CN101009852A - Color management system for mixed connection wall and its control method - Google Patents

Abstract

The disclosed color management system for joint wall comprises: a PC, a chroma probe system, a probe auto-positioning system mechanical connected with last system, a display system with a control system, and the interface system. This invention has high precision and fast speed, and can correct many features of current joint display system, such as base color consistency, gray, white field, and dark field, etc.

Description

Color management system for mixed connection wall and control method thereof

Technical field

The present invention relates to color management system for mixed connection wall and control method thereof.

Background technology

Color management for light is to piece together wall field color, the conforming problem of GTG for solving, and the color algorithm of a cover auto color correction is provided, and improves the existing artificial efficient of adjusting display quality, finally reaches the purpose that replaces.

Display quality at splice displaying system field image is a critical index, and color management for light is controlled at display quality, all there is the color control technology of oneself in each splice displaying system company, but a lot of companies are that the mode of utilizing algorithm to carry out the color match is proofreaied and correct, as a result result of calculation and actual differing greatly.

Owing to the intrinsic parameter difference of each part in the combination system, must cause the display effect difference of each display device.

More than these system problems cause used splice displaying system to make the commercial city must providing multiple adjustment means that every display device in the splice displaying system is adjusted separately, make its display effect unanimity.

Summary of the invention

The present invention provides a cover color management system for mixed connection wall and a control method thereof for solving above technical problem, has the precision height, and speed is fast, to characteristics such as the compatibility of instrument are good.

In order to solve above technical problem, color management system for mixed connection wall comprises compositions such as Gamma automatic switchover module, the automatic correcting algorithm of GTG, DCC matrix processing module, the automatic correcting algorithm of DCC, static DIFFUSION TREATMENT module, probe system.Can proofread and correct display characteristics such as the primary colours consistency of splice displaying system, GTG smoothness, colour temperature consistency, Bai Chang, details in a play not acted out on stage, but told through dialogues.

Color management for light is attached to the combination system, and its combination system mainly comprises display system, interface system, probe automatic station-keeping system, probe system, PC system.Module in the system all is a standard design, can be used in the splicing systems such as DLP, LCD, PDP.

Display system provides the signal Presentation Function, is the controlling object that color management for light is wanted most, and Gamma automatic switchover module, DCC matrix processing module, static DIFFUSION TREATMENT module are all in the middle of this structure.

Interface system is realized the function of instruction transformation and communication, is responsible for converting the control command of PC system to display system receptible control command.

The probe automatic station-keeping system is controlled by interface, and the delivery probe system is done whole wall test action in splice displaying system.

Probe system is responsible for gathering the light signal of display system.

Master system is responsible for moving the automatic correcting algorithm of GTG, the automatic correcting algorithm of DCC, other function controls etc.

Color management for light uses the preceding detection mode of screen, and PC is by interface controlled motion mechanism, and structure as shown in Figure 1.

The system of color management for light comprises Gamma automatic switchover module, the automatic correcting algorithm of GTG, DCC matrix processing module, the automatic correcting algorithm of DCC, static DIFFUSION TREATMENT module, probe system, probe sampling algorithm composition.

The hardware configuration processing picture signal that Gamma automatic switchover module, DCC matrix processing module, static DIFFUSION TREATMENT module are system in the color management for light is exported to display system and is carried out the image demonstration; Probe system is changed the XYZ digital signal with light signal then, be input in the Control Software of PC, the automatic correcting algorithm of the DCC in the software, the automatic correcting algorithm of GTG calculate series of parameters and be transferred to the Control Parameter that control system is revised Gamma automatic switchover module, DCC matrix processing module by hardware interface, realize the closed-loop control of color management for light, system configuration as shown in Figure 2.

Each several part to color management for light describes respectively below:

Gamma automatic switchover module:

Gamma automatic switchover module, solve image semi-tone, it is controlling the intermediate level of photo, proofread and correct the non-linear display characteristic of display, the special phenomenon that solves the system's GTG colour temperature drift that contains white section, Gamma automatic switchover module is handled picture signal, uses two cover Gamma curve look-up table in the module, utilizes special purpose function signal to be judged and the two cover Gamma curve look-up table that automatically switch.

