CN202928783U - Integrated test system for naked-eye 3D display image source and display device - Google Patents

Abstract

The utility model discloses an integrated test system and an integrated test method for a naked-eye 3D display image source and a naked-eye 3D display device. The system comprises a detection module modulated by bionic parameters, an optical system computer data processing module and a control module. The method comprises the steps of: bionic sampling, namely, sampling images output by the 3D display device by using a bionic detector; processing the acquired images, and calculating optical transfer function values and modulation transfer function curves, including the calculation of the image source feature points after being modulated by the depth distance of a three-dimensional space; and obtaining a restoration degree of the three-dimensional space and image quality objective test results through the variation trend of the MTF curves, and evaluating the space image characteristics of the naked-eye 3D technology. The integrated test system for the naked-eye 3D display image source and the display device has the beneficial effects that: since the biomimetic method, the optical transfer function values and the modulation transfer function curves are adopted, the effects of various naked-eye 3D display technologies can be analyzed thoroughly and comprehensively by adopting just one naked-eye 3D display test scheme; and the test method is reasonable.

Description

Bore hole 3D shows image source and display device integrated test system

Technical field

The present embodiment belongs to bore hole 3D and shows technical field of measurement and test, relates to bore hole 3D and shows image source and display device integrated test system.

Background technology

Bore hole 3D technology, making a general reference all mankind itself need not just can allow the people produce the technology of stereoscopic vision by other apparatuses, its principle is mainly to utilize specific display technique such as parallax obstacle, Multi-level display etc., arouses human body physiological Mechanism or psychological stereoscopic sensation hint, produces stereoscopic vision.Bore hole 3D shows does not need to wear the 3D effect that helps glasses just can obtain the stereo scene demonstration, and its convenient simple and direct characteristic obtains in fields such as military affairs simulation, vision simulation, oil geology, architectural design, medical biotechnology, Entertainments to use widely.High-quality bore hole 3D display technique because having potential market widely, is expected to become the substituent of at present a large amount of planes display technique, is the study hotspot of domestic and international a large amount of scientific research institution, company.

At present, multiple its imaging effect of bore hole 3D display technique is uneven, shows that about bore hole 3D technology and the standard of test are still immature both at home and abroad.The test main method that the bore hole 3D of present stage shows can be divided into subjective assessment and objective evaluation.Subjective assessment is that the audient by some carries out subjective judgement.This mental experiment inevitably is subject to the impact of vision own, psychological factor and the picture quality of test person, has the too shortcoming that can't overcome of " subjectivity ".The general Luminance Distribution analysis of adopting based on picture pick-up device of objective evaluation, its method is similar to the measurement that common 2D is shown, whether its result to having 3D display effect preferably, the 3D scene of whether having reduced really shortcoming cogency, and it makes very large adjustment to different bore hole 3D Display Realization Technology Needs to method of testing.Because the technology that realizes bore hole 3D is varied, as parallax obstacle technology, lens pillar technology, multilayer shadow casting technique etc.Existing objective evaluation, its evaluation method is not objective, comprehensive, and has omitted the optical information except brightness.Simultaneously, existing assessment method is not considered people's physiological characteristic yet, all kinds of normal optical electric explorer of the employing detected image of machinery only, and its evaluation result and people's true observation is experienced a certain distance.Therefore, apparent, under potential market demand widely, the method for testing that a kind of more suitably bore hole 3D shows has broad application prospects.

Summary of the invention

The purpose of this utility model is to provide a kind of proving installation of the bore hole 3D demonstration that is more suitable for.

For this reason, bore hole 3D of the present utility model shows that image source and display device integrated test system comprise: by the detecting module of bionical Parameter Modulation; The 3D vision production process that is used for bionical people is by adjusting the structure and parameter of human vision system model, simulation people's field of view, focusing distance, the vision system structure and parameters such as pupil size; Wherein bionical parameter one of refers in binocular interpupillary distance, focusing distance, spectral response range and weight or all; Optical system computer data processing module, for the data that receive detecting module, calculating optical transport function numerical value and modulation transfer function curve comprise the calculating after the eikongen unique point is by three dimensions depth distance modulated; Control module, be used for to control detecting module and do translation, rotation, pitching action, to regulate tested unique point and test macro one of in the relative position of the relative position of horizontal space, depth space, binocular level and pitching visual angle, binocular vision wire clamp angle or whole; And the adjusting that is used for bionical parameter.

