The purpose of this page is to make available one subjective quality assessment from IRCCyN/IVC. The experiments were conducted in our lab in normalized conditions.
Content
12 original grayscale images were used (from the BOWS-2 contest), 120 distorted images were generated from 5 embedding strengths either in the wavelet domain (DWT) or using the Dual Tree Complex Wavelet transform (DT-CWT).
Subjective evaluations were made at viewing distance of 6 times the screen height using a DSIS (Double Stimulus Impairment Scale) method with 5 categories and 14 observers. Distortions for each processing and each image have been optimised in order to uniformly cover the subjective scale.
Download
Download the IVC-DWT vs DTCWT database (31 MB zip file)
A Microsoft Excel spreadsheet, giving all subjective quality scores is included in the above archive.
How to cite the IVC-DWTvsDTCWT database
If you use BibTeX, here's the citation:
@misc{ivcdwtvsdtcwt,
title = {DT-CWT versus DWT watermark embedding},
author = {Autrusseau, Florent, and Peter Meerwald
year = {2009},
note = {http://www.irccyn.ec-nantes.fr/~autrusse/Databases/}
}
If you don't use BibTeX, use simply:
Florent Autrusseau, Peter Meerwald
DWT versus DTCWT watermark embedding
http://www.irccyn.ec-nantes.fr/~autrusse/Databases/
Dissemination
This database was used in
- M. Carosi, V. Pankajakshan, F. Autrusseau, "Toward a simplified perceptual quality metric for watermarking applications", Proceedings of the SPIE Electronic Imaging, conf. 7542, January 2010, San Jose, CA, USA.
Many thanks to Romain Cousseau for his valuable help in setting up the experiment.