The IVC team has two psycho-visual test rooms in accordance with the international recommendations (ITU-R BT 500-11 for example). These recommendations allow to reproduce the tests all around the world like it have been done in Multi Media Test Plan of the Video Quality Expert Group (VQEG).
In this test rooms, we realize some psycho-visual measurements experiment like quality evaluation on still images or on videos with different formats and resolutions. These evaluations can be done by expert or non-expert people.
These rooms are used in a multimedia platform which have :
A multi protocol platform allow to measure different feedbacks about the contents under test.
Some methodologies allow to measure the absolute or relative quality.
Other methodologies allow to evaluate the perceptibility of an impairment.
In pair images, we can evaluated which one is the prefered image/video in term of quality, naturalness, luminosity point of view and so on. The power of the preference can also be evaluated.
Our multi display technology platform allow to measure the observer feedbacks with a protocol previously presented without any processing in the transmission channel.
There are different sizes, technologies and connections to choose the better solution according to the scenario.
This display diversity can be used to measure the impact of the display, with the realization of a test with several display.
An medical imaging system allow to realize some test with medical images, very high resolution images (up to 4096x2560 pixels) and High Dynamic Range images (up to 12 bits per pixels).
Before each test, all our displays are calibrated .
A multi player platform allow to display images and videos from the QCIF (or less) resolution to Full HD resolution. The videos are played uncompressed (to manage what are displayed), in real-time up to Full HD (1920x1080 pixels) in progressive up to 60Hz.
This platform also allow to record, in the same time to play, Full HD uncompressed videos in real-time. Its allowing to play, to process and to record, all in the same time, videos in real-time up to HD resolution up to 60Hz.
After each test, an analysis is done. This analysis is composed by the general computation like the Mean Opinion Score, the Confidence Interval and the outlier. Our analysis are completed by some statistical analysis to know if there is difference between two processings or to transform the scale of the result to allow the comparison with other methods and so on.
This platform has two main functions :
The aims of the subjective test realization are :
We are open for collaboration. If you have some project, please contact us.