DCC matrix processing module:

DCC matrix processing module, the monochromatic inconsistent phenomenon of resolution system R, G, B, DCC matrix processing module is handled picture signal, uses 3 * 3 coefficient matrix to carry out computing in the module, obtains a new signal value again.Its optical principle is that the colour triangle adjustment that many display devices of display system are different becomes unanimity.

Static DIFFUSION TREATMENT module:

Static diffuse module is used for the display gray scale of display device is improved more than the 2bit.Static diffuse module is with being as several points and regulating unit more than four, after the signal of input carried out three-dimensional (two-dimensional space one dimension time) diffusion, the gray level resolution of display device is improved more than the 2bit, can overcome like this because of GTG sudden change problem through occurring in details in a play not acted out on stage, but told through dialogues behind the Gamma correction.Signal after static diffuse module diffusion will be delivered to display device and show.

The colourity probe system:

The colourity probe system uses Color Sensor (color sensor) as detecting core component.The original dateout of probe meets three values of XYZ of CIE-1931 standard, by phototiming circuit and de-twitter circuit, analog output signal is converted into digital signal through 10Bit ADC high-speed sampling, and be XYZ by the algorithmic transformation of single-chip microcomputer, convert Yxy, color temperature value to through the numerical value transfer algorithm, output to the outside by infrared interface.

The automatic correcting algorithm of DCC:

The essence of the automatic correcting algorithm of DCC is a kind of pid control algorithm, it carries out decoupling zero by the XYZ optical signalling that probe system is detected, use the PID controller then, the matrix parameter of DCC is adjusted, the XYZ value that detects up to probe system is identical with our desired value of design.

The automatic correcting algorithm of GTG:

The automatic correcting algorithm of GTG is that pid control algorithm adds fitting algorithm, it carries out decoupling zero by the XYZ optical signalling that probe system is detected, use the PID controller then, Gamma curve look-up table adjustment point parameter is adjusted, the XYZ value that detects up to probe system is identical with our desired value of design, use approximating method that all the other parameters are carried out computing then, finish the evaluation work of whole Gamma curve look-up table.

Description of drawings

The invention will be further described below in conjunction with the drawings and the specific embodiments.

Fig. 1 is the structure chart of combination.

Fig. 2 is the color management for light structure chart of combination.

Fig. 3 is the automatic correction module structure chart of DCC.

Fig. 4 is the Gamma curve of the R under the GTG, G, B.

Fig. 5 is the automatic correction module structure chart of GTG.

Fig. 6 is the FPGA signal processing structure.

Fig. 7 is a colourity probe circuit functional-block diagram.

Fig. 8 is a colourity probe movement mechanism map.

Fig. 9 is probe automatic station-keeping system circuit block diagram.

Embodiment

Color management system for mixed connection wall is that basis is carried out algorithm design to the research of the display characteristic of display device, and control algolithm comprises: show output equation, DCC algorithm, the automatic correcting algorithm of DCC, the automatic correcting algorithm of GTG, static DIFFUSION TREATMENT algorithm, probe sampling algorithm composition.Color management system for mixed connection wall hardware comprises: Gamma automatic switchover module, DCC matrix processing module, colourity probe system.

Show that output equation and DCC algorithm, three algorithms of the automatic correcting algorithm of DCC cooperate the primary colours consistency problem that solves splice displaying system; The automatic correcting algorithm of GTG solves GTG smoothness, colour temperature consistency, Bai Chang, details in a play not acted out on stage, but told through dialogues correction problem; Static DIFFUSION TREATMENT algorithm is to promote the color expressive ability to make GTG excessively more level and smooth.

Respectively various algorithms are elaborated below:

Show output equation:

Analyzing between DCC correction input and the optical signalling XYZ by experiment is linear relationship.

