MultiHypothesis DisparityCompensated Light Field Compression - PowerPoint PPT Presentation

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MultiHypothesis DisparityCompensated Light Field Compression

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... University Computer Graphics Laboratory. Prashant Ramanathan. Light Field ... Conclusions and Future Work. Multi-hypothesis prediction reduces residual error ... – PowerPoint PPT presentation

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Title: MultiHypothesis DisparityCompensated Light Field Compression


1
Multi-HypothesisDisparity-CompensatedLight
Field Compression
  • Prashant Ramanathan
  • EE368B Final Project
  • December 6, 2000

2
Overview
  • Light fields
  • Light field compression
  • Multi-hypothesis techniques
  • Results

3
Light Fields I
  • Represents the appearance of a scene or object
    from all viewing positions and directions

Planar Light Field
University of Erlangen Computer Graphics Group
4
Light Fields II
  • Problems with light fields
  • Difficult to acquire
  • Very large

Buddha 200 MB uncompressed
Night 95 GB uncompressed
Stanford University Computer Graphics Laboratory
5
Light Field Compression
  • Disparity-compensation (Magnor, Girod 2000)

target image
reference images
reference images
6
Multiple Hypothesis
  • Specify reference views to use and independent
    disparity values

reference view 1
reference view 3
7
Experimental Data
  • Two sets of images from Flieger light field

target image
reference images
reference images
8
Experiments
  • Three schemes tested

STD one disparity
H1 one disparity reference index
H2 two disparities reference indices
9
Results I
  • 4x4 blocks

H2
H1
STD
10
Results II
  • 32x32 blocks

H2
H1
STD
11
Conclusions and Future Work
  • Multi-hypothesis prediction reduces residual
    error
  • Overall compression gain?
  • Theoretical analysis?
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