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[IJCAI18] SSR-Net: A Compact Soft Stagewise Regression Network for Age Estimation

Last update: 2018/08/06 (Adding MegaAge-Asian dataset.)

<img src="https://media.giphy.com/media/ygBDe4FIU4Cybbfh2N/giphy.gif" height="240"/> <img src="https://media.giphy.com/media/bZvHMOp2hBsusr96fa/giphy.gif" height="240"/>

<img src="https://github.com/shamangary/SSR-Net/blob/master/demo/TGOP_tvbs.png" height="240"/> <img src="https://github.com/shamangary/SSR-Net/blob/master/demo/the_flash_cast.png" height="240"/>

<img src="https://github.com/shamangary/SSR-Net/blob/master/table1.png" height="240"/> <img src="https://github.com/b02901145/SSR-Net_megaage-asian/blob/master/paper_images/magaage_asian_CA.png" height=120>

Paper

PDF

https://github.com/shamangary/SSR-Net/blob/master/ijcai18_ssrnet_pdfa_2b.pdf

Authors

Tsun-Yi Yang, Yi-Husan Huang, Yen-Yu Lin, Pi-Cheng Hsiu, and Yung-Yu Chuang

Abstract

This paper presents a novel CNN model called Soft Stagewise Regression Network (SSR-Net) for age estimation from a single image with a compact model size. Inspired by DEX, we address age estimation by performing multi-class classification and then turning classification results into regression by calculating the expected values. SSR-Net takes a coarse-to-fine strategy and performs multi-class classification with multiple stages. Each stage is only responsible for refining the decision of the previous stage. Thus, each stage performs a task with few classes and requires few neurons, greatly reducing the model size. For addressing the quantization issue introduced by grouping ages into classes, SSR-Net assigns a dynamic range to each age class by allowing it to be shifted and scaled according to the input face image. Both the multi-stage strategy and the dynamic range are incorporated into the formulation of soft stagewise regression. A novel network architecture is proposed for carrying out soft stagewise regression. The resultant SSR-Net model is very compact and takes only 0.32 MB. Despite of its compact size, SSR-Net’s performance approaches those of the state-of-the-art methods whose model sizes are more than 1500x larger.

Platform

Codes

This repository is for MegaAge-Asian datasets. There are three different section of this project.

We will go through the details in the following sections.

Data pre-processing

python TYY_Megaage_asian_create_db.py

Training

bash run_ssrnet_megaage.sh
bash run_megaage_MobileNet.sh
bash run_megaage_DenseNet.sh

Testing

Create predicted results and calculate CA (cumulative accuracy)

bash run_CA.sh