Generalized Image Acquisition and Analysis

Sensor Saturation in Fourier Multiplexed Imaging

Optically multiplexed image acquisition techniques have become increasingly popular for encoding different exposures, color channels, light-fields, and other properties of light onto two-dimensional image sensors. Recently, Fourier-based multiplexing and reconstruction approaches have been introduced in order to achieve a superior light transmission of the employed modulators and better signal-to-noise characteristics of the reconstructed data. We show in this paper that Fourier-based reconstruction approaches suffer from severe artifacts in the case of sensor saturation, i.e. when the dynamic range of the scene exceeds the capabilities of the image sensor. We analyze the problem, and propose a novel combined optical light modulation and computational reconstruction method that not only suppresses such artifacts, but also allows us to recover a wider dynamic range than existing image-space multiplexing approaches.

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.