CN103356158A - Novel human eye color visual characteristic evaluating system - Google Patents

Abstract

The invention discloses a novel human eye color visual characteristic evaluating system which comprises four modules including a flat panel display, an observed-person face positioner, observed-person responding equipment and a computer. Color characterization calibrating has been performed on the flat panel display, and the flat panel display can realize switching between RGB (red, green, blue) color space related with the equipment and CIEXYZ color space irrelevant with colored patches. A display screen is controlled through a computer program, a color block sample needed to be evaluated is set and loaded by a tester, an interaction interface is displayed when an observed person is in a test, the observed person is guided to perform color appearance evaluation by psychological and physical methods on a specified color block area, psychological response values of the observed person are recorded, and response value information is automatically analyzed and counted to verify coincidence of a predicted model and test results. The novel human eye color visual characteristic evaluating system can be widely applied to automatic evaluation of various conventional or complex color blocks on a colored display screen, and has the advantages of easiness to realize, flexibility, quickness, accuracy and the like.

Description

A kind of vision characteristics evaluation system of novelty

Technical field

The present invention relates to the color vision science and technology field, specifically, relate to a kind of visual evaluation system for test human eye color-aware characteristic.

Background technology

Vision has critical role as the abundant information source of human beings, and in the vision Color perception be in the visually-perceptible to entering the electromagnetic response of human eye, we are that the electromagnetic wave of 380～760 nanometers causes that visually-perceptible (visual perception) is referred to as colour vision (color sensation) with wavelength usually.Haply, the color-aware of visible spectrum from the long wave to the shortwave roughly is divided into for red, orange, yellow, green, blue or green, blue, purple.

The human visual system is considered to be subjected to three nerve signal affected, be respectively yellow-blue, red-green and black-white colour perception cell, transmission advance brain these three pairs of signal deciding people at ordinary times to the perception of color.For a body surface, its color is by the decision such as material, texture, spectral absorption characteristics of itself, and the color looks of body surface also are subjected to the impact of the factors such as illumination, environment and background, and the object of a certain color presents different colors in varying environment.The standard observer (standard observer) who obtains from the color matching curve (color matching function) of human eye can accurately describe the color of an object, has directly reflected the actual perceived of human eye product colour.Under specific how much observation conditions and lighting condition, CIE (International Commission on Illumination) has recommended the several method that is converted into numerical value for the Color perception with this human eye, and the model that quantizes the object color looks and describe the psychological attribute of its color is called color looks model.Research through decades, existing plurality of color looks model is suggested in the world, such as (document 1:Quantifying colour appearance.Part I.Lutchi colour appearance data such as Hunt, Nayatani, RLAB, LLab, CIECAM97s, CIECAM02 color cat models, M.Ronnier Luo etc., Col.Res.Appl., 2007,16 (3), 166-180).The perception that quantizes color is to obtain data by a large amount of visual experiments, traditional method is that a given test color lumps and one are with reference to color lump, (such as special-purpose D65 lamp box) assesses its lightness, chroma and tone with a large amount of experimenters under specific environment, obtains color looks statement model by data fitting again.But, this experiment condition cost is high on the one hand, experimental design is complicated and be unfavorable for the collection of data, can't do color looks assessment experiment for the color-aware of special-effect on the other hand, such as gradient color, the pearly-lustre color, the body surface that metallochrome etc. have color change sense on the space just has and the different color looks of even color lump perception (document 2:Modeling the appearance of special effect pigment coatings, T.A.Germer etc., Proc.SPIE 4447,2001,77-86), traditional appraisal procedure can not obtain the sensor model (document 3: a kind of visual contrast resolution test method of this type of complicated color displays mode in people's color vision, Chinese invention patent, 200710078497.9 and document 4: colour vision-identification characteristic automatic quantitative testing system, Chinese invention patent, 02137783.9).

Summary of the invention

The object of the present invention is to provide a kind of vision characteristics evaluation system of novelty, it realizes that by using computer programming control is through the colorful display screen of colorimetric characterization, under specific background color, provide at random the test color block by group and with reference to color lump, and by in short-term blinking cursor appointment assessment area position, automatically record and put in order afterwards experimenter's response message.Color vision evaluating characteristics of the present invention system can be widely used in the self-service assessment of computer simulation of various tradition or complex colors color lump.

For reaching above purpose, the vision characteristics evaluation system that embodiments of the invention propose, adopt following four critical pieces:

1) flat-panel screens of process colorimetric characterization;

2) the facial localizer of observer;

3) observer's answering equipment;

4) main frame.

