Method of detecting capability for three-dimensional sensing of flat images

FIELD: physics.

SUBSTANCE: method includes rendering an image which creates a depth and volume effect (IDE); detecting electrical activity (EEG) of the brain for white sheet (IWS) rendering and for image IDE rendering; calculating the sum of the overall coherence amplitude on all derivations and components of EEG rhythms, first for IWS rendering ( Σ ( C H А I W S ) ) , and then for image IDE rendering ( Σ ( C H А I D E ) ) . If the value Σ ( C H А I D E ) is greater than Σ ( C H А I W S ) by 1.8 times or more, the capability for three-dimensional sensing of flat images is determined.

EFFECT: method enables to obtain an objective evaluation of the capability for three-dimensional sensing of flat images, which is achieved owing to use of coherent EEG analysis.

2 dwg

 

The invention relates to physiology, psychopathologie, optics, neuroscience and can be used in the field of cognitive research to study the interaction of psychological and physiological levels of visual perception, in the field of education to identify creative abilities.

It is known that stereoscopic vision, binocular disparately are natural mechanisms of depth perception and scope of environmental objects [1]. Stereoscopic vision is receiving visual information from the two eyes, two points located at a distance of 6-8 cm from each other. Two observations lead to the fact that when getting into the field of view three-dimensional objects located at different distances from each other, on the retinal images of the eye are formed shifted images (binocular disparately). Believe that binocular disparately retinal images allows us to perceive items that people surround that uniquely position them relative to each other along the depth of the field of view. In that case, if the retinal images are formed two identical projections of any depth or volume should not occur. This variant occurs for remote 200-250 m (and more) of three-dimensional objects, for planar izabrani.

It is known that TREN is ng observations stereoscopic depth of stereograms in terms of their application develops the ability of three-dimensional perception of images on planar media [2-4]. The imposition of projections is carried out when the concentration of the view outside the plane of arrangement of stereograms, in front of her or behind her. An integral element of the training is to acquire the skill rapid transition of the perception of stereoscopic depth from one method of observation to another. There is a constant process of interaction mechanism of eye movements with different state of perception vector depth of stereograms. In the invention [2, 3] fixed physical and technical contradictions. This is the need for three-dimensional perception using two stereoscopic projection and application of any of the terms of overlapping projections, or other technical devices, the guide to the right and left eye stereoscopic projection. In the final stage of the training on one planar projection of the observed effects of spatial perspective images [3].

Known subjective method to determine the ability of three-dimensional perception of planar images [5]. During its implementation are mounted multiple stereo pairs with offset of the individual images on the distance from 0 to 6, see Stereo pairs are presented to a subject who chooses the projection that most closely fits the sense of depth perception on a single projection.

It is known that eye movements in the perception of images is used to objectively is the method of detecting the ability of three-dimensional perception of planar images [6]. The subject are planar image stereograms, 3D raster image. On the binocular eye tracker during exposure to a stimulus material is logged towards concentration sight right (Ra) and left (Le) eyes, determined by X-coordinates, we calculate the difference ∆X=XLe-XRa. The ability of three-dimensional perception planar image is detected from the condition, when you register the condition ∆X≠0. Comparison of the obtained parameters of the activity of the eye under the observation of stereoscopic depth stereograms, depth raster 3D images with similar characteristics in the perception of depth plane image shows that they are subject to the General laws and at least one level of magnitude. Technical support registration on the binocular eye tracker is from 1 to 5 million rubles. This is the method chosen by the prototype.

Object of the invention is the extension of objective methods for the registration of the ability of three-dimensional perception of plane images, the reduction of measurement.

This object is achieved by registration of the electrical activity (EEG) of the brain, on the presentation of a white sheet (AndNLand on the presentation of images with effects of depth perception (AndEH) calculate the total amount ampli the UDA coherence in all leads and components of EEG rhythms, first, on the presentation ofAndBL(Σ(KGAndAndBL))then on the presentation AndEHimage(Σ(KGAndAndEG))and when the value ofΣ(KGAndAndEG)moreΣ(KGAndAndBL)1.8 or more times by determining the ability of three-dimensional perception of planar images.