The beneficial effects of the utility model are, owing to having adopted biomimetic method and having adopted optical transfer function MTF, so only adopt a bore hole 3D to show the effect of the multiple bore hole 3D display technique of analysis that testing scheme can be more comprehensive, comprehensive, and method is reasonable.

Description of drawings

Fig. 1 is the detection method principle flow chart that the bore hole 3D of the utility model embodiment shows.

Fig. 2 is that the utility model embodiment is in conjunction with the mixing ken method of testing schematic diagram of binocular parallax type bore hole 3D technical equipment.

Fig. 3 is that the utility model embodiment is in conjunction with binocular parallax type bore hole 3D technical equipment test macro schematic diagram.

Fig. 4 is that the utility model embodiment computing machine 3D shows the evaluation process flow diagram.

Embodiment

The following embodiment of the utility model provides bore hole 3D to show image source and display device integrated test system, this test macro is the test macro of bionical human vision system, can simulate the human eye observation process, eikongen fixed position unique point is measured, one of parameters such as the focusing distance of test macro, spectral response, binocular interpupillary distance or all adjustable, tested unique point and test macro all or part of parameter in the parameters such as the relative position of the relative position of horizontal space, depth space, binocular level and pitching visual angle, binocular vision wire clamp angle is adjustable.Adopt with its stereoscopic vision for the bore hole 3D display system that produces principle based on difference and produce the method for testing that principle meets: for binocular parallax type bore hole 3D technology, during test centered by display, do equidistant fan-shaped test, and change horizontal view angle, the pitching visual angle of point of fixity and revolve the subregion test that passes the visual angle; For Multi-level display bore hole 3D technology, the method for taking the fixedly equidistant fan-shaped test of focusing position and different focal position to test by different level; This method and system can test multiple bore hole 3D display technique based on different principle, provide pointed test result.

The present embodiment is as shown in Fig. 1-4.in Fig. 3, 1 is the 3D rendering source, 2 is the eikongen object point, 3 is bore hole 3D display screen, 4 realize equipment for bore hole 3D technology, as the parallax obstacle, grating, lens pillar, 5 is that the image source same point is showing the screen display picture point in different FOV (Field of View), 6 light paths that enter same left/right eye bionic detection device for image source same point different angles image information, 7 is bionic detection device (left-eye/right-eye), 8 is light path and the hardware components of the parameter control module of detecting module, as adjust optical filter, adjust optical detector optical module focal length etc., 9 is software and the computing machine part of the parameter control module of detecting module, by the wavelength response of computer software control detector, the visual field, angle, entrance pupil, the eye response degree, (the corresponding ken test binocular visual angle of mixing such as corresponding parameter is set, the pitching horizontal view angle, the far and near variable of focusing), 10 is the computer data processing module, calculate (flow process is referring to Fig. 4) as optical transfer function, 11 is level angle displacement guide rail (the corresponding ken test space position x that mixes, y, and visual angle variable), 12 is front and back depth displacement guide rail (corresponding mix the ken test space position z variable), 13 are test spatial frequency grid (the corresponding special test component that mixes ken test).Wherein, x, y, z represent the three-dimensional coordinate variable.