In order to guarantee the credibility of experimental result, wherein the colorimetric characterization process is that the RGB device dependent color spaces that display generally adopts is transformed into CIEXYZ (or irrelevant based on the miscellaneous equipment of CIEXYZ) color space, that is the display calibration process; The facial localizer of observer is to allow each observer's the roughly the same position of eyes maintenance test repeatability to improve; Answering equipment is keyboard or Mus mark; Main frame has loaded the control sequence of visual experiment task, and the control display device.Control sequence shows respectively background area, test color lumps zone, test point boot symbol on display, with reference to color block areas and reply the zone.

The demand that be to adapt to the different colours visual experiment, the color lump that the test color lumps zone is called in this test sample storehouse by Automatic Program show, guarantees the human eye piece central vertical of checking colors when building, and to make color lump be 2 degree from color lump apart from angle to human eye.

Experimental duties namely utilize amplitude Estimation (magnitude estimation) method of psychophysics to allow the observer appointed area of the color lump of random displaying be done the assessment of color, specifically are the quantitative estimation of doing lightness, chroma and tone according to the reference color lump of reference zone.The automatic hourly observation person of computer program replys, and does repeatable judge in the group, effectiveness judge and calculate final this user's subjective quantification result after everyone finishes Total Test; After everyone finishes, do repeatable judge between group, correlation analysis and unusual array and reject, finally provide the reliable average visual result of all observers.

The present invention compares with background technology, and the beneficial effect that has is:

1) uses and substitute physical color lump based on computer-controlled display screen color lump and do color assessment experiment, can reduce experimental cost, and make things convenient for programme-control and calculating, thereby improve systematicness and the reliability of experiment;

2) adopt the amplitude Estimation method of psychophysics that the color of target area is assessed, and can carry out the quantification of psychology yardstick to the color performance of complicated color by instant indicator, further the color effect of actual object is made model and set up;

3) have computer-controlled computing function, can automatic monitoring repeatability and the degree of accuracy of data, and the value of the adding up last person that presents to the experimental design.

The native system principle is based upon on the up-to-date chromatology Research foundation, and working specification meets color science related work standard, but and have illustrative and system robustness, can adapt to various testers' experiment demand.Below by drawings and Examples, technical scheme of the present invention is done more detailed elaboration.

Description of drawings

Fig. 1 is system structure schematic diagram provided by the present invention;

Fig. 2 is the experiment interface that the present invention shows the observer;

Fig. 3 is control sequence operational process logic chart of the present invention;

The specific embodiment

For making purpose of the present invention, technical scheme and expressing a little more clearly, the below is described in detail system provided by the present invention, and further embodiment is described by reference to the accompanying drawings.

As shown in Figure 1, the vision characteristics evaluation system of a kind of novelty that the present invention proposes comprises following four main modular:

1) module 101: flat-panel screens;

2) module 102: the facial localizer of observer;

3) module 103: observer's answering equipment;

4) module 104: computation host.

Wherein module 101 flat-panel screens are the image displays through the colorimetric characterization process, the colorimetric characterization process is with mutually the changing such as the CIEXYZ color space of device-dependent rgb color space device independent, and operation experiment control program is with required assessment color color lump, be presented on the screen of this equipment with reference to color lump and working place during experiment.

In order to reach better experiment concordance, adopted module 102 facial localizers, the observer guarantees that at experimental session its head position fixes.

Module 103 is observer's answering equipments, comprises keyboard or mouse, is convenient to the perception response of current color is inputted into system according to screen prompt.

Whole system is said definitely by the control of parts 104 main frames, by the control sequence control of having loaded the visual experiment task.

In four modules, on the flat-panel screens house laboratory table (module 106), the facial localizer of observer also is placed on one section of laboratory table, in the time of can making the observer that face is placed 102 facial observer, the evaluated regional color lump that shows in the eye sight line direct-view flat-panel screens, and so that the size of color lump is 2 degree in the visual angle; Module 104 main frames link to each other by data wire (module 105) with module 101 flat-panel screens, module 103 observer's answering equipments, wherein module 103 observer's answering equipments place module 102: near the laboratory table the facial localizer of observer (module 106), be convenient to user's input.

The experiment control program can allow the laboratory technician be loaded into the color lump sample that need to show before allowing the observer test, and shows the interactive interface such as Fig. 2 when the observer tests.Show respectively background viewing area 201, test color lumps zone 202, assessment objective regional guidance symbol 203, with reference to color block areas 204 and 205, answer number value viewing area 206 and 207, and experiment progress display unit 208, next group test question button 208.

