Generalized Image Acquisition and Analysis

Eikonal Rendering: Efficient Light Transport in Refractive Objects

We present a new method for real-time rendering of sophisticated lighting effects in and around refractive objects. It enables us to realistically display refractive objects with complex material properties, such as arbitrarily varying refraction index, inhomogeneous attenuation, as well as spatially-varying anisotropic scattering and reflectance properties. User-controlled changes of lighting positions only require a few seconds of update time. Our method is based on a set of ordinary differential equations derived from the eikonal equation, the main postulate of geometric optics. This set of equations allows for fast casting of bent light rays with the complexity of a particle tracer. Based on this concept, we also propose an efficient light propagation technique using adaptive wavefront tracing. Efficient GPU implementations for our algorithmic concepts enable us to render visual effects that were previously not reproducible in this combination in real-time.

News

2014-07-01

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.

2014-05-01

Eurographics 2014 Introduction to Optimization Techniques in Computer Graphics

Slides are online here.

2014-05-01

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

We will create a computational optics group at the LP2N.

2013-03-01

GIAnA joined INRIA

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

2012-08-01

Emmy-Noether Group

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

2012-07-19

Software Update

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

2011-09-28

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.

2011-07-27

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!" -->

2011-04-27

Webpage updated

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