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Optimized Sealing Process and Real-Time Monitoring of Glass-to-Metal Seal Structures

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Published on: September 2, 2019

A masking analysis of glass pattern perception.

Chien-Chung Chen¹

¹Department of Psychology, National Taiwan University, Taipei, Taiwan. c3chen@ntu.edu.tw

Journal of Vision

|January 8, 2010

Summary

Detecting Glass patterns is harder when a similar pattern is present. Concentric and spiral maskers most effectively obscure concentric targets, while spiral maskers obscure radial targets.

Area of Science:

Visual perception
Computational neuroscience
Psychophysics

Background:

Glass patterns are visual stimuli composed of randomly distributed dot pairs (dipoles) with orientations dictated by geometric transformations.
Understanding how the human visual system perceives global structures from these local cues is crucial for visual science.

Purpose of the Study:

To investigate how the presence of a masking Glass pattern affects the detection threshold of a target Glass pattern.
To determine the influence of different global forms (concentric, radial, vertical, plaid, spiral) of maskers on target detection.

Main Methods:

Employed a two-alternative forced-choice (2AFC) paradigm to measure target dot density thresholds at 75% accuracy.
Presented a masker in both intervals, with a target Glass pattern randomly presented in one interval and a random dot pattern in the other.

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Cross-Modal Multivariate Pattern Analysis

Cross-Modal Multivariate Pattern Analysis

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Systematically varied masker Glass pattern types and densities to assess their masking effects on concentric and radial targets.

Main Results:

Target detection thresholds remained constant at low masker densities but increased with higher masker densities for all masker types.
Concentric and spiral maskers exhibited the strongest masking effects on concentric targets.
A low-curvature spiral masker was most effective in masking radial targets.

Conclusions:

The perception of global structure in Glass patterns is significantly influenced by the presence and type of masker patterns.
The findings support a divisive inhibition model, where visual system responses are modulated by excitatory and inhibitory inputs.
Specific masker configurations, like concentric and spiral patterns, demonstrate potent interference with the perception of corresponding target structures.