Obtain showing that output equation is:

Show output equation $\left[\begin{array}{c}X\\ Y\\ Z\end{array}\right]=\left[\begin{array}{ccc}{r}_1& g_1& b_1\\ r_2& g_2& b_2\\ r_3& g_3& b_3\end{array}\right]\·\left[\begin{array}{c}\mathrm{RR}\\ \mathrm{RG}\\ \mathrm{RB}\end{array}\right]$ R, g, b are proportionality constant

The DCC algorithm:

Adjusting RGB three primary colors summit and realize color, brightness unanimity, is the position of adjusting RGB three primary colors summit by three passage mixed coefficints of RGB among the DCC in fact, and the DCC algorithm is shown below.

$\left[\begin{array}{c}{Y}_R\\ Y_G\\ Y_B\end{array}\right]=\left[\begin{array}{ccc}\mathrm{RR}& \mathrm{GR}& \mathrm{BR}\\ \mathrm{RG}& \mathrm{GG}& \mathrm{BG}\\ \mathrm{RB}& \mathrm{GB}& \mathrm{BB}\end{array}\right]\·\left[\begin{array}{c}{X}_R\\ X_G\\ X_B\end{array}\right]$

X _R, X _G, X _B: RGB channel signal (10 bit).

RR, GG, BB, RG, RB, GB, GR, BR, BG: dominant hue integral coefficient

Y _R, Y _G, Y _B: rgb signal output.

The automatic correcting algorithm of DCC:

The automatic correcting algorithm of DCC comprises the automatic correcting algorithm of DCC, artificial brightness fine setting algorithm.

1, the automatic correcting algorithm of DCC

The automatic correcting algorithm of DCC is a kind of pid control algorithm, uses the control of PID controller in color control.Realization PID control must be carried out decoupling zero to it earlier.And according to the difference (different cassette mechanism parameter difference) that shows output equation, the decoupling zero function, the PID controller parameter is adjustable.

The automatic correction module structure of DCC is seen Fig. 3, and the purpose of decoupling zero matrix is that red section, green section, blue section influence is separated from optics XYZ.Monitor with PID control then.

The decoupling zero matrix:

$\left[\begin{array}{c}{X}_L\\ Y_L\\ Z_L\end{array}\right]=\left[\begin{array}{ccc}{X}_r& X_g& X_b\\ Y_r& Y_g& Y_b\\ Z_r& Z_g& Z_b\end{array}\right]\×\left[\begin{array}{c}R\\ G\\ B\end{array}\right]$

X _L, Y _L, Z _LBe input optical signal, X _rY _rZ _r, X _gY _gZ _g, X _bY _bZ _bBe red, green, blue section output XYZ output signal.R, G, B are the allocation proportion coefficient.

Digital PID Controller:

Use the increment type PID control algolithm.

2, artificial brightness fine setting control algolithm:

Because there is the problem of subtense angle in screen, and the colourity probe system in the automatic correcting algorithm of DDC only carries out the local center detection, makes human eye perceived brightness when observing each screen inconsistent.

By observing, XYZ to the Yxy conversion formula as can be known:

$y=\frac{Y}{X+Y+Z}$ $x=\frac{X}{X+Y+Z}$

Must cause x in the time will promoting brightness Y value, y changes, and way is to multiply by a proportionality coefficient a up and down at fraction simultaneously, Y is changed but chromaticity coordinates is constant.

$y=\frac{a\·Y}{a\·(X+Y+Z)}$ $x=\frac{a\·X}{a\·(X+Y+Z)}$

And owing to X, Z after multiply by a proportionality coefficient a also can change, so how a method has all changed X, Y, Z simultaneously.By analyzing, analyze the matrix that shows output equation and know.

$\left[\begin{array}{c}X\\ Y\\ Z\end{array}\right]=\left[\begin{array}{ccc}{r}_1& g_1& b_1\\ r_2& g_2& b_2\\ r_3& g_3& b_3\end{array}\right]\·\left[\begin{array}{c}\mathrm{RR}\\ \mathrm{RG}\\ \mathrm{RB}\end{array}\right]$

X, Y, Z multiply by a coefficient, just are equivalent to RR, RG, RB and all multiply by a coefficient, will all multiply by a coefficient from the good DCC parameter of dynamic(al) correction and with regard to guaranteeing brightness be adjusted, but chromaticity coordinates remains unchanged.

