10 original grayscale images were used (5 natural images: BOWS2 DB and 5 art images: EROS DB), 120 distorted images were generated with 6 different embedding strength, and either with or without CSF weighting function. These “Broken Arrows” watermarking algorithm was used (see the “bows2” contest). 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 17 observers. Distortions for each processing and each image have been optimized 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 (27MB): Link: http://www.irccyn.ec-nantes.fr/~autrusse/Databases/BrokenArrows/BA_SubjExp.zip Still images and a Microsoft Excel spreadsheet, giving all subjective quality scores is included in one archive at HTTP: Link: http://www.irccyn.ec-nantes.fr/~autrusse/Databases/BrokenArrows/BA_SubjExp.zip Qualinet Databases Mirror: Link: ftpes://multimediatech.cz/IRCCyN_IVC/IRCCyN_IVC_BrokenArrows Username: dbq-mirrors Password: kucykepe
References and Citation
Please, cite the following paper in your reference if you use this database for your work [CPA10].
CPA10: 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.