5 original grayscale images were used, 100 distorted images were generated from 10 watermarking algorithms with 2 embedding strengths. These algorithms have the advantage to generate very different type of distortions. 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 16 observers. Distortions for each processing and each image have been optimised in order to uniformly cover the subjective scale.
Still images and a Microsoft Excel spreadsheet, giving all subjective quality scores is included in one archive at HTTP (20MB): Link: http://www.irccyn.ec-nantes.fr/~autrusse/Databases/Enrico/Enrico.zip Qualinet Databases Mirror: Link: ftpes://multimediatech.cz/IRCCyN_IVC/IRCCyN_IVC_Enrico Username: dbq-mirrors Password: kucykepe
References and Citation
Please, cite the following paper in your reference if you use this database for your work [MAL07].
LAC08: P. Le Callet, F. Autrusseau, P. Campisi, "Visibility control and Quality assessment of watermarking and data hiding algorithms", Chap IX in Multimedia Forensics and Security, Idea Group Publishing, Editor: Chang-Tsun Li, pp. 163-192, ISBN: 978-1-59904-869-7, April 2008.
MAL07: E. Marini, F. Autrusseau, P. Le Callet, P. Campisi, "Evaluation of standard watermarking techniques", in SPIE Electronic Imaging, Security, Steganography, and Watermarking of Multimedia Contents IX, San Jose , USA, January 2007.