CN108742499B - Detection method of sinusoidal grating perception capability based on brightness modulation - Google Patents

Detection method of sinusoidal grating perception capability based on brightness modulation Download PDF

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CN108742499B
CN108742499B CN201810246176.3A CN201810246176A CN108742499B CN 108742499 B CN108742499 B CN 108742499B CN 201810246176 A CN201810246176 A CN 201810246176A CN 108742499 B CN108742499 B CN 108742499B
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raster
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CN108742499A (en
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汤勇
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Kefei Yunshi Tianjin High Tech Co ltd
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Abstract

The invention discloses a detection method of sinusoidal grating perception capability based on brightness modulation, which comprises the following steps: s1, constructing a grating stimulation function based on the average grating brightness, the grating contrast, the grating spatial frequency, the grating orientation and the grating phase; s2, when the average brightness, spatial frequency and phase of the grating are preset values and the orientation of the grating is A or B, the contrast C of the grating is taken1Substituting the function to obtain a grating stimulation graph; s3, displaying the grating stimulus diagram to the testee, and receiving the input predicted grating direction of the testee; s4, when the predicted raster orientation is the same as the raster orientation of the raster stimulus pattern, let C1＝C1× (1-R) executing S2 until the predicted raster orientation is different from the raster orientation of the raster stimulus pattern, outputting the raster stimulus pattern, otherwise, let C1＝C1× (1+ R) executing S2 until the predicted grating orientation is the same as the grating orientation of the target grating stimulus image, outputting the target grating stimulus image, and S5 outputting the grating contrast of the grating stimulus image to obtain the grating perception capability of the tested person.

