Introduction

This repository contains implementations of 5 classical zero-shot algorithms (SAE, ALE, SJE, ESZSL, and DeViSE) in the usual as well as the Generalized zero-shot learning (GZSL) settings using the Proposed Split and evaluation protocols (eg. Class-Averaged Top-1 Accuracy) outlined in Zero-Shot Learning - A Comprehensive Evaluation of the Good, the Bad and the Ugly (ZSLGBU) by Yongqin Xian, Christoph H. Lampert, Bernt Schiele, Zeynep Akata (TPAMI 2018).

This is the first public implementation of SAE, ALE, SJE and DeViSE under the ZSLGBU protocol. An existing implementation of ESZSL can be found here (thanks to @sbharadwajj). To this, I have added the GZSL functionality.

Reference Papers

The original papers corresponding to the 5 algorithms are:

[1] SAE (Semantic Autoencoder) - Semantic Autoencoder for Zero-Shot Learning. Elyor Kodirov, Tao Xiang, Shaogang Gong. CVPR, 2017.

[2] ALE (Attribute Label Embedding) - Label-Embedding for Image Classification. Zeynep Akata, Florent Perronnin, Zaid Harchaoui, Cordelia Schmid. TPAMI, 2016.

[3] SJE (Structured Joint Embedding) - Evaluation of Output Embeddings for Fine-Grained Image Classification. Zeynep Akata, Scott Reed, Daniel Walter, Honglak Lee, Bernt Schiele. CVPR, 2015.

[4] ESZSL - An embarrassingly simple approach to zero-shot learning. Bernardino Romera-Paredes, Philip H. S. Torr. ICML, 2015.

[5] DeViSE - DeViSE: A Deep Visual-Semantic Embedding Model. Andrea Frome*, Greg S. Corrado*, Jonathon Shlens*, Samy Bengio, Jeffrey Dean, Marc’Aurelio Ranzato, Tomas Mikolov. NIPS, 2013.

Data Splits

Dataset	Total Images	Attributes	Class Split (Tr+Val+Ts)		ZSL				GZSL
				tr	val	ts	tr	val	tr+val	ts seen	ts unseen
SUN	14340	102	580+65+72	11600	1300	1440	9280	1040	10320	2580	1440
CUB	11788	312	100+50+50	5875	2946	2967	4702	2355	7057	1764	2967
AWA1	30475	85	27+13+10	16864	7926	5685	13460	6372	19832	4958	5685
AWA2	37322	85	27+13+10	20218	9191	7913	16187	7340	23527	5882	7913
aPY	15339	64	15+5+12	6086	1329	7924	4906	1026	5932	1483	7924

Code

Each folder above has its own README with running instructions, results and their comparisons with those reported in ZSLGBU. I have also put existing code references wherever relevant.

Setup

git clone https://github.com/mvp18/Popular-ZSL-Algorithms.git
cd Popular-ZSL-Algorithms
bash setup.sh

This downloads data (splits, Res101 features and class embeddings) corresponding to the Proposed Split for AWA1, AWA2, CUB, SUN and aPY. To know more about the individual files, refer to the README.txt file available inside xlsa17 folder.

TODOs

• GZSL expts for ALE
• GZSL expts for DeViSE
• GZSL expts for SJE

Contributing

If you find any errors, kindly raise an issue and I will get back to you ASAP.