scholarly journals Investigating shape perception by classification images

2014 ◽  
Vol 14 (12) ◽  
pp. 24-24 ◽  
Author(s):  
I. Kurki ◽  
J. Saarinen ◽  
A. Hyvarinen
Keyword(s):  
Shape Perception ◽  
Classification Images

scholarly journals Using classification images to reveal the critical features in global shape perception

2010 ◽  
Vol 10 (7) ◽  
pp. 1174-1174
Author(s):  
I. Kurki ◽  
A. Hyvarinen ◽  
J. Saarinen
Keyword(s):  
Shape Perception ◽  
Global Shape ◽  
Classification Images

Modifying Perceived Size of a Handled Object through Hand Image Deformation

2013 ◽  
Vol 22 (3) ◽  
pp. 255-270 ◽  
Author(s):  
Yuki Ban ◽  
Takuji Narumi ◽  
Tomohiro Tanikawa ◽  
Michitaka Hirose
Keyword(s):  
Visual Representation ◽  
Shape Perception ◽  
Size Perception ◽  
Visual Object ◽  
Display System ◽  
Haptic Interaction ◽  
Image Deformation ◽  
Virtual Objects ◽  
The Difference ◽  
Hand Image

In this study, we aim to construct a perception-based shape display system to provide users with the sensation of touching virtual objects of varying shapes using only a simple mechanism. Thus far, we have proved that identified curved surface shapes or edge angles can be modified by displacing the visual representation of the user's hand. However, using this method, we cannot emulate multifinger touch, because of spatial unconformity. To solve this problem, we focus on modifying the identification of shapes using two fingers by deforming the visual representation of the user's hand. We devised a video see-through system that enables us to change the perceived shape of an object that a user is touching visually. The visual representation of the user's hand is deformed as if the user were handling a visual object; however, the user is actually handling an object of a different shape. Using this system, we conducted two experiments to investigate the effects of visuo-haptic interaction and evaluate its effectiveness. One is an investigation on the modification of size perception to confirm that the fingers did not stroke the shape but only touched it statically. The other is an investigation on the modification of shape perception for confirming that the fingers dynamically stroked the surface of the shape. The results of these experiments show that the perceived sizes of objects handled using a thumb and other finger(s) could be modified if the difference between the size of physical and visual stimuli was in the −40% to 35% range. In addition, we found that the algorithm can create an effect of shape perception modification when users stroke the shape with multiple fingers.

Body Shape Perception and its Disturbance in Anorexia Nervosa

1984 ◽  
Vol 144 (2) ◽  
pp. 167-171 ◽  
Author(s):  
S. W. Touyz ◽  
P. J. V. Beumont ◽  
J. K. Collins ◽  
M. McCabe ◽  
J. Jupp
Keyword(s):  
Anorexia Nervosa ◽  
Body Shape ◽  
Shape Perception ◽  
Video Monitor ◽  
Normal Body ◽  
Female Patients

SummaryThe perception of body shape was studied in 15 female patients with anorexia nervosa and 15 age matched controls. A lens was used which could be manipulated to cause a horizontal distortion of an image projected onto a video monitor. The patients showed a greater tendency to over- and under-estimate their present body shape than did the controls. Further, the patients' desired body shape was significantly thinner than that of controls, as was their estimation of what constitutes a normal body shape. These findings are discussed in relation to the literature and it is suggested that they may have important implications for treatment.

scholarly journals Classification images measured in a same/different face discrimination task

2010 ◽  
Vol 8 (6) ◽  
pp. 893-893
Author(s):  
P. Bennett ◽  
M. Pachai ◽  
A. Sekuler
Keyword(s):  
Discrimination Task ◽  
Classification Images
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