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# Welcome in the Image and Signal Processing Group

Researchers of the ISPGroup use and develop signal and image processing techniques for applications like:

• Signal Acquisition, Compression & Streaming
• (Multiple) Object Tracking
• Content-based Data Retrieval
• Biomedical Signal & Medical Image Processing
• Watermarking of Multi-Dimensional Signals
• Compressed Sensing and Inverse Problem Solving (e.g., in Optics, Astronomy, Medical Imaging)
• Hyperspectral Imaging: Theory, Models, Algorithms and Bio-Medical Applications
• Tomographic Methods in Bio-Medical Applications (CT, CBCT, ...)
• Sparse Signal Representation, Restoration and Processing
• Quantitative Analysis of Microscopy Images
• Machine Learning and Deep Learning for Image Processing and Computer Vision
• ...

## News

Next and Last ISP Seminars:

## The ISPGroup is active in the following main research topics:

 Sensing, Imaging and Rendering: What is the most efficient way to sense a signal or to image reality? How can the sensing stage already "compute" information in a way that "just the information we need" is captured? This is the general research topic that we address here. This covers fields like, inverse problem solving, compressed sensing and compressive imaging, data restoration techniques, hyperspectral and light field imaging, or virtual view point rendering.
 Representation and Communication: How can we efficiently represent an image signal, or general data in as few parameter as possible? Which kind of (greedy) algorithm can deduce such parameters? How can this "sparse" representation be transmitted in a compact bitstream, potentially under latency and bitbudget constraints? How can we adapt the forwarded content to semantic user requirements? How can we build personalized summaries of edited video feeds automatically?
 Analysis and Interpretation: Video are segmented into semantically meaningful objects, based on texture and motion analysis. Images descriptors are extracted to characterize visual contents. Targets of interest are detected, recognized, and tracked to understand behaviors in natural scenes. Application domains include autonomous production of visual reports (e.g. for team sport events), but also intelligent vision in surveillance, or cells images analysis in biology.
 Medical Image Processing: Our group develops image & signal processing tools and models for the use in various medical contexts, including radiotherapy, proton therapy, brachytherapy, surgery, EEG analysis, kinematic, diffusion tensor imaging, etc.

## Focus on a randomly picked research topic:

 Consistent Basis Pursuit in Quantized Compressed Sensing: This project focuses on the estimation of low-complexity signals when they are observed through {$M$} uniformly quantized compressive observations. Among such signals, we consider 1-D sparse vectors, low-rank matrices, or compressible signals that are well approximated by one of these two models. In this context, we prove the estimation efficiency of a variant of Basis Pursuit Denoise, called Consistent Basis Pursuit (CoBP), enforcing consistency between the observations and the re-observed estimate, while promoting its low-complexity nature.