A detection method of brightness-modulated moving sinusoidal grating perception ability

A technology of perceptual ability and sinusoidal grating, applied in the field of visual inspection, can solve the problems of low perceptual ability and high perceptual ability of motion information, and achieve the effect of reducing the difficulty of identification, improving the contrast of grating, and having strong practicability.

Active Publication Date: 2020-05-22
科飞云视(天津)高新科技有限公司
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AI Technical Summary

Problems solved by technology

In general, the visual system of minors has a relatively low ability to perceive motion information, while the visual system of adults has a relatively high ability to perceive motion information

Method used

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  • A detection method of brightness-modulated moving sinusoidal grating perception ability
  • A detection method of brightness-modulated moving sinusoidal grating perception ability

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Embodiment Construction

[0020] refer to figure 1 , a method for detecting the perception ability of a brightness-modulated motion sinusoidal grating proposed by the present invention, comprising:

[0021] Step S1, constructing a grating motion function based on the average grating brightness, grating contrast, grating spatial frequency, grating motion speed and direction, grating orientation, and grating phase, specifically including:

[0022] Grating motion function: l(x, y)=L mean ×{1+C×sin{2π[f(ycosθ-xsinθ)+ωt]+Φ}},

[0023] Among them, L mean is the average brightness of the grating, C is the contrast of the grating, f is the spatial frequency of the grating, ω is the moving direction of the grating, θ is the azimuth of the grating, and Ф is the phase of the grating.

[0024] Step S2, when the average brightness of the grating, the spatial frequency of the grating, the azimuth of the grating, and the moving speed of the grating take preset values, the phase of the grating takes the first value...

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Abstract

The invention discloses a method for detecting the perception capacity of a motion sinusoidal grating for brightness modulation. The method includes the steps that a grating motion function is established based on the grating average brightness, the grating contrast,, the grating space frequency, the grating motion speed and direction, the grating azimuth and the grating phase; a first value is taken as the grating phase, A or B is taken as the grating motion direction, under the condition that other values are fixed values, the grating contrast Cz is taken and substituted into the grating motion function, and a grating motion graph is obtained; the grating motion graph is displayed to a testee; when the grating motion direction input by the testee and the grating motion direction of the grating motion graph are identical, Cz=Cz*(1-R) is substituted into the grating motion function till the input grating motion direction and the grating motion direction of the grating motion graph aredifferent, and a target grating motion graph is output; or else, Cz=Cz*(1+R) is substituted into the grating motion function till the input grating motion direction and the grating motion direction ofthe grating motion graph are identical, and the grating motion graph is output; the perception capacity of the testee is acquired according to the grating contrast of the grating motion graph.

Description

technical field [0001] The invention relates to the technical field of visual inspection, in particular to a method for detecting perception ability of a brightness-modulated moving sinusoidal grating. Background technique [0002] The perception ability of the visual system of different human individuals to motion information is not completely the same. In general, the perception ability of the visual system of minors to motion information is relatively low, while the perception ability of the visual system of adults is relatively high. [0003] Motion sinusoidal gratings are a simple motion stimulus that can be used to examine the ability of different visual systems to perceive motion information. Contents of the invention [0004] Based on the technical problems existing in the background technology, the present invention proposes a method for detecting the perception ability of a brightness-modulated moving sinusoidal grating; [0005] A method for detecting the perc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/02
CPCA61B3/02
Inventor 汤勇
Owner 科飞云视(天津)高新科技有限公司
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