Sensory Information Processing Lab

what we do

The activity in the brain gives rise to the perceptions, behaviors, emotions and cognition that make us intelligent. Many of today's grand challenges involve understanding how the brain produces this intelligence and how to interface it with artificially intelligent systems for the benefit of society.

Recent technical advances are providing unprecedented opportunities for dynamic interactions between our engineered systems and the brain, including new techniques for recording and manipulating neural circuit activity as well as new machine learning systems that must integrate with human intelligence. While these advances provide new platforms for interfacing with the brain, we often lack a principled approach for what to do with this technology to be most effective.

The primary goal of the SIPLab is to develop the algorithmic foundations for interfacing, understanding and exploiting neural systems.

We aim to advance basic science, clinical medicine and the engineering of intelligent systems.

We pursue these objectives using direct and indirect (invasive and non-invasive) methods of integrating engineered systems in closed-loop interactions with biology across scales from single cells to human intelligence. I broadly describe this research as computational neuroengineering, where we combine the rigorous mathematical approaches of engineering (e.g., machine learning, signal processing) with a deep grounding in the sciences to improve our interactions between mind and machine.

These interactions lead us to new ways to conduct experiments to learn about neural systems, new ways to treat diseases of these systems, and new ways to build machines that learn from the intelligence embodied in these systems. It also often leads to advances in data science algorithms that have applications far beyond the original inspiration.

Focus areas are always evolving, but currently include algorithms and analysis for:

  • open-loop and closed-loop stimulation (electrical and optogenetic) of neural circuits;
  • interactive machine learning and interactive artificial intelligence (including similarity learning, transfer learning and cooperative search, etc.);
  • discovering and interpreting the structure of complex dynamical systems;
  • dimensionality reduction (including compressed sensing), manifold learning and dynamic filtering;
  • computational imaging in microscopy and remote sensing;
  • state estimation and other analysis algorithms for electrophysiology data;
  • fast numerical optimization algorithms for machine learning, including optimal transport regularization for inverse problems;
  • brain-computer interfaces; and
  • normative models of sensory information processing and neural computing, including novel neuromimetic computing approaches.

Technically, we approach this research using tools the core philosophy that high-dimensional data typically has information of interest that is low-dimensional and can be represented geometrically (e.g., linear subspaces, sparsity models, manifolds, and dynamical system attractors). Please see our publications for more information on our current research outcomes. SIPLab members are affiliated with the Neural Engineering Center and the Center for Signal and Information Processing at Georgia Tech.


Neuro-engineering at Atlanta Science Festival

Upcoming event titled "Neuro-Engineering: Blurring the Lines Between Mind and Machine" as part of the ASF. Come join us at Monday Night Garage on 2/12 to talk about innovations in neurotech and their ethical implications.

New preprint up

The preprint on the arXiv called "Sparse Bayesian Learning with Dynamic Filtering for Inference of Time-Varying Sparse Signals". New sparse regression methods for time-varying problems when the matrix is poorly conditioned.

Paper accepted at GlobalSIP

The paper "Interactive object segmentation with noisy binary inputs" will be presented at GloabalSIP 2018. Check out our latest results in building algorithms for brain-computer interfaces. Congrats Greg, Siva and Shaoheng!

Two CCN presentations

SIPLab members presented two posters at the Conference on Cognitive Computational Neuroscience. Take a look to learn about our recent results in theory and models about recurrent neural networks and representations for invariant vision!

Canal selected for summer school

Greg Canal was selected to attend the TRIPODS Summer School hosted by the Institute for Foundations of Data Science at UW-Madison in summer 2018. Congrats Greg!

Rozell selected for science communication fellowship

Dr. Rozell was selected to participate as a fellow in a training workshop at the Alan Alda Center for Communicating Science at Stony Brook University in summer 2018. The training is based on principles of improvisational theater to better engaging others in discussions about science and technology.