According to function, the various piece that the present embodiment relates to can be divided into following several large module:

A, 3D show that image source and display device (are divided into again 3D and show image source module and 3D display device, 3D show image source and display device divide test with and two kinds of tested use, be detected module and comprise that 3D rendering source 1, eikongen object point 2, bore hole 3D display screen 3, bore hole 3D technology in Fig. 3 realize that equipment 4, image source same point are showing screen display picture point 5 in different FOV (Field of View), itself does not belong to the part in this test macro; Test shows that with 3D image source comprises the test spatial frequency grid 13 in Fig. 3, is for the calibration before test);

B, by the detecting module (comprising the bionic detection device 7 in Fig. 3) of bionical Parameter Modulation; Wherein bionical parameter refers to the adjustable parameters such as binocular interpupillary distance, focusing distance, spectral response range and weight, and it is regulated by following control module;

C, optical system computer data processing module (comprise the computer data processing module 10 in Fig. 3, be used for calculating optical transport function numerical value);

D, control module (comprise the software of parameter control module of the light path of parameter control module of the detecting module in Fig. 3 and hardware components 8, detecting module and computing machine part 9, level angle displacement guide rail 11, front and back depth displacement guide rail 12, be used for to control detecting module and do translation, rotation, pitching action, with regulate tested unique point and test macro at the relative position of the relative position of horizontal space, depth space, binocular level and pitching visual angle, the parameter such as binocular vision wire clamp angle; In addition, control module also is used for the adjusting of bionical parameter).

Above 4 the part collaborative works of the utility model for convenience of theoretical analysis, are merged into some Rational Unified Process during working portion illustrates hereinafter closely with some associations.

Facilitate theoretical analysis, middle part participating in optical processing in Fig. 3 is described below is referred to as the optical processing process, optical processing process section in test process adjusts the adjustable parameters such as spectral range, spectral response range and weight thereof.Weight refers in test, the contribution of measured parameter to net result.Because in different 3D technical equipment, MTF is subject to the joint effect of a plurality of variablees such as aforementioned binocular interpupillary distance, focusing distance, and more responsive to some variable, this moment each variable be multiply by weight factor and debugs, might obtain more effective test result, available equation expression is:

Wherein Multivariate ζ ₁, ζ ₂The lower last test result of impact, as the retina MTF of place, v ₁, v ₂Be weight factor, be used for the different contribution degree of each variable of modulation, g, f, w are respectively the mechanism functions of parameters.Also can not establish weight factor, perhaps the weight factor of each variable all gets 1, represents that each variable contribution degree is identical.

3D shows that image source module (3D herein shows that image source module is the part of tested thing) provides the image that utilizes different bore hole 3D display techniques to process, and carries out the space and separates, and this module submodule comprises image input module, 1,2 in corresponding diagram 3; The 3D display device is that bore hole 3D technology realizes equipment, can be that (these submodules are in Fig. 34,5 for the ken or level control module, for example, for binocular parallax type technology, the ken or level control module can be comprised of post lens, grating, sensing light fixture etc.).Its viewing area is different when adopting different bore hole 3D display technique: for binocular parallax type bore hole 3D display device, divide the ken for the space angle scope of the different images of right and left eyes; For chromatography type bore hole 3D display device, the spatial dimension when focal position being changed is divided level.

The bionic detection module receives the image information that 3D shows image source module, the process of simulation anthroposcopy image, the 3D vision production process that is used for bionical people, by adjusting the structure and parameter of human vision system model, simulation people's field of view, focusing distance, the vision system structure and parameters such as pupil size.Image source is output after detector is processed, and the simulation human body receives the process of image.

opticator is that the key modules of system (is analyzed for convenience, herein optical element being arranged or the cluster tool that imaging plays modulating action being referred to as opticator, comprise bionic detection device 7 in Fig. 3, the light path of the parameter control module of detecting module and hardware components 8, computer data processing module 10), thing is decomposed into the spectrum of various spatial frequencys, the optical characteristics of optical system can be considered the transfer reaction ability to various spatial frequencys, thereby (optical transfer function definition sees the GB/T4315.1-2009 optical transfer function part 1 that China Standard Press publishes for details: term to set up the evaluation method of optical transfer function, symbol):

