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.
The "2AFC Evaluation of Wavelet Watermarking in the smooth areas" database aims at tracking the visibility threshold of an image watermarking method.The aim of this study was to determine the Just Noticeable Difference within the Wavelets (WavJND). A similar approach was experimented for HDR images (see
Content
10 original color images were used, 180 distorted images were
generated with 2 different embedding algorithms, for each image
(and each algorithm), 9 embedding strengths were used
(9x10x2=180). Target PSNRs for Broken Arrows were :
[30,32,34,36,38,40,42,44,46], whereas Target PSNRs for WavJND were
: [26,28,30,32,34,36,28,40,42].
Subjective evaluations were made at viewing distance of 6 times the screen height using a 2AFC (Two Alternative Forced Choice) protocol. Distortions for each processing and each image have been optimised in order to uniformly cover the visibility scale.
36 observers were enrolled in this experiment. 6 observers were
discarded due to incoherent assessments.
Download
The database is available upon request.
@inproceedings{ICIP2013,
author = {F. Autrusseau and D. Goudia},
title = {Non linear hybrid watermarking for High Dynamic Range Images},
booktitle = {IEEE International Conference on Image Processing, ICIP'2013},
year = {2013},
pages = {4527-4531},
url = {http://www.irccyn.ec-nantes.fr/~autrusse/Papers/ICIP2013.pdf}
}
If you don't use BibTeX :
F. Autrusseau, D. Goudia, "Non linear hybrid watermarking for High Dynamic Range Images",
in IEEE International Conference on Image Processing, ICIP'2013, pp. 4527-4531, Melbourne, Australia, Sept 15-18, 2013.