NDLI: Incremental depth upscaling using an edge weighted optimization concept

Content Provider	IEEE Xplore Digital Library
Author	Schwarz, S. Sjostrom, M. Olsson, R.
Copyright Year	2012
Description	Author affiliation: Mid Sweden University, SE-85170 Sundsvall, Sweden (Schwarz, S.; Sjostrom, M.; Olsson, R.)
Abstract	Precise scene depth information is a pre-requisite in three-dimensional television (3DTV), e.g. for high quality view synthesis in autostereoscopic multiview displays. Unfortunately, this information is not easily obtained and often of limited quality. Dedicated range sensors, such as time-of-flight (ToF) cameras, can deliver reliable depth information where (stereo-)matching fails. Nonetheless, since these sensors provide only restricted spatial resolution, sophisticated upscaling methods are sought-after, to match depth information to corresponding texture frames. Where traditional upscaling fails, novel approaches have been proposed, utilizing additional information from the texture for the depth upscaling process. We recently proposed the Edge Weighted Optimization Concept (EWOC) for ToF upscaling, using texture edges for accurate depth boundaries. In this paper we propose an important update to EWOC, dividing it into smaller incremental upscaling steps. We predict two major improvements from this. Firstly, processing time should be decreased by dividing one big calculation into several smaller steps. Secondly, we assume an increase in quality for the upscaled depth map, due to a more coherent edge detection on the video frame. In our evaluations we can show the desired effect on processing time, cutting down the calculation time more than in half. We can also show an increase in visual quality, based on objective quality metrics, compared to the original implementation as well as competing proposals.
Starting Page	1
Ending Page	4
File Size	965875
Page Count	4
File Format	PDF
ISBN	9781467349048
ISSN	2161203X
e-ISBN	9781467349055
e-ISBN	9781467349031
DOI	10.1109/3DTV.2012.6365429
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-15
Publisher Place	Switzerland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Visualization PSNR Image edge detection EWOC 3DTV incremental Optimization DIBR optimization time-of-flight depth map Cameras view synthesis Sensors edge detection upscaling Spatial resolution
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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