ψ(ξ,η)=∫∫ψ(x,y)exp[-i2π(ξx+ηy)]dxdy （1）

ψ(x,y)=∫∫ψ(ξ,η)exp[-i2π(ξx+ηy)]dξdη （2）

ψ (x, y) be (x, y) spatial domain function, ψ (ξ, η) are ψ (x, y) Fourier spectrum, be the component content that the spatial frequency (ξ, η) that image comprises detected, low-frequency component represents the background that slowly changes and large profile, radio-frequency component presentation video details, limit of integration are the spatial dimensions that has light to pass through.Through after opticator, two variations occur in the sinusoidal signal of each different frequency when image: be at first that degree of modulation (or contrast) descends, be secondly that phase place shifts, and end in a certain frequency.The reduction of contrast is different with frequency with position passing mutually, and the funtcional relationship between them is called optical transfer function, is a kind of effective, objective, comprehensive image quality evaluation method.

Simultaneously, also comprise result of calculation after the eikongen unique point is by three dimensions depth distance modulated in opticator.In real three dimensions, when between object feature point and recording geometry during variable in distance, the image detail of unique point picture side can change.In native system, the three dimensions depth distance z of setting the eikongen unique point is known, ψ ₀(x, y) is the spatial domain function of image source unique point (x, y), utilize the fresnel diffraction theory of wave optics, namely describe the process that it is propagated on the depth of space, after propagating the z distance, its image distribution situation is ψ (x, y), and concrete formula is as follows:

$\begin{array}{c}\mathrm{\ψ}(x,y)\≈\frac{1}{\mathrm{jz\λ}}\underset{\mathrm{\Σ}}{\∫\∫}{\mathrm{\ψ}}_0(x_1,y_1)e^{\mathrm{jkz}[1+\frac{{(x-x_1)}^2+{(y-y_1)}^2}{2z^2}]}d{x}_{1}d{y}_1\\ =\frac{1}{\mathrm{jz\λ}}{e}^{\mathrm{jkz}}\underset{\mathrm{\Σ}}{\∫\∫}{\mathrm{\ψ}}_0(x_1,y_1)e^{\mathrm{jk}\frac{{(x-x_1)}^2+{(y-y_1)}^2}{2z}}d{x}_{1}d{y}_1\end{array}---\left(3\right)$

With (3) formula substitution (1) (2), by Fig. 4 flow process, detector is completed image acquisition, calculating is at the optical transfer function of inspection surface position, obtain the optical transfer function (the optical transfer function definition sees the GB/T4315.1-2009 optical transfer function part 1 that China Standard Press publishes for details: term, symbol) of image characteristic point different frequency, thereby obtain modulation transfer function (Modulation Transfer Frequency, MTF) curve.Can obtain three dimensions reducing degree, picture quality of 3D display technique etc. by the MTF plots changes.

The optical imagery processing module is after the imagery exploitation bionic detection device sampling to the output of 3D display device, can process the image that collects (comprising the processing of the adjustable parameters such as spectral range, spectral responsivity), the image result after processing be carried out data process and evaluation analysis.processing is included in the image that the software filter selects the light of different wavelength range to form is set, the image that filter selects the light of different field ranges to form, obtain the isoparametric numerical value of unique point optical transfer function MTF and brightness, determine limit of integration and the integral mode of image, and the characteristic in the whole image source of the node-by-node algorithm zone of sampling in limit of integration, estimating on this basis the spatial image characteristic of bore hole 3D technology (crosstalks between image, maximum error tolerance limit under fixed resolution, mix under the ken with list, the variation of the 3D rendering mass M TF curve under a plurality of variable change, its formula is aforementioned middle qualitative expression, but can not be fully quantitative.Crosstalk, error margin, MTF variation tendency be a dynamic trend scope, and be not one can formulism the fixed numbers result, the 3D display effect can not rely on formula quantitatively to calculate fully, is one of this method of testing meaning of comparing traditional static measurement)).Above result is processed by computing machine and is shown picture characteristics curve and parameter (curve or the parameter such as binocular fusion degree).Below all draw based on the test result Treatment Analysis to the MTF aggregate of data under each class variable effect, as crosstalk between image in binocular parallax bore hole 3D equipment by the right and left eyes ken aliasing MTF of place decay obtain (crosstalk larger, the MTF decay is faster, crosstalk less, the MTF curve is more level and smooth, decay is slower.MTF is the comprehensive evaluation index of multifactor impact, and it is faster that the image picture element is poorer, spatial frequency descends, and this part is referring to GB/T4315.2-2009 optical transfer function part 2: measure guide rule); The maximum error tolerance limit take human eye can clear resolution threshold value 20 lines right/millimeter is as the boundary, test macro MTF in which kind of angular range decays to and is not less than threshold value; Binocular fusion degree contrast double detector lower curve similarity degree can draw that (two MTF curve results of binocular detector are more approaching, the fusion degree is better, be embodied in the human eye master ken as 28 ° of visual angles with interior approximate better, it is more approaching better that pitching, level angle change lower curve, etc.Binocular MTF result is got difference integration again, and the less fusion of numerical value is better).Finally provide corresponding 3D display effect quality assessment conclusion.Evaluation conclusion directly with the numerical value of MTF reaction, and the variation tendency of MTF is correlated with when changing according to parameter.As the stereoscopic nethike embrane of the overlapping groups of people of the right and left eyes ken MTF of place in binocular parallax type bore hole 3D equipment whether reach threshold value 20 lines of human eye right/millimeter, can judge by the following method: record the MTF variation tendency at detector centered by display when it changes angle whether within the scope of the clear identification of human eye.

