DocumentCode :
1333675
Title :
Towards a New Quality Metric for 3-D Synthesized View Assessment
Author :
Bosc, Emilie ; Pépion, Romuald ; Le Callet, Patrick ; Köppel, Martin ; Ndjiki-Nya, Patrick ; Pressigout, Muriel ; Morin, Luce
Author_Institution :
IETR, Inst. Nat. des Sci. Appliques de Rennes, Rennes, France
Volume :
5
Issue :
7
fYear :
2011
Firstpage :
1332
Lastpage :
1343
Abstract :
3DTV technology has brought out new challenges such as the question of synthesized views evaluation. Synthesized views are generated through a depth image-based rendering (DIBR) process. This process induces new types of artifacts whose impact on visual quality has to be identified considering various contexts of use. While visual quality assessment has been the subject of many studies in the last 20 years, there are still some unanswered questions regarding new technological improvement. DIBR is bringing new challenges mainly because it deals with geometric distortions. This paper considers the DIBR-based synthesized view evaluation problem. Different experiments have been carried out. They question the protocols of subjective assessment and the reliability of the objective quality metrics in the context of 3DTV, in these specific conditions (DIBR-based synthesized views), and they consist in assessing seven different view synthesis algorithms through subjective and objective measurements. Results show that usual metrics are not sufficient for assessing 3-D synthesized views, since they do not correctly render human judgment. Synthesized views contain specific artifacts located around the disoccluded areas, but usual metrics seem to be unable to express the degree of annoyance perceived in the whole image. This study provides hints for a new objective measure. Two approaches are proposed: the first one is based on the analysis of the shifts of the contours of the synthesized view; the second one is based on the computation of a mean SSIM score of the disoccluded areas.
Keywords :
digital television; rendering (computer graphics); stereo image processing; three-dimensional displays; 3D synthesized view assessment; 3DTV technology; DIBR-based synthesized view evaluation problem; depth image-based rendering process; disoccluded areas; geometric distortions; objective quality metrics; synthesized views evaluation; view synthesis algorithms; visual quality assessment; Cameras; Context; Extrapolation; Measurement; Protocols; Reliability; Stereo image processing; Depth image-based rendering (DIBR); multi-view; quality assessment; quality metrics; video plus depth; view synthesis;
fLanguage :
English
Journal_Title :
Selected Topics in Signal Processing, IEEE Journal of
Publisher :
ieee
ISSN :
1932-4553
Type :
jour
DOI :
10.1109/JSTSP.2011.2166245
Filename :
6029277
Link To Document :
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