scholarly journals The role of symmetry in 3D shape discrimination across changes in viewpoint

2012 ◽  
Vol 12 (9) ◽  
pp. 1048-1048 ◽  
Author(s):  
E. Egan ◽  
J. Todd ◽  
F. Phillips
Keyword(s):  
Shape Discrimination ◽  
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

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 Visual and haptic geometry of 3D shape discrimination

2015 ◽  
Vol 15 (12) ◽  
pp. 866 ◽  
Author(s):  
Flip Phillips ◽  
Emerson O'Donnell ◽  
Noah Kernis
Keyword(s):  
Shape Discrimination ◽  
3D Shape

scholarly journals Kanizsa shape discrimination and contour integration deficits in schizophrenia: What is the role of spatial frequency?

2013 ◽  
Vol 13 (9) ◽  
pp. 721-721
Author(s):  
T. Suhail-Sindhu ◽  
B. P. Keane ◽  
D. Paterno ◽  
G. Erlikhman ◽  
S. Kastner ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
Contour Integration ◽  
Shape Discrimination

scholarly journals Neural Correlates of Disparity-Defined Shape Discrimination in the Human Brain

2007 ◽  
Vol 97 (2) ◽  
pp. 1553-1565 ◽  
Author(s):  
Chandramouli Chandrasekaran ◽  
Victor Canon ◽  
Johannes C. Dahmen ◽  
Zoe Kourtzi ◽  
Andrew E. Welchman
Keyword(s):  
Binocular Disparity ◽  
3D Structure ◽  
Three Dimensional ◽  
Discrimination Performance ◽  
Cortical Activity ◽  
Shape Discrimination ◽  
3D Shape ◽  
Contour Segmentation ◽  
Early Visual Cortex ◽  
3D Shape Perception

Binocular disparity, the slight differences between the images registered by our two eyes, provides an important cue when estimating the three-dimensional (3D) structure of the complex environment we inhabit. Sensitivity to binocular disparity is evident at multiple levels of the visual hierarchy in the primate brain, from early visual cortex to parietal and temporal areas. However, the relationship between activity in these areas and key perceptual functions that exploit disparity information for 3D shape perception remains an important open question. Here we investigate the link between human cortical activity and the perception of disparity-defined shape, measuring fMRI responses concurrently with psychophysical shape judgments. We parametrically degraded the coherence of shapes by shuffling the spatial position of dots whose disparity defined the 3D structure and investigated the effect of this stimulus manipulation on both cortical activity and shape discrimination. We report significant relationships between shape coherence and fMRI response in both dorsal (V3, hMT+/V5) and ventral (LOC) visual areas that correspond to the observers' discrimination performance. In contrast to previous suggestions of a dichotomy of disparity-related processes in the ventral and dorsal streams, these findings are consistent with proposed interactions between these pathways that may mediate a continuum of processes important in perceiving 3D shape from coarse contour segmentation to fine curvature estimation.

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