control module (is controlled corresponding with the parameter in Fig. 3, take the binocular parallax system as example, to comprising 8, 9, 11, the mechanisms such as 12 control, control module comprises and system's entrance pupil (entrance pupil can limit the incident ray bore of test macro), spectral response, the binocular interpupillary distance, binocular vision wire clamp angle, at the horizontal space relative position, the depth space relative position, the binocular horizontal view angle, the control section that the testing of equipment parameters such as binocular pitching visual angle change), control detecting module and do translation, rotation, the pitching action, as shown in Figure 3, wherein displacement and the rotation angle of rotation control track and translation track are demarcated, the bionic detection device utilizes guide rail, slide rail, the conversion of track and position, translation track implementation space is controlled in the rotation such as three-dimensional platform.The binocular detector can be adjusted level, pitching visual angle, and interpupillary distance, binocular angle, finally realizes many time domains, the multi-level measurement.

The present embodiment is described is applicable to the method for testing that bore hole 3D shows, only uses a test macro just can realize the test of multiple bore hole 3D display technique (by importing different bore hole 3D display technique models, and need not change system equipment).Because different bore hole 3D display technique, its difference mainly is the physics that arouses stereoscopic vision that adopts separately, the approach difference of psychological hint, be reflected in the image that is front end in " output-reception " system and show that the characteristic of output system is different, but the rear end receives test principle and all builds based on the characteristic of the bionical stereoscopic vision of same, does not need to change.Therefore only need to do change according to 8 different variablees in mixing ken method of testing gets final product.

in real three dimensions, when between object feature point and recording geometry during variable in distance, the image detail of unique point picture side can change, the innovation of the present embodiment is, comprise calculating after the eikongen unique point is by three dimensions depth distance modulated in final calculation result, obtain the three dimensions reducing degree of 3D display technique by the MTF plots changes, objective examination's results such as picture quality, in conjunction with simulation human visual system spectral response during target observation to external world, system's entrance pupil (entrance pupil can limit the incident ray bore of test macro), the binocular interpupillary distance, binocular vision wire clamp angle, at the horizontal space relative position, the depth space relative position, the binocular horizontal view angle, bionical method of testing when the observation conditions such as binocular pitching visual angle change, measure more comprehensive, utilize the single angle measurement of many kens test replacement, result is more credible, be applicable to multiple bore hole 3D display technique, can do for different technology the analysis that differs from one another, but and software modeling with the form work of virtual instrument, faster easy-to-use.

The mixing ken method of testing of the present embodiment combines 8 variablees (system's entrance pupil (entrance pupil can limit the incident ray bore of test macro), spectral response, binocular interpupillary distance, binocular vision wire clamp angle, in horizontal space relative position, depth space relative position, binocular horizontal view angle, binocular pitching visual angle) bionical of human vision system.

