Graphics Reference
In-Depth Information
The performance oriented assessment methods are utilized to measure the effectiveness of
aspecific task whereas appreciation oriented methods measure and quantify the perceptual
attributes of new mediatypesanddecidewhetherthecontentispleasingornot.Appreciation
oriented quality evaluation methodologyforstereoscopicTVpicturesisdescribedinITU-
R BT.1438 recommendation
[103].
Most of the subjective evaluation procedures in this
recommendation are based on the ITU qualityevaluation recommendationforTVpictures
(i.e. ITU-R BT.500.11)
[104].
In addition to the measurement of image quality, other 3D
perceptualattributeslikepresence,naturalnessandeyestraincanbemeasuredusingthesame
experimentalparadigms.Themainevaluationstrategiesmentionedin
[103]
are;
• Single-Stimulus-Continuous-Quality-Scale (SSCQS) method: The
quality is assessed individually for each stereoscopic image sequence in
the stimulus set.
• Stimulus comparison method: Series of stereoscopic image sequences are
presented sequentially in time and observers are asked to assign a relation
between two consecutive stereoscopic video sequences
• Double-Stimulus-Continuous-Quality-Scale (DSCQS) method: Alternately,
an unimpaired stereo image sequence (reference) and an impaired stereo image
sequence(test)areshown.Thereferenceandtestimagesequencesarepresented
twice. For both stereo image sequences (reference and test) observers assess the
overall picture quality separately.
