ArticleJournal of vision2021
From boundaries to bumps: When closed (extremal) contours are critical.
Article in Journal of vision, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Article
- Orientation fields predict human perception of 3D shape from shading.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- High-level aftereffects reveal the role of statistical features in visual shape encoding.Current biology : CB · 2024Article
- Qualitative perception of 3D shape from patterns of luminance curvature.Journal of vision · 2023Article
- New Approaches to 3D Vision.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2023Article
- The many facets of shape.Journal of vision · 2022Review
- The Role of Specular Reflections and Illumination in the Perception of Thickness in Solid Transparent Objects.Frontiers in psychology · 2022Article
- Qualitative shape from shading.i-PerceptionArticle
Corrections and comments
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Invariants underlying shape inference are elusive: A variety of shapes can give rise to the same image, and a variety of images can be rendered from the same shape. The occluding contour is a rare exception: It has both image salience, in terms of isophotes, and surface meaning, in terms of surface normal. We relax the notion of occluding contour and, more accurately, the rim on the object that projects to it, to define closed extremal curves. This new shape descriptor is invariant over different renderings. It exists at the topological level, which guarantees an image-based counterpart. It surrounds bumps and dents, as well as common interior shape components, and formalizes the qualitative nature of bump perception. The invariants are biologically computable, unify shape inferences from shading and specular materials, and predict new phenomena in bump and dent perception. Most important, working at the topological level allows us to capture the elusive aspect of bump boundaries.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.