DCC is from the realization of dynamic(al) correction:

It is chromaticity coordinates triangle and brightness value under 900,0,0 coefficient correction at DCC that each display unit of wall system is pieced together in test, by calculating inscribe chromaticity coordinates triangle, determines the desired value of adjusting (XYZ).By the real-time monitor allocation difference signal of PID controller, constantly adjust the value of DCC then, progressively approach control, the desired value that reaches.Reach default aimed at precision.

The accuracy computation formula is: $\mathrm{Error}=\sqrt{{\mathrm{\ΔX}}^2+{\mathrm{\ΔY}}^2+{\mathrm{\ΔZ}}^2}$

1, control flow (software program)

A) multi-screen DCC value is set and is [900,0,0]

B) the chromaticity coordinates triangle of detection multi-screen.

C) calculate inscribe chromaticity coordinates triangle, obtain target XYZ value.

D) multi-screen DCC value is set and is [1023,0,0]

E) the XYZ maximum of detection multi-screen.

F) input target XYZ value obtains red, green, blue section XYZ Target Assignment value.

G) multi-screen DCC value is set and is [900,0,0], calculate the XYZ apportioning cost.

H) according to distributing difference signal, pid algorithm calculates the new DCC value of output.

I) the XYZ value of detection multi-screen calculates the XYZ apportioning cost.

J) whether satisfy the default condition, do not satisfy rebound (h).

K) satisfy condition and withdraw from correction.

L) finish three primary colors and proofread and correct after, utilize the method for artificial brightness fine setting to carry out again DCC and adjust.

2, hardware implementation method:

The DDC zero offset capability is made up of DCC algorithm, the automatic correcting algorithm of DDC, the artificial brightness fine setting of DDC control algolithm.

The DCC algorithm is realized in the FPGA of control system; The automatic correcting algorithm of DDC, the artificial brightness fine setting of DDC control algolithm are realized by the software in the PC.

The automatic correcting algorithm of GTG:

Gray scale correction is to use the Gamma curve colour temperature and the brightness of GTG are adjusted, and this method of adjustment all is suitable for for artificial adjustment and automatic the adjustment.

The GTG color temperature adjusting method is as follows, if GTG colour temperature when details in a play not acted out on stage, but told through dialogues is on the low side, thereby then utilizes blue Gamma curve that the blue brightness of details in a play not acted out on stage, but told through dialogues is promoted the lifting that reaches colour temperature; GTG colour temperature when bright field is higher, thereby then utilizes red Gamma curve that the red brightness of bright field is promoted the reduction that reaches colour temperature.

The brilliance control of GTG can be risen in proportion, descend and also can realize R, G, three Gamma curves of B.

From Fig. 4 as seen, the Gamma curve of B is owing to the optical characteristics difference of different display devices, and then curve characteristic is also different, if still use this curve to proofread and correct demonstration under monochrome, even the brightness that process DCC proofreaies and correct out also all can be inconsistent.For addressing this problem, we use the method for white section separating controlling now.

The automatic correcting algorithm of GTG comprises: Gamma automatic switchover algorithm, the automatic correcting algorithm of GTG, Gamma curve fitting algorithm.

1, Gamma automatic switchover algorithm

Utilize Min (R, G, B) function comparator, signal is detected.If all movements use same Gamma checking list in the time of white section useless, but movement will use white section Gamma checking list to carry out colour temperature, brilliance control when adding for white section.So just can guarantee the consistency of R, G, B, C, Y, M.While GTG colour temperature is may command also.

2, the automatic correcting algorithm of GTG

The automatic correcting algorithm of GTG is to have revised the decoupling zero matrix on the basis of the automatic correcting algorithm of DCC, because the difference of two algorithm maximums is whether white section have adding to influence color characteristics, at this moment controlled device is adjusted dot factor by the Gamma table that original DCC matrix coefficient becomes R, G, B.

From Fig. 5 as seen, the purpose of decoupling zero matrix is separated red section, green section, blue section, white section influence from optics XYZ.Monitor with PID control then.

