CN106162006A - A kind of video camera automatically adjusts the method for mosaic screen chroma-luminance - Google Patents

Abstract

The present invention is mainly by connecting RS232 port, initialize board information, full Mosaic screen shows full frame RGB (255, 255, 255) image, automatically the effective coverage image of full mosaic screen is gathered according to video camera, manually selecting one of them concatenation unit is standard splicing son screen, mode automatically or semi-automatically detects the summit of each concatenation unit, obtain each concatenation unit area image, then the average of RGB and HSI of each concatenation unit area image is calculated, send instruction by each concatenation unit of RS232 serial ports alignment, the form and aspect and the brightness that make each concatenation unit are unified.

Description

A kind of video camera automatically adjusts the method for mosaic screen chroma-luminance

Technical field

The present invention relates to the unified field of mosaic screen colour gamut, particularly mosaic screen colourity and brightness regulation Method

Background technology

Mosaic screen is a kind of to realize the very useful approach of large screen display.In actual life, large-size screen monitors Curtain is shown in business meetings, and lecture of imparting knowledge to students, advertising, industrial monitoring aspect is all widely used. Mainly having display quality high, high-resolution, bright in luster, low cost of manufacture, service life, length etc. was excellent Point.

Mosaic screen is the giant-screen utilizing multiple projecting cell to be spliced, owing to each projection splicing is single Otherness on making for the unit, causes big display screen to there will be the inconsistency of color and brightness.Generally Chroma-luminance instrument used in project, the otherness of illumination photometer measurement color and brightness, but this quasi-instrument Price comparison is expensive and be the test of contact.Another kind of adjustment method is that commissioning staff is with self Vision system is for weighing the instrument of color, and the chroma-luminance adjusting each concatenation unit is consistent, and this process is deposited In the subjectivity of individual vision system, process of simultaneously debugging is comparatively laborious, causes debugging process more multiple Miscellaneous.

Content of the invention

The present invention proposes a kind of method of fairly simple quick debugging mosaic screen colour brightness.

To achieve these goals, the present invention is by the following technical solutions:

A kind of video camera automatically adjusts the method for mosaic screen chroma-luminance, and full Mosaic screen shows full frame RGB The image of (255,255,255), automatically gathers the effective coverage image of full mosaic screen according to video camera, Manually selecting one of them concatenation unit is that standard splicing son screen mode automatically or semi-automatically detects each spelling The summit of order unit, it is thus achieved that each concatenation unit area image, then calculates each concatenation unit area image The average of RGB and HSI, send instruction by each concatenation unit of RS232 serial ports alignment, make each spelling The form and aspect of order unit and brightness are unified.

The present invention is to realize that port connects by RS232 Serial Port Line, sends instruction to each concatenation unit, can Recover Default Value, the display base map picture of each concatenation unit.Obtain in viewing area at video camera, Selected the summit in the full screen upper left corner and the lower right corner by left mouse button, thus it is complete automatically to obtain mosaic screen The effective coverage image of screen, then utilizes mouse to delimit in the artificial sub-screen image of standard selected One rectangular area, can identify the sequence number of this concatenation unit automatically in algorithm.Utilize the calculation of Corner Detection Method obtains the summit of each concatenation unit in full Mosaic screen automatically, in order to prevent flase drop, and missing inspection, weight Recheck the summit measuring, add artificial deleting summit and increase the operation calculation on summit in the process Method.According to the summit of each concatenation unit getting, automatically intercept away from each concatenation unit length a width of 10% Image as area image, obtain the average of RGB in each concatenation unit area image and the equal of HSI Value.Compared with the data with selected standard son screen by each concatenation unit, obtain value of chromatism, pass through The each concatenation unit of serial ports alignment of RS232 sends instruction and reduces aberration, repeat to realize to gather data- Analyzing value of chromatism-transmission and instructing this process, the colour brightness causing each concatenation unit is unified.

Brief description

Fig. 1 is the algorithm flow chart schematic diagram of the present invention；

Wherein: the full Mosaic screen of 1-shows full frame RGB (255,255,255) image, the full mosaic screen of 2- Effective coverage image, 3-standard splicing son screen, the summit of each concatenation unit of 4-, 5-each concatenation unit district Area image, 6-analyzes the value of chromatism of each concatenation unit and standard son screen, and 7-sends instruction code debugging automatically The board information of each concatenation unit.

Detailed description of the invention

Describe the present invention below in conjunction with the accompanying drawings:

Connect, by port to each concatenation unit as it is shown in figure 1, the present invention first sets up RS232 port Send instruction, initialize the board information of each concatenation unit, show that full screen is RGB (255,255,255) Image.After opening the preview mode of video camera, left by mouse in video camera display image area Key selectes the upper left corner of full screen and the point in the lower right corner, and these 2 rectangular areas constituting are considered as complete The effective coverage image of screen.By eye-observation, selecting one of them concatenation unit is standard son screen, The standard son screen and selected in the full screen effective coverage selected marks one by dragging mouse Individual rectangle frame, can identify the sequence number of this sub-screen automatically in program.

