Generalized Image Acquisition and Analysis

From Capture to Simulation - Connecting Forward and Inverse Problems in Fluids

We explore the connection between fluid capture, simulation and proximal methods, a class of algorithms commonly used for inverse problems in image processing and computer vision. Our key finding is that the proximal operator constraining fluid velocities to be divergence-free is directly equivalent to the pressure-projection methods commonly used in incompressible flow solvers. This observation lets us treat the inverse problem of fluid tracking as a constrained flow problem all while working in an efficient, modular framework. In addition it lets us tightly couple fluid simulation into flow tracking, providing a global prior that significantly increases tracking accuracy and temporal coherence as compared to previous techniques. We demonstrate how we can use these improved results for a variety of applications, such as re-simulation, detail enhancement, and domain modification. We furthermore give an outlook of the applications beyond fluid tracking that our proximal operator framework could enable by exploring the connection of deblurring and fluid guiding.



Software Update

The MATLAB Color Calibration Toolbox v2.1 (minor update) has been updated. No new functionalities this time; added error tolerance against missing packages.


Eurographics 2014 Introduction to Optimization Techniques in Computer Graphics

Slides are online here.


GIAnA associated with the Laboratoire Photonique, Numerique et Nanosciences (LP2N)

We will create a computational optics group at the LP2N.


GIAnA joined INRIA

Generalized Image Acquisition and Analysis moved to Bordeaux to join the manao team.


Emmy-Noether Group

Generalized Image Acquisition and Analysis is now supported by an Emmy-Noether grant.


Software Update

The MATLAB Color Calibration Toolbox has been updated and is now supporting radiometric response curve estimation.


In the press

Johannes Kepler University Linz is reporting about our E-Lecture on Computational Photography last summer term. It was the first remote-only lecture for JKU. Eleven students attended the course at JKU.


In the press

Our work on dynamically displaying BRDFs is going to be featured in the September issue of 3D World, a magazine for 3D artists, covering SIGGRAPH's Emerging Technologies where we will demo our work. Matthias Hullin is quoted as "I don't expect a BRDF display to become available in the next 20 years. The principle on which the Nintendo 3DS is based was patented back in 1913!" -->


Webpage updated

Projects have been imported from previous webpage.
Several changes of the webpage regarding look and usage.