Figure 1, figure 2 illustrate the principle of the method. Figure 1 shows the photo image of stone tiles AndEH"that creates the effects of depth perception of black and white shades. Figure 2 shows the values of the sum of the full amplitude when perceived the party of the white sheet - "AndNL" and images with the effects of depth AndEH". The amount of amplitude coherence pending on the vertical scale. The terms of the perception of a white sheet and images AndEH" is placed on the horizontal scale. Numbers"1", "2", "3", "4" the indicated readings of the four subjects.

The audit was conducted for the four subjects. The efficiency of image figure 1 was tested for binocular eye tracker during the registration motor control of eye movements. Were the values obtained Δ=XR-XL≠0, confirming the ability of depth perception image 1 test of 1. The remaining numbers indicate the subjects who underwent semester course on the methodology of developing the ability of depth perception planar images. Subjective testing method on the stereograms in the process of fusion of stereotactic showed that they are able to perceive the depth of the image plane of the image, including photographic images of stone tiles 1.

The principle of the method the following. On the head of the subjects are fixed sensors readings EEG rhythms. They come in the EEG analyzer. He must be equipped with software that allows you to select the Delta, theta, alpha, beta rhythms to calculate the full amplitude of the coherence of all rhythms. First, the subject prex is yavlyaetsya white sheet of paper and registration of the EEG. Next is presented the image "IUE" and re-registration of EEG. Then software methods are amplitude value of coherence for each lead and for all components of the EEG. For the image of a white sheet image "IUE" readings fold amplitude in all leads and all rhythms. Thus there are two integral values of amplitude characterizing the depth perception of the image "IUE" -(KgAndAndEG)and a white sheet(KgAndAndBL). In that case, if the values of the sum of(KgAndAndEG)more indications(KgAndAndBL)then ledue is to say, this subject has the ability of depth perception on a planar image.

We will show the application of the method for the four subjects and registration of EEG rhythms in eight leads. The EEG registration was carried out using computer electroencephalograph Neuron-Spectrum-1 firm "Neurosoft" (Russia) (the bandwidth of amplifiers 0.5-35 Hz) monopolar 8 symmetrical leads right and left brain: occipital (O1, O2), temporal (T3, T4), Central (C3, C4), frontal (F1, F2), located on the international circuit 10-20. After a five-minute adaptation period to the experimental setting were recorded background electrical activity of the brain open eyes when fixing the gaze on a planar white sheet image. Image size 40×30 cm was installed at a distance of ~1.5 m from the subject. The task of subjects was to ensure conditions for a three-dimensional image perception "IUE". On the three-dimensional perception was assessed in earlier tests, and subjective feelings of the subjects.

Primary data recording EEG was processed using the standard software package "Neuron-.NET". Studied the spatial and amplitude-frequency characteristics of cortical electrical activity. The selected individual segments of EEG epoch analysis), for 10 seconds each, deprived artefa the tov, processed by spectral analysis in the field of 3-30 Hz using the algorithm of the fast Fourier transform in the program BrainLoc. Were evaluated by the following criteria EEG power and the maximum frequency of the main ranges of the EEG (Delta, theta, alpha, beta); revealed the spatial-temporal characteristics of brain activity.

The amplitude of the coherence was calculated for the following pairs of leads F1-C3; C3-O1; F2-C4; C4-O2; F1-T3; T3-O1; F2-T4 and T4-O2. When the perception of a white sheet, the greatest value of the sum of the amplitudes of 805 µv/Hz obtained test "1". The values of the pairs of lead ranged from 95 to 106 µv/Hz. Depth perception image "IUE" increases the value of the sum of the amplitudes of more than 2 times, before 1639 µv/Hz.