Description

Detection method of sinusoidal grating perception capability based on brightness modulation
Technical Field
The invention relates to the technical field of visual detection, in particular to a detection method of sinusoidal grating perception capability based on brightness modulation.
Background
A sinusoidal grating is a special type of grating, which consists of a carrier and a modulation signal together. The carrier may be in the form of a blank or random noise, etc., and the modulation signal is a sinusoidal grating. The application of raster stimulation to cortical visual function testing is different from letter identification such as the E-word on the eye chart. The former relies more on spatial frequency and contrast information contained in the stimulus, while the latter relies on spatial structure information in the stimulus.
Human individuals have varying abilities to perceive sinusoidal raster stimuli. In general, the smaller the sinusoidal grating contrast, the more difficult it is for a person to recognize and perceive the sinusoidal grating. Therefore, the human individual can be tested for sinusoidal grating perceptibility by varying the sinusoidal grating contrast.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a detection method of sinusoidal grating perception capability based on brightness modulation;
the invention provides a detection method of sinusoidal grating perception capability based on brightness modulation, which comprises the following steps:
s1, constructing a grating stimulation function based on the average grating brightness, the grating contrast, the grating spatial frequency, the grating orientation and the grating phase;
s2, taking a value C in the range of grating contrast ratio under the conditions that the average grating brightness and the spatial grating frequency are preset, the grating phase is the first value, and the grating azimuth is A or B1Substituting the target grating stimulus image into a grating stimulus function to obtain a target grating stimulus image;
s3, displaying a target grating stimulus diagram to the testee, and receiving a predicted grating direction input by the testee;
s4, when the predicted raster orientation input by the testee is the same as the raster orientation of the target raster stimulus diagram, let C1＝C1× (1-R) executing step S2 until the predicted raster orientation inputted by the testee is different from the raster orientation of the target raster stimulus diagram, otherwise, let C1＝C1× (1+ R) executing step S2, until the predicted raster orientation inputted by the testee is the same as the raster orientation of the target raster stimulus diagram, outputting the target raster stimulus diagram, wherein R is a ratio constant;
and S5, outputting the grating contrast of the target grating stimulus pattern, wherein the grating contrast of the target grating stimulus pattern is the grating perception capability of the testee.
Preferably, step S1 specifically includes:
grating stimulus functionl(x，y)＝Lmean×{1+C×sin{2π[f(ycosθ-xsinθ)]+ Φ }, wherein, LmeanIs the grating average brightness, C is the grating contrast, f is the grating spatial frequency, theta is the grating azimuth, and phi is the grating phase.
Preferably, in step S2, when A is 0, B is pi/2; when A is pi/4, B is 3 pi/4.
Preferably, in step S2, the first value ranges from 0 to 2 pi.
Preferably, the first value takes any one of values of 0 to 2 pi each time step S2 is performed.
The invention shows grating stimulus diagrams with different grating contrasts and different directions to a testee, the testee identifies the grating direction in the grating stimulus diagrams, when the direction identification of the testee is correct, the grating contrast of the grating stimulus diagrams is reduced, the identification difficulty of the testee is increased, and the grating stimulus diagrams are output until the testee cannot identify the grating stimulus diagrams; when the orientation of the tested person is incorrectly identified, the grating contrast of the grating stimulus diagram is improved, the identification difficulty of the tested person is reduced, the grating stimulus diagram is output until the tested person is correctly identified, and the grating perception capability corresponding to the grating stimulus diagram is obtained, so that the grating perception capability test of the tested person is completed.
Drawings
Fig. 1 is a schematic flow chart of a detection method for sensing capability of a sinusoidal grating based on brightness modulation according to the present invention;
FIG. 2 is a graph of grating stimulus for different grating contrasts in a grating stimulus function of the present invention;
FIG. 3 is a graph of the grating stimulus for a grating orientation of π/2 in the grating stimulus function of the present invention;
FIG. 4 is a graph of grating stimulus for a grating orientation of 0 in the grating stimulus function of the present invention;
FIG. 5 is a graph of the grating stimulus for a grating orientation of π/4 in the grating stimulus function of the present invention;
FIG. 6 is a graph of the grating stimulus for a grating orientation of 3 π/4 in the grating stimulus function of the present invention;
fig. 7 is a graph of grating stimulation for different grating phases in a grating stimulation function according to the present invention.
Detailed Description
Referring to fig. 1, the method for detecting the sensing capability of a sinusoidal grating based on brightness modulation provided by the invention comprises the following steps:
step S1, constructing a grating stimulation function based on the grating average brightness, the grating contrast, the grating spatial frequency, the grating orientation, and the grating phase, specifically including:
grating stimulation function l (x, y) Lmean×{1+C×sin{2π[f(ycosθ-xsinθ)]+ Φ }, wherein, LmeanIs the grating average brightness, C is the grating contrast, f is the grating spatial frequency, theta is the grating azimuth, and phi is the grating phase.
Step S2, taking a value C in the range of grating contrast ratio under the condition that the average grating brightness and the spatial grating frequency are preset values, the grating phase is the first value, and the grating azimuth is A or B1Substituting the target grating stimulus image into a grating stimulus function to obtain a target grating stimulus image, wherein when A is 0, B is pi/2; and when A is pi/4, B is 3 pi/4, the value range of the first value is 0 to 2 pi, and the first value takes any value from 0 to 2 pi when the step S2 is executed each time.
Referring to fig. 2, 3, 4, 5, 6, 7, in a specific embodiment LmeanThe actual measurement time can be (0.0-500.0 cd/m) for the average brightness of the grating2) And optionally adjusting. But the adjustment needs to be completed before the measurement, and the adjustment cannot be performed again in the whole measurement process after the adjustment; f is the grating spatial frequency, and a value is usually determined. After the determination, f can not be changed in the whole measuring process, and after one measurement is finished, the value can be adjusted to be a new value before the next measurement is carried out.
As shown in fig. 2, the grating contrast C gradually decreases from left to right, and the smaller C, the greater the difficulty level corresponding to the measurement; the larger C, the smaller the difficulty level corresponding to the measurement.
Referring to fig. 3 to 6, during the test, θ usually selects two values (e.g., 0 and pi/2, pi/4 and 3 pi/4), and θ included in the target raster stimulus pattern for each occurrence is randomly selected from the two values, so that the user needs to determine which value θ included in the target raster stimulus pattern is.
As shown in fig. 7, Φ is a grating phase, and may randomly change within a range during a test, so as to increase the difficulty of determining the grating orientation of a subject.
And step S3, displaying the target grating stimulus diagram to the testee, and receiving the predicted grating orientation input by the testee.
Step S4, when the predicted raster orientation inputted by the testee is the same as the raster orientation of the target raster stimulus diagram, let C1＝C1× (1-R) executing step S2 until the predicted raster orientation inputted by the testee is different from the raster orientation of the target raster stimulus diagram, otherwise, let C1＝C1× (1+ R) executing step S2, until the predicted raster orientation inputted by the testee is the same as the raster orientation of the target raster stimulus diagram, outputting the target raster stimulus diagram, wherein R is a ratio constant, and the value range of R is (0, 1.0).
And step S5, outputting the grating contrast of the target grating stimulus image, wherein the grating contrast of the target grating stimulus image is the grating perception capability of the testee.
In a specific scheme, the contrast of the grating is displayed to a tested person as C1When the predicted grating direction input by the testee is the same as the grating direction of the target grating stimulus diagram, the grating contrast of the grating stimulus diagram is reduced, the recognition difficulty of the testee is increased, and the grating stimulus diagram is output until the testee cannot recognize the target grating stimulus diagram; when the orientation identification of the testee is incorrect, the grating contrast of the grating stimulus diagram is improved, the identification difficulty of the testee is reduced, and the grating stimulus diagram is output until the testee identifies correctly, wherein R is a ratio constant and is used for controlling the test precision, and the smaller R is, the higher the test precision is.
And outputting the grating contrast of the target grating stimulus image, wherein the grating contrast of the target grating stimulus image is the grating perception capability of the tested person, thereby completing the perception capability test of the tested person.
In the embodiment, the grating stimulus diagrams with different grating contrasts and different directions are displayed to the testee, the testee identifies the grating directions in the grating stimulus diagrams, when the direction identification of the testee is correct, the grating contrast of the grating stimulus diagrams is reduced, the identification difficulty of the testee is increased, and the grating stimulus diagrams are output until the testee cannot identify the grating stimulus diagrams; when the orientation of the tested person is incorrectly identified, the grating contrast of the grating stimulus diagram is improved, the identification difficulty of the tested person is reduced, the grating stimulus diagram is output until the tested person is correctly identified, and the grating perception capability corresponding to the grating stimulus diagram is obtained, so that the grating perception capability test of the tested person is completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (4)

