Search Results for author: Ali Zafari

Found 10 papers, 0 papers with code

Laplacian-guided Entropy Model in Neural Codec with Blur-dissipated Synthesis

no code implementations24 Mar 2024 Atefeh Khoshkhahtinat, Ali Zafari, Piyush M. Mehta, Nasser M. Nasrabadi

The global spatial context is built upon the Transformer, which is specifically designed for image compression tasks.

Decoder Image Compression +1

Neural-based Compression Scheme for Solar Image Data

no code implementations6 Nov 2023 Ali Zafari, Atefeh Khoshkhahtinat, Jeremy A. Grajeda, Piyush M. Mehta, Nasser M. Nasrabadi, Laura E. Boucheron, Barbara J. Thompson, Michael S. F. Kirk, Daniel da Silva

In this work, we propose an adversarially trained neural network, equipped with local and non-local attention modules to capture both the local and global structure of the image resulting in a better trade-off in rate-distortion (RD) compared to conventional hand-engineered codecs.

Image Compression

Trading-off Mutual Information on Feature Aggregation for Face Recognition

no code implementations22 Sep 2023 Mohammad Akyash, Ali Zafari, Nasser M. Nasrabadi

The consistent improvement we observed in these benchmarks demonstrates the efficacy of our approach in enhancing FR performance.

Face Recognition

Multi-Context Dual Hyper-Prior Neural Image Compression

no code implementations19 Sep 2023 Atefeh Khoshkhahtinat, Ali Zafari, Piyush M. Mehta, Mohammad Akyash, Hossein Kashiani, Nasser M. Nasrabadi

In addition, we introduce a novel entropy model that incorporates two different hyperpriors to model cross-channel and spatial dependencies of the latent representation.

Image Compression

Multi-spectral Entropy Constrained Neural Compression of Solar Imagery

no code implementations19 Sep 2023 Ali Zafari, Atefeh Khoshkhahtinat, Piyush M. Mehta, Nasser M. Nasrabadi, Barbara J. Thompson, Michael S. F. Kirk, Daniel da Silva

Recently successful end-to-end optimized neural network-based image compression systems have shown great potential to be used in an ad-hoc manner.

Image Compression

Frequency Disentangled Features in Neural Image Compression

no code implementations4 Aug 2023 Ali Zafari, Atefeh Khoshkhahtinat, Piyush Mehta, Mohammad Saeed Ebrahimi Saadabadi, Mohammad Akyash, Nasser M. Nasrabadi

The design of a neural image compression network is governed by how well the entropy model matches the true distribution of the latent code.

Disentanglement Image Compression +1

A Quality Aware Sample-to-Sample Comparison for Face Recognition

no code implementations6 Jun 2023 Mohammad Saeed Ebrahimi Saadabadi, Sahar Rahimi Malakshan, Ali Zafari, Moktari Mostofa, Nasser M. Nasrabadi

Our method adaptively finds and assigns more attention to the recognizable low-quality samples in the training datasets.

Face Recognition

Attention-Based Generative Neural Image Compression on Solar Dynamics Observatory

no code implementations12 Oct 2022 Ali Zafari, Atefeh Khoshkhahtinat, Piyush M. Mehta, Nasser M. Nasrabadi, Barbara J. Thompson, Daniel da Silva, Michael S. F. Kirk

We have designed an ad-hoc ANN-based image compression scheme to reduce the amount of data needed to be stored and retrieved on space missions studying solar dynamics.

Image Compression

Some algebraic properties of a class of integral graphs determined by their spectrum

no code implementations25 May 2019 Jia-Bao Liu, S. Morteza Mirafzal, Ali Zafari

If all the eigenvalues of the adjacency matrix of the graph $\Gamma$ are integers, then we say that $\Gamma$ is an integral graph.

Combinatorics 05C50, 05C31

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