The visual perception of three-dimensional shape from self-motion and object-motion

1994 ◽  
Vol 34 (18) ◽  
pp. 2331-2336 ◽  
Author(s):  
V. Cornilleau-Pérès ◽  
J. Droulez
Keyword(s):  
Visual Perception ◽  
Three Dimensional ◽  
Object Motion ◽  
Dimensional Shape ◽  
Self Motion ◽  
Three Dimensional Shape

scholarly journals On the Ambient Optic Array: James Gibson’s Insights About the Phenomenon of Chiaroscuro

i-Perception ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 204166952095209
Author(s):  
James T. Todd
Keyword(s):  
Visual Perception ◽  
Light Field ◽  
Three Dimensional ◽  
Shape From Shading ◽  
Ambient Light ◽  
The Past ◽  
Surface Materials ◽  
Dimensional Shape ◽  
Optic Array ◽  
Three Dimensional Shape

In 1966, James Gibson first presented his theory of the ambient optic array, and he proposed a new field of ecological optics that he hoped would advance our knowledge on this topic. This study will consider how his ideas have largely come to fruition over the past 50 years. It reviews the research on the visual perception of three-dimensional shape from shading, the effects of ambient light from surface interreflections on observers’ perceptions, the perception of the light field, and the perception of surface materials. Finally, it also considers Gibson’s impact on these developments.

scholarly journals Perception of three-dimensional shape from ego- and object-motion: Comparison between small- and large-field stimuli

1995 ◽  
Vol 35 (4) ◽  
pp. 453-462 ◽  
Author(s):  
T.M.H. Dijkstra ◽  
V. Cornilleau-Pérès ◽  
C.C.A.M. Gielen ◽  
J. Droulez
Keyword(s):  
Three Dimensional ◽  
Object Motion ◽  
Large Field ◽  
Dimensional Shape ◽  
Three Dimensional Shape

Four Dimensions of Diamond T: Combination Trade Marks of Colours And Shapes

2006 ◽  
Vol 37 (4) ◽  
pp. 583
Author(s):  
Michael McGowan
Keyword(s):  
Three Dimensional ◽  
Trade Mark ◽  
Fourth Dimension ◽  
Trade Marks ◽  
Four Dimensions ◽  
Trade Mark Law ◽  
Dimensional Shape ◽  
Three Dimensional Shape

This article examines the relatively new fields of colour and shape trade marks. It was initially feared by some academics that the new marks would encroach on the realms of patent and copyright.  However, the traditional requirements of trade mark law, such as functionality and descriptiveness, have meant that trade marks in colour and shape are extremely hard to acquire if they do not have factual distinctiveness. As colour and shape trade marks have no special restrictions, it is proposed that the combination trade mark theory and analysis from the Diamond T case should be used as a way to make them more accessible. The combination analysis can be easily applied because every product has a three dimensional shape and a fourth dimension of colour.

Acoustic Analysis of Detailed Three-Dimensional Shape of the Human Nasal Cavity and Paranasal Sinuses

2017 ◽  
Author(s):  
Tatsuya Kitamura ◽  
Hironori Takemoto ◽  
Hisanori Makinae ◽  
Tetsutaro Yamaguchi ◽  
Kotaro Maki
Keyword(s):  
Nasal Cavity ◽  
Paranasal Sinuses ◽  
Acoustic Analysis ◽  
Three Dimensional ◽  
Dimensional Shape ◽  
Three Dimensional Shape

scholarly journals The Effect of Material Properties on the Perceived Shape of Three-Dimensional Objects

i-Perception ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 204166952098231
Author(s):  
Masakazu Ohara ◽  
Juno Kim ◽  
Kowa Koida
Keyword(s):  
Material Properties ◽  
Regional Variation ◽  
Three Dimensional ◽  
Mean Square ◽  
Viewing Condition ◽  
Three Dimensional Objects ◽  
Transparent Objects ◽  
Dimensional Shape ◽  
Local Root ◽  
Three Dimensional Shape

Perceiving the shape of three-dimensional objects is essential for interacting with them in daily life. If objects are constructed from different materials, can the human visual system accurately estimate their three-dimensional shape? We varied the thickness, motion, opacity, and specularity of globally convex objects rendered in a photorealistic environment. These objects were presented under either dynamic or static viewing condition. Observers rated the overall convexity of these objects along the depth axis. Our results show that observers perceived solid transparent objects as flatter than the same objects rendered with opaque reflectance properties. Regional variation in local root-mean-square image contrast was shown to provide information that is predictive of perceived surface convexity.

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