The decoupling zero matrix:

$\left[\begin{array}{c}{X}_L\\ Y_L\\ Z_L\end{array}\right]=\left[\begin{array}{cccc}{X}_r& X_g& X_b{X}_w& \\ Y_r& Y_g& Y_b{Y}_w& \\ Z_r& Z_g& Z_b{Z}_w& \end{array}\right]\×\left[\begin{array}{c}R\\ G\\ B\end{array}\right]$

X _L, Y _L, Z _LBe input optical signal, X _rY _rZ _r, X _gY _gZ _g, X _bY _bZ _b, X _wY _wZ _wBe red, green, blue, white section output XYZ output signal.R, G, B are the allocation proportion coefficient.

Digital PID Controller:

Use the increment type PID control algolithm.

3, Gamma curve fitting algorithm:

Because every kind of monochromatic Gamma curve is made up of 256 sampling points, and it is very long all to carry out correction time with 256, and effect and fitting algorithm result calculated be more or less the same, so we only carry out gray scale correction to 3 points wherein in engineering is used, all the other points produce with the match mode.

The Gamma curve fitting algorithm uses the cubic polynomial interpolation algorithm of one dimension to realize.

GTG is from the realization of dynamic(al) correction:

The accuracy computation formula is: $\mathrm{Error}=\sqrt{{\mathrm{\ΔX}}^2+{\mathrm{\ΔY}}^2+{\mathrm{\ΔZ}}^2}$

1, control flow (software program)

A) white section of all screens adjusted to maximum (255), the peaked screen of sensed luminance.

B) manually adjust the colour temperature of high-high brightness screen.Coupling RGB color-ratio.

C) brightness value of adjusting white section is automatically adjusted DCC value and White Peaking value, makes the brightness value unanimity of each screen.

D) DCC is resetted, measure the curvilinear structures and the chromaticity coordinates of the white section of each screen, soon respectively shield the pure color XYZ under signal under the WhitePeaking value, deduct White Peaking and be 0 o'clock XYZ.

E) calculate minimum brightness curve (aim curve of target screen) and segmentation and obtain corresponding brightness and chromaticity coordinates value.The display device brightness that promptly white section more early adds is low more.

F), just can obtain the compensation RGB respective value XYZ of each screen correspondence with white section total brightness output valve that deducts each section of target screen correspondence of other each section of screen correspondences.

G) segmentation is from dynamic(al) correction (utilizing automatic primary colours correcting algorithm).

H) total luminance value of measurement grey scale signal correspondence utilizes to deduct white section corresponding XYZ value of each screen, obtains RGB XYZ value.

I) with rgb value substitution decoupling zero equation and desired value contrast.

J) if identical the DCC value of adjusting is deposited in the DCC look-up table.

K) finish after three sampled point computings, remaining function point uses Gamma curve fitting algorithm to produce, insert in the Gamma table.

2, hardware signal is handled structure

The GTG zero offset capability is made up of automatically switch algorithm, the automatic correcting algorithm of GTG, Gamma curve fitting algorithm of Gamma.

As shown in Figure 6, Gamma automatic switchover algorithm is realized in the FPGA of control system, utilizes Min (R, G, B) function comparator, and signal is detected.If all movements use same Gamma checking list in the time of white section useless, but movement will use white section Gamma checking list to carry out colour temperature, brilliance control when adding for white section.So just can guarantee the consistency of R, G, B, C, Y, M, while GTG colour temperature is may command also.Concrete structure is as follows:

A) rgb signal is input to the two groups of data after the correction that obtain of two groups of Gamma look-up tables.

B) data after will proofreading and correct are input to and obtain in Min (RGB) comparator, and Min (RGB) comparator is monitored monochromatic Gamma correction data, if the white section of output Gamma correction data when data surpass set point, otherwise would export monochromatic Gamma correction data.

The automatic correcting algorithm of GTG, Gamma curve fitting algorithm are realized by the software in the PC.

