模型[性能对比图](docs/model_zoo_overview_cn.md)，全面展示分割模型性能，方便模型选型。
+* [2021-10-11] PaddleSeg 2.3版本发布交互式分割工具EISeg v0.3, 开源两种[Matting](./contrib/Matting)算法, 以及分割高阶功能[模型蒸馏](./slim/distill)和[模型量化](./slim/quant)方案。
 * [2021-09-20] PaddleSeg团队发表交互式分割论文[EdgeFlow](https://arxiv.org/abs/2109.09406)，已在多个数据集实现SOTA性能。
-* 详细发版信息请参考[Release Note](https://github.com/PaddlePaddle/PaddleSeg/releases).
 
 ## 简介
 PaddleSeg是基于飞桨PaddlePaddle开发的端到端图像分割开发套件，涵盖了**高精度**和**轻量级**等不同方向的大量高质量分割模型。通过模块化的设计，提供了**配置化驱动**和**API调用**两种应用方式，帮助开发者更便捷地完成从训练到部署的全流程图像分割应用。