Atmospheric Correction for High-Resolution Shape from Shading on Mars. [PDF]
J Imaging, 2022 Digital Elevation Models (DEMs) of planet Mars are crucial for many remote sensing applications and for landing site characterization of rover missions.
Hess M +3 more
europepmc +4 more sources
Qualitative shape from shading. [PDF]
IperceptionWhen human observers are asked to describe the shape of a surface, they often identify an arrangement of surface features like bumps, dimples, ridges, or valleys.
Norman JF, Todd JT.
europepmc +4 more sources
Is the perception of 3D shape from shading based on assumed reflectance and illumination? [PDF]
Iperception, 2014 The research described in the present article was designed to compare three types of image shading: one generated with a Lambertian BRDF and homogeneous illumination such that image intensity was determined entirely by local surface orientation ...
Todd JT, Egan EJ, Phillips F.
europepmc +3 more sources
Perspective Shape-from-Shading Problem: A Unified Convergence Result for Several Non-Lambertian Models. [PDF]
J Imaging, 2022 Shape-from-Shading represents the problem of computing the three-dimensional shape of a surface given a single gray-value image of it as input. In a recent paper, we showed that the introduction of an attenuation factor in the brightness equations ...
Tozza S.
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The perception of shape from shading in a new light. [PDF]
PeerJ, 2014 How do humans see three-dimensional shape based on two-dimensional shading? Much research has assumed that a ‘light from above’ bias solves the ambiguity of shape from shading. Counter to the ‘light from above’ bias, studies of Bayesian priors have found
Proulx MJ.
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Three-dimensional shape from shading is modulated by top-down attention: Evidence from event-related potentials. [PDF]
IperceptionShading is an important monocular cue for three-dimensional (3D) perception, whereby 3D shape can be inferred from shading patterns across an object, in a process termed shape-from-shading .
Matthews JP, Mills DL, Sapir A.
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Coding of shape from shading in area V4 of the macaque monkey. [PDF]
BMC Neurosci, 2009 Background The shading of an object provides an important cue for recognition, especially for determining its 3D shape. However, neuronal mechanisms that allow the recovery of 3D shape from shading are poorly understood.
Arcizet F, Jouffrais C, Girard P.
europepmc +2 more sources
Three-dimensional shape cues affect human and artificial recognition systems differently. [PDF]
PLoS OneHumans and neural networks use shape and texture information differently. While humans weigh shape heavily in their ultimate classification decision, neural networks are more biased towards texture cues. Many tests of shape vs.
Cutler M +5 more
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3D Reconstruction of Gastrointestinal Regions Using Single-View Methods
IEEE Access, 2023 Capsule endoscopy is about to become an alternative to traditional colonoscopy. One uses a wireless camera to visualize the gastrointestinal (GI) tract. A 3D model based on image sequences obtained from wireless capsule endoscopy (WCE) can be helpful to ...
Bilal Ahmad +3 more
doaj +1 more source
Ascertaining the Ideality of Photometric Stereo Datasets under Unknown Lighting
Algorithms, 2023 The standard photometric stereo model makes several assumptions that are rarely verified in experimental datasets. In particular, the observed object should behave as a Lambertian reflector, and the light sources should be positioned at an infinite ...
Elisa Crabu +3 more
doaj +1 more source