Below probe system and probe automatic station-keeping system are described:

The colourity probe system:

As shown in Figure 7, the colourity probe system uses Color Sensor (color sensor) as detecting core component.The original dateout of probe meets three values of XYZ of CIE-1931 standard, by phototiming circuit and de-twitter circuit, analog output signal is converted into digital signal through 10Bit ADC high-speed sampling, and be XYZ by the algorithmic transformation of single-chip microcomputer, convert Yxy, color temperature value to through the numerical value transfer algorithm, output to the outside by infrared interface.

In colourity probe system circuit, use the colourity probe of simulation XYZ signal output, signal output back uses high power amplification coefficient discharge circuit that signal is amplified, wave circuit is input to the signal noise filtering in the A/D conversion and carries out the signal digital-to-analogue conversion after filtration then, and data are passed to MCU.

It is data communication that infrared receiver transmitter possesses one of two function, and another is synchronizing signal output.The signal of output is passed to MCU synchronously, and MCU samples to the A/D modular converter according to this synchronizing signal, so just can produce more stable measurement numerical value.

XYZ numerical value is changed into Yxy and color temperature signal outputs to display system by infrared receiver transmitter at the MCU internal processes.

The probe sampling algorithm:

As Fig. 7, the probe sampling algorithm refers in the colourity probe system and " removes the extreme mean filtering algorithm " in the MCU, is " Yxy " and " colour temperature " data with the XYZ data conversion then, is a kind of data analysis algorithm.

Sampling makes and spends the extreme mean filtering algorithm and finish data acquisition, obtains a more stable XYZ optical signalling value then, then the XYZ conversion of signals is become the output of Yxy signal and color temperature signal.

The probe automatic station-keeping system:

As shown in Figure 8, the probe automatic station-keeping system is used track structure, uses stepping motor to carry out motion control, can use software set, the test point coordinate of each screen.

After software sent the coordinate instruction, probe system ran to the target location automatically, and the target location comprises X transverse axis coordinate, Y ordinate of orthogonal axes.

As shown in Figure 9, use optical rotary encoder that X-axis, Y-axis distance are monitored at probe automatic station-keeping system circuit.Circuit for controlling motor uses the special-purpose integrated realization of step motor control.

After PC software sent position command, MCU at first controlled X-axis, utilized the data of optical rotary encoder output X-axis to monitor, and saw whether arrive the target location, arrived just to stop the stepping motor operation; MCU controls Y-axis again, utilizes the data of optical rotary encoder output Y-axis to monitor, and sees whether arrive the target location, arrives just to stop stepping motor operation, the location of finishing probe system.

The flow process of the method for present embodiment is:

1. probe system is located automatically

The probe automatic station-keeping system possesses automatic motion structure, and after software sent the coordinate instruction, probe system ran to the target location automatically, and the target location comprises X transverse axis coordinate, Y ordinate of orthogonal axes.

2. artificial details in a play not acted out on stage, but told through dialogues adjustment

Manual type is adjusted the details in a play not acted out on stage, but told through dialogues coefficient, the solid colour of each optical projection system when to make input signal be black entirely.Because the light leak characteristic has determined black signal when input picture to also have half-light, but the inconsistent half-light color that causes of the optical property of every display device is inconsistent in system.

3. carry out the DCC zero offset capability

DCC zero offset capability, the colour triangle that many display devices of splice displaying system are different are automatically adjusted becomes unanimity, makes to beat that each picture color is consistent under R, G, B, C, Y, the M monochrome.

4. artificial brightness fine setting

After the DCC zero offset capability is finished, since screen angle of visibility difference, the difference of probe system and human eye characteristic, the color that causes the DCC zero offset capability to adjust out, the people glances up and also has small inconsistent phenomenon.So just must use the brightness fine adjustment function to carry out the brightness fine setting.

5. carry out the GTG zero offset capability

Gamma automatic switchover module solves image semi-tone, and it is controlling the intermediate level of picture, proofreaies and correct the non-linear display characteristic of display, the special phenomenon that solves the system's GTG colour temperature drift that contains white section.

6. artificial gamma curve fine setting

Because screen angle of visibility difference, the difference of probe system and human eye characteristic makes the GTG of each screen that difference be arranged, and the gamma curve of fine setting PC software is revised the gamma curve that the GTG zero offset capability produces, and makes whole wall, the more level and smooth unanimity of GTG.

