Designing Quality Metrics
In most of the
existing image quality assessment approaches, the main objective is to develop measures that are
consistent with the subjective evaluation. Therefore, the performance of a
given image quality metric is evaluated against the MOS determined from a series of
subjective tests performed on a database. A plethora of image quality metrics
has been developed. The research aims at finding invariance laws with which one
may test image quality metrics. The oral presentation [1] shows a new
viewpoint. Paper [2] focuses on one specific property, namely the sensitivity
to background luminance. It shows on synthetic images that Weber’s law is not
consistent with human visual system (HVS), a photometric invariance principle
is proposed and an algorithm is derived to test whether a given quality metric
complies with Weber’s law or with that specific property of HVS (qualityMetric2Alpha.m, psnr.m, ssim.m,
ssim_index.m, vdp.m).
List of Publications
[1]
G. Dauphin, A. Beghdadi, A. Bouzerdoum, HVS-Inspired Image Processing: An Overview, In
Proceeding of the 1st International Workshop on Visual Signal Processing and
its Applications, Université Paris 13, 12-13 November
2008. VISPA'08.
[2] G. Dauphin and P. Viaris
de Lesegno, Assessment of Quality Metrics with
Reference Based on Uniform Colour Spaces. In Proceeding of 2nd European
Workshop on Visual Information Processing. 6 pages,
Dauphin10_paper.pdf
Dauphin10_lecture.mp3
A. Beghdadi, G.
Dauphin, A. Bouzerdoum, Image Analysis Using Local
Band Directional Contrast. In Proceeding of the International Symposium on
Intelligent Multimedia, Video and Speech Processing,
G. Dauphin, A. Beghdadi
and P. Viaris de Lesegno, A
Local Directional Bandlimited Contrast, In Proceeding
of International Symposium on Signal Processing and its Applications, 4 pages,
Paris, France, 2003, ISSPA'03.
P. Bonnin, O. Stasse, V. Hugel, P. Blazevic, G. Dauphin, Towards a Method to Compare and to
Evaluate Fast Pixel Gathering Mechanisms For Real Time Robotic Vision Systems.
In Proceeding of International Symposium on Signal Processing and its
Applications, 4 pages,