The subjects of "2" and "3" in terms of the perception of the white sheet of the registered values of the amplitude coherence 714 and 662 µv/Hz. When the depth perception of the image "IUE" there was an increase in amplitude up to 1305 and 1221 µv/Hz. Therefore, indications of the amplitude increase 1.8 times. When the perception of a white sheet smallest value identified for the Respondent "4" - 290 µv/Hz. For this Respondent registered the highest magnification of amplitude coherence in terms of the viewing image "IUE". He reaches values of 4.6, or level of the amplitude of the coherence - 1344 MK is/Hz.

The above example shows that the ability of depth perception and volume can be revealed by the results of registration of EEG and the calculation of the full amplitude coherence. Therefore, it is permissible to conclude that the perception of depth plane image leads to increased coherence of EEG parameters. Cost apparatus for carrying out the registration of EEG rhythms in tens times less than the cost of binocular eye tracker.

Surveys of approximately 1,000 age senior high school students show that up to 90% of them already have the ability to take some pictures with effects relief, including such distant objects, as the cloud cover.

The ability of three-dimensional perception planar image allows you to watch any flat image as three-dimensional scene, to regulate the depth of the individual images. There are conditions conversion of previously flat perception in a dynamically changing the depth of the three-dimensional distribution, especially on the color palette, or multiple solution depth perception and volume previously planar image. In the "format" of a metatheory psychologist U. Neisser and generalized cognitive schemes of the way to seek, receive, information processing structured mechanisms of divergent thinking. The other is the capture, the proposed solution is to treat experimental technology to identify, not only the perception of the volume of the flat image, but also elements of divergent thinking, therefore, and creative abilities.

On the one hand, the development of the ability to perceive the planar image with depth and volume can lead to the improvement of the technical means, using the principles of visual perception. On the other hand, registration of eye movements on the binocular eye tracker in terms of three-dimensional perception of planar images revealed and negative sides. This appearance of non-stationary conditions of the eye movement. The instability of perception can lead to increased time making decisions when use cases of plane images in critical conditions. The negative side is called the necessity of finding a significant reduction in hardware costs to identify the ability of three-dimensional perception of planar images. This is the approach proposed in this application.

The invention relates to physiology, psychopathologie, optics, neuroscience and can be used in the field of cognitive research to study the interaction of psychological and physiological levels of visual perception, in the field of education on what I identify creative abilities.

Literature

1. Hubel D. Eye, brain, vision: TRANS. with ang. - M.: Mir, 1990. - 239 S.

2. Pat. 2264299 EN. Method of forming three-dimensional images (options) / V.N. Antipov. - Publ. 20.11.05; bull. No. 32.

3. Pat. RU # 2391948. The way of the development of stereoscopic vision / V.N. Antipov, ALEXANDER Antipov. - Publ. 20.06.2010. - Bul.

4. Antipov, VN, Baltina T.V., Yakushev R.S., ALEXANDER Antipov Cognitive control of visual perception of modern man as an object of study Bioecology // scientific notes of Kazakh state University. A series of natural. science. - 2008. - T, kN. - C-151.

5. Pat. 2321034 EN. The method of determining the degree of adaptation of the human visual system / V. Antipov. and other - Publ. 27.03.2008. - Bull. No. 9.

6. Antipov, VN, Vakhrameeva O.A., Kalimullin DZ, Zhegallo AV, Hrusov A.K., Shelepin J.E. Experimental study of 3D perception of the images of plane images // "Experimental method in the structure of psychological knowledge / Resp. Ed. VA Drummers. - M.: Publishing house of the Institute of psychology of Russian Academy of Sciences, 2012. - S-194

The way to determine the ability of three-dimensional perception of plane images, including the presentation of the image, creating the illusion of depth and volume (AndEH), characterized in that record electrical activity (EEG) of the brain on the presentation of a white sheet (AndNLand on the presentation of the image AndEHcalculate the sum of the full amplit the water coherence in all leads and components of the EEG rhythms first to assert And NL(Σ(KGAndAndBL))then on the presentation AndEHimage(Σ(KGAndAndEG))and when the value ofΣ(KGAndAndEG)moreΣ(KGAndAndBL)1.8 or more times to determine the ability of three-dimensional perception of planar images.



 

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