scholarly journals The role of smooth occlusions in the perception of 3D shape from shading

2013 ◽  
Vol 13 (9) ◽  
pp. 260-260
Author(s):  
E. Egan ◽  
J. T. Todd
Keyword(s):  
Shape From Shading ◽  
3D Shape

scholarly journals The darker-is-deeper heuristic for the perception of 3D shape from shading: Is it perceptually or ecologically valid?

2015 ◽  
Vol 15 (15) ◽  
pp. 2 ◽  
Author(s):  
James T. Todd ◽  
Eric J. L. Egan ◽  
Christopher S. Kallie
Keyword(s):  
Shape From Shading ◽  
3D Shape

scholarly journals The effects of illumination on the perception of 3D shape from shading

2016 ◽  
Vol 16 (12) ◽  
pp. 657
Author(s):  
Makaela Nartker ◽  
Christopher Kallie ◽  
James Todd
Keyword(s):  
Shape From Shading ◽  
3D Shape

3D shape and 2D surface textures of human faces: the role of “averages” in attractiveness and age

1999 ◽  
Vol 18 (1) ◽  
pp. 9-19 ◽  
Author(s):  
A.J O'Toole ◽  
T Price ◽  
T Vetter ◽  
J.C Bartlett ◽  
V Blanz
Keyword(s):  
Surface Textures ◽  
3D Shape ◽  
Human Faces

Does Face Recognition Rely on Encoding of 3-D Surface? Examining the Role of Shape-from-Shading and Shape-from-Stereo

Perception ◽  
10.1068/p3065 ◽  
2000 ◽  
Vol 29 (6) ◽  
pp. 729-743 ◽  
Author(s):  
Chang Hong Liu ◽  
Charles A Collin ◽  
Avi Chaudhuri
Keyword(s):  
Face Recognition ◽  
Shape From Shading ◽  
Minor Role ◽  
Weighted Function ◽  
Pattern Processing ◽  
Shape Processing ◽  
Face Stimuli ◽  
Shading Effects ◽  
A Minor

It is now well known that processing of shading information in face recognition is susceptible to bottom lighting and contrast reversal, an effect that may be due to a disruption of 3-D shape processing. The question then is whether the disruption can be rectified by other sources of 3-D information, such as shape-from-stereo. We examined this issue by comparing identification performance either with or without stereo information using top-lit and bottom-lit face stimuli in both photographic positive and negative conditions. The results show that none of the shading effects was reduced by the presence of stereo information. This finding supports the notion that shape-from-shading overrides shape-from-stereo in face perception. Although shape-from-stereo did produce some signs of facilitation for face identification, this effect was negligible. Together, our results support the view that 3-D shape processing plays only a minor role in face recognition. Our data are best accounted for by a weighted function of 2-D processing of shading pattern and 3-D processing of shapes, with a much greater weight assigned to 2-D pattern processing.

scholarly journals Role of 3D shape in contrast detection of luminance gratings

2010 ◽  
Vol 2 (7) ◽  
pp. 299-299
Author(s):  
J. Schlerf ◽  
F. Domini
Keyword(s):  
3D Shape ◽  
Contrast Detection

scholarly journals State-of-the Art Motion Estimation in the Context of 3D TV

2013 ◽  
pp. 148-173 ◽  
Author(s):  
Vania V. Estrela ◽  
A. M. Coelho
Keyword(s):  
Motion Estimation ◽  
Error Concealment ◽  
Extraction Methods ◽  
Image Sensors ◽  
Shape Information ◽  
Content Creation ◽  
3D Shape ◽  
3D Tv ◽  
Compression Coding

Progress in image sensors and computation power has fueled studies to improve acquisition, processing, and analysis of 3D streams along with 3D scenes/objects reconstruction. The role of motion compensation/motion estimation (MCME) in 3D TV from end-to-end user is investigated in this chapter. Motion vectors (MVs) are closely related to the concept of disparities, and they can help improving dynamic scene acquisition, content creation, 2D to 3D conversion, compression coding, decompression/decoding, scene rendering, error concealment, virtual/augmented reality handling, intelligent content retrieval, and displaying. Although there are different 3D shape extraction methods, this chapter focuses mostly on shape-from-motion (SfM) techniques due to their relevance to 3D TV. SfM extraction can restore 3D shape information from a single camera data.

scholarly journals 3D shape-from-shading relies on a light source prior that does not change with age

2020 ◽  
Vol 177 ◽  
pp. 88-96
Author(s):  
Beverley Pickard-Jones ◽  
Giovanni d'Avossa ◽  
Ayelet Sapir
Keyword(s):  
Light Source ◽  
Shape From Shading ◽  
3D Shape

scholarly journals Is the Perception of 3D Shape from Shading Based on Assumed Reflectance and Illumination?

i-Perception ◽  
10.1068/i0645 ◽  
2014 ◽  
Vol 5 (6) ◽  
pp. 497-514 ◽  
Author(s):  
James T. Todd ◽  
Eric J. L. Egan ◽  
Flip Phillips
Keyword(s):  
Shape From Shading ◽  
3D Shape
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