(be exactly " the spatial frequency grid " 13 in Fig. 3 at distance map image source specific location test multi-frequency image grid when at first testing, in eikongen input end input virtual " spatial frequency grid ", the spatial frequency grid of namely expressing with image format, spatial frequency grid parameter and its locus that is positioned at eikongen are known, to the test of spatial frequency grid), realize the test macro demarcation, timing signal is in this way to the entity testing apparatus, using it to carry display device gets final product, calibration process comprises the multiple spot fixed test to the spatial frequency grid, as aforementioned mentioned selected test specification etc., as to virtual modelling apparatus, its display device is carried out modeling, as there is no concrete display device regulation, give tacit consent to the default binocular parallax type display device of use such as post lens, grating barrier.Although in this example, timing signal is usage space frequency grid image, also can adopt other optic tests image source that is easy to use, record MTF commonly used.

After completion system is demarcated, (aforementioned formula has been mentioned mixing under ken method of testing has 8 variablees to affect the result of MTF with unitary variant method, multivariate method, the unitary variant method is namely fixed all the other 7 variablees, only change 1, the variation characteristic of research MTF or other optical parametrics, this moment is as the curvilinear motion of research function of a single variable.Multivariate method, after namely introducing a more than variable, test result under multivariate changes simultaneously, corresponding curved surface as 2 meta-functions, the vector space variation tendency of 3 yuan or the multivariate function) eikongen and 3D display device are mixed ken test test, analyze the data that detect and draw test result.(the optical transfer function measuring method is referring to GB/T4315.2-2009 optical transfer function part 2: measure guide rule).

Test is completed, and when another 3D display device of test, can again demarcate.

The various combination of 8 variablees of this Design of Test System,, can directly be tested according to definite testing scheme, otherwise need again to demarcate under the prerequisite of not changing variety classes 3D display device with factory's same specification equipment as testing scheme.

Claims (4)

1. a bore hole 3D shows image source and display device integrated test system, it is characterized in that comprising:

Detecting module by bionical Parameter Modulation; The 3D vision production process that is used for bionical people is by adjusting the structure and parameter of human vision system model, simulation people's field of view, focusing distance, the vision system structure and parameters such as pupil size; Wherein bionical parameter one of refers in binocular interpupillary distance, focusing distance, spectral response range and weight or all;

Optical system computer data processing module, be connected with the output terminal of detecting module, be used for receiving the data of detecting module, calculating optical transport function numerical value and modulation transfer function curve comprise the calculating after the eikongen unique point is by three dimensions depth distance modulated;

Control module, be connected with the control end of detecting module, be used for to control detecting module and do translation, rotation, pitching action, to regulate tested unique point and test macro one of in the relative position of the relative position of horizontal space, depth space, binocular level and pitching visual angle, binocular vision wire clamp angle or whole; And the adjusting that is used for bionical parameter.

2. bore hole 3D as claimed in claim 1 shows image source and display device integrated test system, it is characterized in that: also comprise the spatial frequency grid, be used for the front calibration of test.

3. bore hole 3D as claimed in claim 1 or 2 shows image source and display device integrated test system, it is characterized in that: detecting module comprises the parameter control module, described parameter control module comprises light path and hardware components, software and computing machine part, described light path and hardware components are used for adjusting optical filter, adjust optical detector optical module focal length, described software and computing machine part, be used for by the wavelength response of computer software control detector, the visual field, angle, entrance pupil, the eye response degree, corresponding parameter is set, described parameter comprises mixes ken test binocular visual angle, the pitching horizontal view angle, the far and near variable of focusing.

4. bore hole 3D as claimed in claim 3 shows image source and display device integrated test system, it is characterized in that: the parameter control module of detecting module also comprises the level angle displacement guide rail, be used for regulating mixing ken test space position x, the y variable, and visual angle variable, before and after the depth displacement guide rail, be used for adjusting and mix ken test space position z variable.

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