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Perception of Perspective Distortions in Image-Based Rendering.

Peter Vangorp1, Christian Richardt, Emily A Cooper

  • 1REVES/INRIA Sophia-Antipolis ; University of Giessen ; MPI Informatik.

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Summary
This summary is machine-generated.

Image-based rendering (IBR) can cause visual distortions. Our study found distortions are less severe than predicted, leading to new guidelines for acceptable virtual views and camera density in IBR applications.

Keywords:
Image-based renderinghuman visionperception

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Area of Science:

  • Computer graphics
  • Vision science
  • Human-computer interaction

Background:

  • Image-based rendering (IBR) uses photographs to enhance simple geometries, creating realistic visuals.
  • Viewer movement from the correct viewpoint in IBR can lead to significant image distortions and misperceptions of scene geometry.
  • Existing vision science hypotheses offer conflicting views on whether viewers can compensate for IBR-induced distortions.

Purpose of the Study:

  • To investigate perceptual distortions in street-level IBR for façade viewing.
  • To test a modified vision science hypothesis extending to street-level IBR.
  • To develop a predictive model for IBR distortion acceptability and guide capture strategies.

Main Methods:

  • Conducted experiments to measure the magnitude of perceptual distortions in IBR for façade viewing.
  • Performed a rating experiment to assess the acceptability of observed distortions.
  • Developed a predictive model based on experimental results and validated it with a confirmatory study.

Main Results:

  • Viewer percepts in IBR are distorted, but less severely than predicted by the modified vision science hypothesis.
  • Experimental results from distortion measurement and acceptability ratings were consistent.
  • A predictive model for street-level IBR distortion was developed and validated.

Conclusions:

  • The study provides a refined understanding of perceptual distortions in street-level IBR.
  • Developed guidelines for acceptable virtual views and optimal camera capture density for IBR.
  • An application was created to guide users in IBR navigation, ensuring acceptable perceptual distortions.