RECOVERY OF THE RESPONSE CURVE OF A DIGITAL IMAGING PROCESS BY DATA-CENTRIC REGULARIZATION

Johannes Herwig, Josef Pauli

2009

Abstract

A method is presented that fuses multiple differently exposed images of the same static real-world scene into a single high dynamic range radiance map. Firstly, the response function of the imaging device is recovered, that maps irradiating light at the imaging sensor to gray values, and is usually not linear for 8-bit images. This nonlinearity affects image processing algorithms that do assume a linear model of light. With the response function known this compression can be reversed. For reliable recovery the whole set of images is segmented in a single step, and regions of roughly constant radiance in the scene are labeled. Under- and overexposed parts in one image are segmented without loss of detail throughout the scene. From these segments and a parametrization of digital film the slope of the response curve is estimated, whereby various noise sources of an imaging sensor have been modeled. From its slope the response function is recovered and images are fused. The dynamic range of outdoor environments cannot be captured by a single image. Valuable information gets lost because of under- or overexposure. A radiance map overcomes this problem and makes object recognition or visual self-localisation of robots easier.

Paper Citation

in Harvard Style

Herwig J. and Pauli J. (2009). RECOVERY OF THE RESPONSE CURVE OF A DIGITAL IMAGING PROCESS BY DATA-CENTRIC REGULARIZATION . In Proceedings of the Fourth International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2009) ISBN 978-989-8111-69-2, pages 539-546. DOI: 10.5220/0001804705390546

in Bibtex Style

@conference{visapp09,
author={Johannes Herwig and Josef Pauli},
title={RECOVERY OF THE RESPONSE CURVE OF A DIGITAL IMAGING PROCESS BY DATA-CENTRIC REGULARIZATION},
booktitle={Proceedings of the Fourth International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2009)},
year={2009},
pages={539-546},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001804705390546},
isbn={978-989-8111-69-2},
}

in EndNote Style

TY - CONF
JO - Proceedings of the Fourth International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2009)
TI - RECOVERY OF THE RESPONSE CURVE OF A DIGITAL IMAGING PROCESS BY DATA-CENTRIC REGULARIZATION
SN - 978-989-8111-69-2
AU - Herwig J.
AU - Pauli J.
PY - 2009
SP - 539
EP - 546
DO - 10.5220/0001804705390546