Claims (10)

1, a kind of color management system for mixed connection wall is characterized in that: PC is undertaken interconnected by interface system and display system, and PC is interconnected with the probe automatic station-keeping system by interface system; Described probe automatic station-keeping system is provided with the colourity probe system; Also be provided with control system in the display system.

2, color management system for mixed connection wall as claimed in claim 1 is characterized in that described control system is by forming with lower module:

(a) Gamma automatic switchover module, be used to solve image semi-tone, the intermediate level of control photo, proofread and correct the non-linear display characteristic of display, solution contains the phenomenon of system's GTG colour temperature drift of white section, use two cover Gamma curve look-up table in the Gamma automatic switchover module, utilize special purpose function signal to be judged and the two cover Gamma curve look-up table that automatically switch;

(b) DCC matrix processing module, the monochromatic inconsistent phenomenon of resolution system R, G, B, DCC matrix processing module is handled picture signal, uses 3 * 3 coefficient matrix to carry out computing in the module, obtains a new signal value again; Its optical principle is that the colour triangle adjustment that many display devices of display system are different becomes unanimity;

(c) static DIFFUSION TREATMENT module, static diffuse module are used for the display gray scale of display device is improved more than the 2bit; Signal after static diffuse module diffusion will be delivered to display device and show.

3, color management system for mixed connection wall as claimed in claim 1 is characterized in that: described colourity probe system uses color sensor as detecting core component; The original dateout of probe meets three values of XYZ of CIE-1931 standard, by phototiming circuit and de-twitter circuit, analog output signal is converted into digital signal through 10Bit ADC high-speed sampling, and be XYZ by the algorithmic transformation of single-chip microcomputer, convert Yxy, color temperature value to through the numerical value transfer algorithm, export by infrared interface.

4, color management system for mixed connection wall as claimed in claim 1 is characterized in that: described probe automatic station-keeping system is used track structure, uses stepping motor to carry out motion control, uses the test point coordinate of each screen of software set.

5, color management system for mixed connection wall as claimed in claim 1 is characterized in that: described interface system is realized the function of instruction transformation and communication, is responsible for converting the control command of PC system to display system receptible control command.

6, color management system for mixed connection wall as claimed in claim 1 is characterized in that: described probe automatic station-keeping system is controlled by interface, and the delivery probe system is done whole wall test action in display system.

7, color management system for mixed connection wall as claimed in claim 1 is characterized in that: described probe system is responsible for gathering the light signal of display system.

8, color management system for mixed connection wall as claimed in claim 1 is characterized in that: described PC system is responsible for moving the automatic correcting algorithm of GTG, the automatic correcting algorithm of DCC.

9, a kind of control method of color management system for mixed connection wall is characterized in that comprising the step of following order:

(a) probe system is located automatically;

(b) artificial details in a play not acted out on stage, but told through dialogues adjustment;

(c) carry out the DCC zero offset capability;

(d) artificial brightness fine setting;

(e) carry out the GTG zero offset capability;

(f) artificial Gamma curve fine setting.

10, a kind of control method of color management system for mixed connection wall as claimed in claim 9 is characterized in that reaching the effect needs of adjusting color and realizes by the following method:

Show that output equation and DCC algorithm, three algorithms of the automatic correcting algorithm of DCC cooperate the primary colours consistency problem that solves display system; The automatic correcting algorithm of GTG solves GTG smoothness, colour temperature consistency, Bai Chang, details in a play not acted out on stage, but told through dialogues correction problem; Static DIFFUSION TREATMENT algorithm is to promote the color expressive ability to make GTG excessively more level and smooth;

(a) show that output equation is:

$\left[\begin{array}{c}X\\ Y\\ Z\end{array}\right]=\left[\begin{array}{ccc}{r}_1& g_1& b_1\\ r_2& g_2& b_2\\ r_3& g_3& b_3\end{array}\right]\·\left[\begin{array}{c}\mathrm{RR}\\ \mathrm{RG}\\ \mathrm{RB}\end{array}\right]$

