Search Results for author: Rachid Hedjam

Found 6 papers, 0 papers with code

Supervised Class-pairwise NMF for Data Representation and Classification

no code implementations28 Sep 2022 Rachid Hedjam, Abdelhamid Abdesselam, Seyed Mohammad Jafar Jalali, Imran Khan, Samir Brahim Belhaouari

The objective of this work is to design an evolutionary framework to learn the hyper-parameter of the parameterized NMF and estimate the factorizing matrices in a supervised way to be more suitable for classification problems.

Classification

Non-Negative Matrix Factorization with Scale Data Structure Preservation

no code implementations22 Sep 2022 Rachid Hedjam, Abdelhamid Abdesselam, Abderrahmane Rahiche, Mohamed Cheriet

The model described in this paper belongs to the family of non-negative matrix factorization methods designed for data representation and dimension reduction.

Clustering Dimensionality Reduction

MUG: A Parameterless No-Reference JPEG Quality Evaluator Robust to Block Size and Misalignment

no code implementations12 Sep 2016 Hossein Ziaei Nafchi, Atena Shahkolaei, Rachid Hedjam, Mohamed Cheriet

The proposed metric called median of unique gradients (MUG) is based on the very simple facts of unique gradient magnitudes of JPEG compressed images.

No-Reference Image Quality Assessment NR-IQA

Mean Deviation Similarity Index: Efficient and Reliable Full-Reference Image Quality Evaluator

no code implementations26 Aug 2016 Hossein Ziaei Nafchi, Atena Shahkolaei, Rachid Hedjam, Mohamed Cheriet

Motivated by a recent work that utilizes the standard deviation pooling, a general formulation of the DP is presented in this paper and used to compute a final score from the proposed GS and CS maps.

Image Compression Image Quality Assessment +1

Deviation Based Pooling Strategies For Full Reference Image Quality Assessment

no code implementations26 Apr 2015 Hossein Ziaei Nafchi, Rachid Hedjam, Atena Shahkolaei, Mohamed Cheriet

In this paper, we propose to use the mean absolute deviation (MAD) and show that it is a more robust and accurate pooling strategy for a wider range of IQAs.

Image Quality Assessment

A maximal-information color to gray conversion method for document images: Toward an optimal grayscale representation for document image binarization

no code implementations25 Jun 2013 Reza Farrahi Moghaddam, Shaohua Chen, Rachid Hedjam, Mohamed Cheriet

A novel method to convert color/multi-spectral images to gray-level images is introduced to increase the performance of document binarization methods.

Binarization

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