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The assumed light direction for perceiving shape from shading

Published: 09 August 2008 Publication History

Abstract

Recovering 3D shape from shading is an ill-posed problem that the visual system can solve only by making use of additional information such as the position of the light source. Previous research has shown that people tend to assume light is above and slightly to the left of the object [Sun and Perona 1998]. We present a study to investigate whether the visual system also assumes the angle between the light direction and the viewing direction. We conducted a shape perception experiment in which subjects estimated surface orientation on smooth, virtual 3D shapes displayed monocularly using local Lambertian shading without cast shadows. We varied the angle between the viewing direction and the light direction within a range +/- 66 deg (above/below), and subjects indicated local surface orientation by rotating a gauge figure to appear normal to the surface [Koenderink et al. 1992]. Observer settings were more accurate and precise when the light was positioned above rather than below the viewpoint. Additionally, errors were minimized when the angle between the light direction and the viewing direction was 20--30 deg. Measurements of surface slant and tilt error support this result. These findings confirm the light-from-above prior and provide evidence that the angle between the viewing direction and the light direction is assumed to be 20--30 deg above the viewpoint.

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cover image ACM Conferences
APGV '08: Proceedings of the 5th symposium on Applied perception in graphics and visualization
August 2008
209 pages
ISBN:9781595939814
DOI:10.1145/1394281
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 09 August 2008

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Author Tags

  1. Lambertian shading
  2. light-from-above
  3. shape perception
  4. shape-from-shading

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Overall Acceptance Rate 19 of 33 submissions, 58%

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Cited By

View all
  • (2022)Geo-MetricACM Transactions on Graphics10.1145/3550454.355547541:6(1-13)Online publication date: 30-Nov-2022
  • (2019)The Impact of Stereo Rendering on the Perception of Normal Mapped Geometry in Virtual RealityProceedings of the 25th ACM Symposium on Virtual Reality Software and Technology10.1145/3359996.3364811(1-2)Online publication date: 12-Nov-2019
  • (2018)Exploring the efficiency of image metric for assessing the visual quality of 3D mesh modelInternational Journal of Modeling, Simulation, and Scientific Computing10.1142/S1793962318500563(1850056)Online publication date: 18-Sep-2018
  • (2018)Visual Attention for Rendered 3D ShapesComputer Graphics Forum10.1111/cgf.1335337:2(191-203)Online publication date: 22-May-2018
  • (2017)Toward a Perceptually Uniform Parameter Space for Filter TransparencyACM Transactions on Applied Perception10.1145/302273214:2(1-21)Online publication date: 2-Jan-2017
  • (2017)Walking in Virtual RealityACM Transactions on Applied Perception10.1145/302273114:2(1-15)Online publication date: 2-Jan-2017
  • (2017)Using Mutual Information for Exploring Optimal Light Source PlacementsSmart Graphics10.1007/978-3-319-53838-9_13(155-166)Online publication date: 25-Mar-2017
  • (2016)A Survey of Perceptually Motivated 3D Visualization of Medical Image DataComputer Graphics Forum10.5555/3071534.307158735:3(501-525)Online publication date: 1-Jun-2016
  • (2016)Subjective and Objective Visual Quality Assessment of Textured 3D MeshesACM Transactions on Applied Perception10.1145/299629614:2(1-20)Online publication date: 22-Oct-2016
  • (2016)Image Quality under Chromatic ImpairmentsACM Transactions on Applied Perception10.1145/296490814:1(1-20)Online publication date: 24-Aug-2016
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