Corpus ID: 18447191

The role of lines and corners of geometric figures in recognition performance.

@article{Shevelev2003TheRO,
  title={The role of lines and corners of geometric figures in recognition performance.},
  author={Igor A. Shevelev and V. M. Kamenkovich and George A. Sharaev},
  journal={Acta neurobiologiae experimentalis},
  year={2003},
  volume={63 4},
  pages={
          361-8
        }
}
A relative role of lines and corners of images of outline geometric figures in recognition performance was studied psychophysically. Probability of correct response to the shape of the whole figure (control) and figures with lines or corners masked to a different extent was compared. Increase in the extent of masking resulted in a drop of recognition performance that was significantly lower for figures without corners, than for figures without part of their lines. The whole 3D figures were… Expand
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Latency of recognition of geometrical figures with sides or corners masked to a different degree in humans
TLDR
It has been found that the latencies of recognition significantly and considerably increase if a greater part of a figure is masked, and for all levels of masking, the latency of recognition are longer for figures with partially masked corners rather than for those with partiallyMasked sides. Expand
Recognition of lateralized halftone and outline images of everyday objects in conditions of masking
TLDR
Recognition of the shapes of halftone and outline images of everyday objects in conditions of lateralized tachystoscopic presentation and different levels of noise masking by humans was studied and the neurophysiological mechanisms and functional significance of these effects are discussed. Expand
Identification of images as a series of gradual transformations of geometrical figures
In the course of psychophysiological experiments with a tachistiscopic presentation of geometrical figures as transformations from a square into a triangle, the subjects worked out a distance scale… Expand
The role of corner angle in visual physiology and brightness perception
TLDR
The psychophysical results show that corners appear quantifiably brighter for sharp than for shallow angles, and that the perceived brightness of the comer is linearly correlated to the corner's angle, suggesting that comers start to be processed from the very first stages of the visual system. Expand
Contour integration with corners
TLDR
It is shown that by inserting local corner elements at points of angular discontinuity, a jagged contour becomes as salient as a straight one. Expand
Superimposition of illusory patterns with contrast variations.
TLDR
The results obtained in experiments with dichoptic stimuli suggest that stimulus length distortions may occur in the monocular retinocortical pathways. Expand
Object perception and masking: Contributions of sides and convexities
TLDR
It is found that both side and convexity information contribute to masking, which supports a theory where convexities constitute a prime source of information for shape processing, and sides do also contribute but to a smaller extent. Expand
Location of the dipoles of the P1 wave of visual evoked potential in the human brain
Line fragments and their intersections are the basic properties of most objects in the visual world [3]; therefore, their rapid and reliable detection is important for image recognition. It is… Expand
A new angle on contour integration: The role of corners
Contour integration refers to the binding of disjoint local segments into contiguous global shapes. One central tenet in the study of contour integration has been the dependency of contour visibility… Expand
A biologically plausible model of human shape symmetry perception.
TLDR
With some improvement of edge recovery, the model can encode symmetry axes in natural images such as faces and model and human performances are comparable for symmetry perception of shapes. Expand
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References

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