GRIFT Group CRISTAL Laboratory

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GRIFT, short for Groupe de Recherche Images et Formes de Tunisie, is the Computer Vision and Machine Learning research group within the CRISTAL Laboratory (Center for Research in Networks, Images, Systems, Architecture, and Multimedia) at ENSI (The National School of Computer Science, Manouba University). Established in 1999 by Professor Faouzi Ghorbel, GRIFT has become a reference in advanced Geometric Machine Learning, Statistical Shape, Image analysis, Pattern recognition, and Intelligent systems.

The GRIFT group introduces methods that are:

• Invariant to transformations such as rotation, translation, and scaling
• Equivariant representations preserving geometric relationships
• Stable and robust to noise, occlusion, and deformation

Our research covers the following key areas:

• Shape Descriptors and Invariants: Design of novel descriptors for 2D/3D shape analysis
• Geometric Deep Learning: Adapting neural networks to non-Euclidean domains such as point clouds, meshes, and manifolds
• Image Morphing and Registration: Non-linear matching and interpolation of images and 3D shapes for applications like data augmentation and medical imaging
• 3D Face Analysis: Classification, reconstruction, and morphing of 3D face point clouds using geometry-aware algorithms
• Cultural Heritage and Biomedical Applications: Recognition and enhancement of visual data from heritage artifacts and medical scans
• Remote Sensing and Hyperspectral Image Analysis: Dimensionality reduction, classification, and fusion of multisource remote sensing data

Our interdisciplinary approach bridges theory and application, aiming to produce scientifically sound and practically relevant methods.

Conferences

Since 2000, the GRIFT research group has actively organized several national and international conferences and workshops, promoting research in image processing, shape analysis, and artificial intelligence.

TAIMA 2025 (Upcoming)

Planned for June 2025 | Dijon, France

A forward-looking edition focused on emerging topics and collaborations.

PHARES 2025

January 2025 | Ain Draham, Tunisia

A scientific event focused on pattern recognition and AI, bringing together the research community.

TAIMA Entreprise 2023

June 2023 | Sidi Dhrif, Tunisia

A dedicated edition aimed at bridging academia and industry, highlighting industrial applications of computer vision and AI.

TAIMA 2023

Mai 2023 | Hammamet, Tunisia

The latest scientific edition of TAIMA, featuring state-of-the-art research in image analysis, shape processing, and machine learning.

TAIMA 2022

Mai 2022 | Hammamet, Tunisia

A major conference gathering researchers in the fields of Computer Vision, AI, and applied mathematics.

RFMI 2019

December 2019 | Sidi Bou Said, Tunisia

An international scientific event focused on pattern recognition and AI.

AICO 2018

December 2018 | Hammamet, Tunisia

A scientific event focused on pattern recognition and AI, bringing together the research community.

RFMI 2017

December 2017 | Savoie, France

An international scientific event focused on pattern recognition and AI.

PHARES 2017

Mai 2017 | Hammamet, Tunisia

A scientific event focused on pattern recognition and AI, bringing together the research community.

Internships

Interested in contributing to cutting-edge research? Send your resume and cover letter to emna.ghorbel@ensi-uma.tn.

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