Effect of defocus on blur thresholds and thresholds of perceived change in blur: comparison of source and observer methods

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Title

Effect of defocus on blur thresholds and thresholds of perceived change in blur: comparison of source and observer methods

Content partner

The University of Auckland Library

Collection

ResearchSpace@Auckland

Description

The defocus levels required for normal observers to notice the first perceptible blur of a clear test target (blur threshold) and the least perceptible change in the degree of blurriness of an already blurry target (threshold of perceived change in blur) were measured using both the source and observer methods. In the source method observers viewed defocused stimuli presented on a projection screen, whereas in the observer method focused stimuli were presented to observers who were defocused ...

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Format

Research paper

Research format

Journal article

Date created

1989

Creator

Jacobs, Robert / Smith, G / Chan, CD

URL

http://hdl.handle.net/2292/20380

Related subjects

Adult / Equipment Design / Form Perception / Humans / Sensory Thresholds / Vision Tests / Visual Perception

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