Subjective quality assessment - Selective Encryption  database

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

8 original color images were used, 200 distorted images were generated from 5 different encryption techniques with 5 parameters.

Subjective evaluations were made at viewing distance of 6 times the screen height using a "Pair Comparison" protocol  method with 5 categories and 21 observers. Distortions for each processing and each image have been optimised in order to uniformly cover the subjective scale.

Download

Download the IVC-SelectEncrypt database (47 MB zip file)
A Microsoft Excel spreadsheet, giving all subjective quality scores is included in the above archive.

How to cite the IVC-SelectEncrypt database

If you use BibTeX, here's the citation:

	@misc{ivcselectencrypt,
	title = {Subjective quality assessment of selective encryption techniques},
	author = {Autrusseau, Florent, and Stuetz, Thomas, and Pankajakshan, Vinod},
	year = {2010},
	note = {http://www.irccyn.ec-nantes.fr/~autrusse/Databases/}
	}

If you don't use BibTeX, use simply:

	Florent Autrusseau, Thomas Stuetz and Vinod Pankajakshan
	Subjective quality assessment of selective encryption techniques
	http://www.irccyn.ec-nantes.fr/~autrusse/Databases/

The source code for running the subjective experiment can be found here:
http://www.irccyn.ec-nantes.fr/~autrusse/jnd/SDLPairComp.zip
and a brief explanation on the protocol is right there.