Wherein, r, g, b are proportionality constant;

(b) DCC algorithm:

$\left[\begin{array}{c}{Y}_R\\ Y_G\\ Y_B\end{array}\right]=\left[\begin{array}{ccc}\mathrm{RR}& \mathrm{GR}& \mathrm{BR}\\ \mathrm{RG}& \mathrm{GG}& \mathrm{BG}\\ \mathrm{RB}& \mathrm{GB}& \mathrm{BB}\end{array}\right]\·\left[\begin{array}{c}{X}_R\\ X_G\\ X_B\end{array}\right]$

Wherein, X _R, X _G, X _B: be the RGB channel signal of 10 bits,

RR, GG, BB, RG, RG, GB, GR, BR, BG: dominant hue integral coefficient.Y _R, Y _G, Y _B: rgb signal output;

(c) the automatic correcting algorithm of DCC comprises the automatic correcting algorithm of DCC, artificial brightness fine setting algorithm:

(i) the automatic correcting algorithm of DCC is a kind of pid control algorithm, uses the control of PID controller in color control, realizes that PID control must carry out decoupling zero to it earlier, and according to the difference of demonstration input and output equation, and the decoupling zero function, the PID controller parameter is adjustable;

The decoupling zero matrix:

$\left[\begin{array}{c}{X}_L\\ Y_L\\ Z_L\end{array}\right]=\left[\begin{array}{ccc}{X}_r& X_g& X_b\\ Y_r& Y_g& Y_b\\ Z_r& Z_g& Z_b\end{array}\right]\×\left[\begin{array}{c}R\\ G\\ B\end{array}\right]$

Wherein, X _L, Y _L, Z _LBe input optical signal, X _rY _rZ _r, X _gY _gZ _g, X _bY _bZ _bBe red, green, blue section output XYZ output signal; R, G, B are the allocation proportion coefficient;

Digital PID Controller:

Use the increment type PID control algolithm;

(ii) artificial brightness fine setting algorithm will all multiply by a fine setting parameter from the good DCC parameter of dynamic(al) correction;

(d) the automatic correcting algorithm of GTG comprises: Gamma automatic switchover algorithm, the automatic correcting algorithm of GTG, Gamma curve fitting algorithm;

(i) Gamma automatic switchover algorithm: utilize Min (R, G, B) function comparator, signal is detected; Movement can use monochromatic Gamma checking list in the time of white section useless, and colour temperature, brightness are controlled; Movement will use white section Gamma checking list when having white section to add, and colour temperature, brightness are controlled;

The (ii) automatic correcting algorithm of GTG:

The decoupling zero matrix:

$\left[\begin{array}{c}{X}_L\\ Y_L\\ Z_L\end{array}\right]=\left[\begin{array}{cccc}{X}_r& X_g& X_b& X_w\\ Y_r& Y_g& Y_b& Y_w\\ Z_r& Z_g& Z_b& Z_w\end{array}\right]\×\left[\begin{array}{c}R\\ G\\ B\end{array}\right]$

Wherein, X _L, Y _L, Z _LBe input optical signal, X _rY _rZ _r, X _gY _gZ _g, X _bY _bZ _b, X _wY _wZ _wBe red, green, blue, white section output XYZ output signal; R, G, B are the allocation proportion coefficient;

Digital PID Controller:

Use the increment type PID control algolithm;

(iii) Gamma curve fitting algorithm: use the cubic polynomial interpolation algorithm of one dimension to realize;

(e) static DIFFUSION TREATMENT algorithm:

Static spatial diffusion module carries out the 10bit signal of adder output to become the 8bit signal after the three-dimensional diffusion respectively, delivers to the corresponding input port of display device then behind output buffer.RGB output enable register is controlled R-G-B signals respectively, if certain output enable register is a logical one, then the passage of corresponding color is exported the signal after spatial diffusion, otherwise exports 0;

(f) probe sampling algorithm:

Sampling makes and spends the extreme mean filtering algorithm and finish data acquisition, obtains a more stable XYZ optical signalling value then, then the XYZ conversion of signals is become the output of Yxy signal and color temperature signal.

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