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.

Shape-Reconstruction System for Three-Dimensional Objects Using an Ultrasonic Distance Sensor Mounted on a Manipulator

1989 ◽  
Vol 111 (2) ◽  
pp. 180-186 ◽  
Author(s):  
Takeshi Tsujimura ◽  
Tetsuro Yabuta ◽  
Takenori Morimitsu
Keyword(s):  
Three Dimensional ◽  
Shape Reconstruction ◽  
Measured Data ◽  
Three Dimensional Objects ◽  
Dimensional Shape ◽  
Distance Sensor ◽  
Position And Orientation ◽  
Dimensional Object ◽  
Three Dimensional Shape ◽  
Manipulator Control

This paper presents a three-dimensional shape-reconstruction system that employs an ultrasonic distance sensor placed on a manipulator. This system can not only reconstruct the shape of an object, but it can also precisely assess the distance from the manipulator to the object. By employing the freedom of the manipulator, the system can measure an object with the sensor in any position and orientation, and can then numerically reconstruct object images using measured data. Experimental results show that the newly developed system and method make object shape reconstruction easy and inexpensive. They also show that the three-dimensional object data obtained by this method can be used in manipulator control.

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
Sign in / Sign up

Export Citation Format

Share Document