1. A detection method of sinusoidal grating perception capability based on brightness modulation is characterized by comprising the following steps:
s1, constructing a grating stimulation function based on the average grating brightness, the grating contrast, the grating spatial frequency, the grating orientation and the grating phase;
s2, taking a value C in the range of grating contrast ratio under the conditions that the average grating brightness and the spatial grating frequency are preset, the grating phase is the first value, and the grating azimuth is A or B1Substituting the target grating stimulus image into a grating stimulus function to obtain a target grating stimulus image;
s3, displaying a target grating stimulus diagram to the testee, and receiving a predicted grating direction input by the testee;
s4, when the predicted raster orientation input by the testee is the same as the raster orientation of the target raster stimulus diagram, let C1＝C1× (1-R) executing step S2 until the predicted raster orientation inputted by the testee is different from the raster orientation of the target raster stimulus diagram, otherwise, let C1＝C1× (1+ R) executing step S2, until the predicted raster orientation inputted by the testee is the same as the raster orientation of the target raster stimulus diagram, outputting the target raster stimulus diagram, wherein R is a ratio constant;
s5, outputting the grating contrast of the target grating stimulus image, wherein the grating contrast of the target grating stimulus image is the grating perception capability of the testee;
step S1, specifically including:
grating stimulation function l (x, y) Lmean×{1+C×sin{2π[f(ycosθ-xsinθ)]+ Φ }, wherein, LmeanIs the grating average brightness, C is the grating contrast, f is the grating spatial frequency, theta is the grating azimuth, and phi is the grating phase.
2. The method for detecting the perceptibility of a sinusoidal grating based on brightness modulation according to claim 1, wherein in step S2, when a is 0, B is pi/2; when A is pi/4, B is 3 pi/4.
3. The method for detecting perceptual capability of a sinusoidal grating based on brightness modulation as claimed in claim 1, wherein in step S2, a value of the first value ranges from 0 to 2 pi.
4. The method for detecting perceptual capability of a sinusoidal grating based on luminance modulation as set forth in claim 3, wherein the first value takes any one of values of 0 to 2 pi each time step S2 is performed.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4541697A (en) * 1981-03-03 1985-09-17 Randwal Instrument Co., Inc. Ophthalmic testing devices
CN1758020A (en) * 2005-11-18 2006-04-12 北京航空航天大学 Stereo vision detection system based on adaptive sine streak projection
WO2011006095A1 (en) * 2009-07-09 2011-01-13 Nike International Ltd. Contrast sensitivity testing and/or training using circular contrast zones
CN103800183A (en) * 2012-11-14 2014-05-21 复旦大学附属眼耳鼻喉科医院 Myopia visual perception training system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7354155B2 (en) * 2002-10-29 2008-04-08 M&S Technologies, Inc. Astigmatic axis independent spatial frequency and contrast sensitivity target and method
US10448821B2 (en) * 2015-10-20 2019-10-22 Denise A. Valenti Method and device for detection and assessment of marijuana impairment
CN107550451B (en) * 2016-06-30 2021-12-28 中国科学院心理研究所 Method and system for natural and objective assessment of visual field function

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4541697A (en) * 1981-03-03 1985-09-17 Randwal Instrument Co., Inc. Ophthalmic testing devices
CN1758020A (en) * 2005-11-18 2006-04-12 北京航空航天大学 Stereo vision detection system based on adaptive sine streak projection
WO2011006095A1 (en) * 2009-07-09 2011-01-13 Nike International Ltd. Contrast sensitivity testing and/or training using circular contrast zones
CN103800183A (en) * 2012-11-14 2014-05-21 复旦大学附属眼耳鼻喉科医院 Myopia visual perception training system

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Contrast discrimination with sinusoidal gratings of different spatial frequency;C. M. Bird等;《Journal of the Optical Society of America A》;20020731;第19卷(第7期);第1267-1273页 *
Effects of luminance contrast and phase difference on motion assimilation for sinusoidal gratings;Yoshio Ohtani 等;《Vision Research》;19950831;第36卷(第16期);第2277-2286页 *
测量长期光辐射下人眼对比度敏感函数及模型;张志亚等;《电子科技》;20150815;第28卷(第8期);第167-170页 *

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