Wherein the prize lightness of usefulness and chroma of visual experiment (regarded lightness 100 as with reference to (204 and 205) for the N10 of Munsell (Munsell) color order system, see the colour atla of lower left among Figure 11) and the 3040-R20B (regarding chroma 40 as, i.e. bottom-right colour atla among Figure 11) of Natural color system (NCS).According to the amplitude evaluation method in the psychophysics, with reference to the meaning of color lump be:

The color lump that shows can be the special-effect color lumps such as the solid color color lump of appointment or gradient color, metallic luster color, pearly-lustre color, the appointed area is carried out the visually-perceptible assessment of color by assessment objective regional guidance symbol 203 guiding observers.

Fig. 3 is the workflow of whole system when being used to test,

Step 301: wait for that the experimenter carries out environment configurations, inform observer's experimental technique, and in control system, put into the color lump Sample Storehouse of needs assessment;

Step 302: according to the display characteristic of characterization model calibration flat-panel screens 101;

Step 303: carry out randomly ordered to Sample Storehouse;

Step 304: control sequence shows a certain color lump sample, and specifies zone to be assessed, allows the observer carry out the assessment of color looks;

Step 305: the response value of hourly observation person's color looks assessment perception;

Step 306: judge whether this observer finishes all samples are assessed, if just carry out next step, otherwise get back to step 304;

Step 307: this observer's assessment data is analyzed and added up, and be recorded to disk;

Step 308: judging whether that all observers finish assesses all samples, if just carry out next step, otherwise gets back to step 303

Step 309: analyze all data

Step 310: obtain the experimental result of statistical average, and and the result of calculation of color looks (correction) model that proposes of experimenter compare, draw experiment conclusion.

In analytical data step 309, the data that need to analyze comprise that the uncertainty of visual experiment data comprises: 1) observer's repeatability separately, i.e. data uncertainty between twice repeat assessment of every observer; 2) irrelevance between observer and the observer, i.e. difference between every observer and all the observer's average results; 3) uncertainty of observer's meansigma methods, i.e. the visual experiment done of all observers uncertainty between average and the secondary average has as a result for the first time reflected the credibility of multidigit observer result being carried out obtaining behind the date processing result.This credibility judges by data sequence more in twos with coefficient of variation CV, and wherein coefficient of variation CV is defined as:

$\mathrm{CV}=100\sqrt{\frac{1}{N}\underset{i=1}{\overset{N}{\mathrm{\Σ}}}\frac{{(X_i-{\mathrm{fY}}_i)}^2}{{\stackrel{\‾}{X}}^2}}$

X in the formula _iAnd Y _i(i=1,2 ..., N) two groups of data to be compared of expression,

With

Be the average of corresponding array, the f factor representation is

$f=\frac{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{X}_i{Y}_i}{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{X_i}^2}$

In sum, the invention provides a kind of vision characteristics evaluation system of novelty, its working specification meets color science related work standard, but and have illustrative and a system robustness; The present invention can be widely used in various tradition or complex colors color lump in the self-service assessment of color display screen, and has easy realization, motility, the quick advantage such as accurate.Need to prove at last, above elaboration is only showed for flow process and example that an embodiment is carried out, with which kind of technical scheme that explanation the present invention adopts, is not for limiting protection scope of the present invention.Those skilled in the art worker can understand the mentioned techniqueflow of the present invention easily; all making within framework of the present invention and the thought any modification, be equal to replacement even technology or the improvement improvement of using etc., all be included within the rights protection of the present invention.

Claims (5)

1. the vision characteristics evaluation system of a novelty is characterized in that comprising with lower member:

1) color plane display;

2) the facial localizer of observer;

3) observer's answering equipment;

4) main frame.

According to claim 1 shown in system, it is characterized in that the color plane display through demarcating, namely set up the relation between the device independent color space such as the relevant color space of himself RGB equipment and CIEXYZ by the colorimetric characterization process.

According to claim 1 shown in system, it is characterized in that main frame has loaded the control sequence of visual experiment task, on display, show respectively background area, test color lumps zone, test point boot symbol, with reference to color block areas and reply the zone.

According to claim 1 shown in system, it is characterized in that this system utilizes psychophysical method to allow the observer appointed area of the color lump of random displaying be done the visual assessment of color-aware, the color lump of demonstration can be the special-effect color lumps such as the solid color color lump of appointment or gradient color, metallic luster color, pearly-lustre color.

According to claim 1 shown in system, it is characterized in that the functional module of control sequence process user response comprises:

1) is written into the color lump Sample Storehouse;

2) call the characterization model of color plane display;

3) carry out randomly ordered to Sample Storehouse;

4) show a certain color lump sample, the guiding observer is to carrying out the assessment of color looks with the color of assessment area;

5) response value of hourly observation person's color looks assessment perception;

6) this observer's assessment data is analyzed and statistical module;

7) analyze all observers' experimental data module;

8) obtain experimental result and the record of statistical average.

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