Automatically each concatenation unit is got at full screen effective coverage Program by Corner Detection Algorithm Summit, if the whole summits obtaining all concatenation units are correct and do not falsely drop, leakage choosing, weight Final election, then enter into the value of chromatism automatically calculating between each concatenation unit and standard son screen.If automatically Identify that the summit of concatenation unit is wrong, then need to do increase point by left mouse button or right button or delete point Operation, it is ensured that choosing is not falsely dropped, repeats and is leaked on the summit of all of concatenation unit, obtains all of All summits of concatenation unit.

By the summit of correct concatenation unit, intercept the image away from each concatenation unit length a width of 10% and make Area image for each concatenation unit, it is assumed that the length and width of area image are respectively w, h, can be got by camera Every some r in area image_ij, g_ij, b_ij(i≤w, j≤h), passes through $\stackrel{\‾}{r}=\frac{1}{w*h}\underset{i=1}{\overset{w}{\mathrm{\Σ}}}\underset{j=1}{\overset{h}{\mathrm{\Σ}}}{r}_{\mathrm{ij}},\stackrel{\‾}{g}=\frac{1}{w*h}\underset{i=1}{\overset{w}{\mathrm{\Σ}}}\underset{j=1}{\overset{h}{\mathrm{\Σ}}}{g}_{\mathrm{ij}},\stackrel{\‾}{b}=\frac{1}{w*h}\underset{i=1}{\overset{w}{\mathrm{\Σ}}}\underset{j=1}{\overset{h}{\mathrm{\Σ}}}{b}_{\mathrm{ij}},$ Obtain r in area image, the average of g, b.

Utilize the area image obtaining to be converted to HSI image, get every point in area image h_ij, s_ij, I_{I, j}(i≤w, j≤h), passes through $\stackrel{\‾}{h}=\frac{1}{w*h}\underset{i=1}{\overset{w}{\mathrm{\Σ}}}\underset{j=1}{\overset{h}{\mathrm{\Σ}}}{h}_{\mathrm{ij}},\stackrel{\‾}{s}=\frac{1}{w*h}\underset{i=1}{\overset{w}{\mathrm{\Σ}}}\underset{j=1}{\overset{h}{\mathrm{\Σ}}}{s}_{\mathrm{ij}},\stackrel{\‾}{I}=\frac{1}{w*h}\underset{i=1}{\overset{w}{\mathrm{\Σ}}}\underset{j=1}{\overset{h}{\mathrm{\Σ}}}{I}_{\mathrm{ij}}$ Get H in area image, the average of s, I.

Realizing automatically adjusting brightness and the color-values of each concatenation unit, because brightness is to be also to affect look One factor of degree, so by the brightness value obtaining each concatenation unit, searching minimum luminance value Concatenation unit sequence number N, the brightness value of relatively more each concatenation unit and the brightness value of serial number N, pass through RS232 Serial Port Line reduces the contrast value of other concatenation units, makes the brightness value phase of all concatenation units Seemingly, whole mosaic screen luminance proportion is reached.

Under conditions of brightness reaches equilibrium, calculate the average of the RGB of each concatenation unit, by region Image is converted to HSI image, contrasts with the colourity of chosen standard screen, passes through $\mathrm{\ϵ}=\sqrt{{(H_N-H_i)}^2+{(S_N-S_i)}^2+{(I_N-I_i)}^2}$ (wherein H_N, S_N, I_NFor selected standard screen tone value and Intensity value.S_i, H_i, I_iTone value and intensity value for each concatenation unit.ε is standard screen and each son Similarity between screen), as ε ＜ h (h is certain threshold value) it is considered that two kinds of color similarities.

In addition, got the RGB average of each concatenation unit by video camera, it is ideally R=G=B, by judging R_dis=R-M_min, G_dis=G-M_min, B_dis=B-M_min, (wherein R, G, B are The RGB average of each concatenation unit, M_minFor the minimum of a value in RGB, R_dis, G_dis, B_disFor rgb value with Difference between little value), if there is (R between difference_dis+G_dis+B_dis) ＜ 3, then it is assumed that sub-screen is not deposited In colour cast.

Circulation collection each concatenation unit number repeatedly is used during above-mentioned automatic debugging According to-analyze each concatenation unit and standard screen value of chromatism-transmission this process of instruction, cause each splicing single It is unified that the colour brightness of unit reaches equilibrium.

The present invention is automatically gathered the image of full Mosaic screen by video camera, completes debugging splicing automatically The color of screen and monochrome information, improve artificial debugging mosaic screen brightness and the unified efficiency of colourity, solve Determine the debugging process that redundant and complicated is complicated in debugging mosaic screen.

Claims (8)

1. a video camera automatically adjusts the method for mosaic screen chroma-luminance, it is characterised in that: connect RS232 port, initialization board information, full Mosaic screen show full frame RGB (255,255,255) Image (1), automatically gather the effective coverage image (2) of full mosaic screen according to video camera, manually select One of them concatenation unit fixed is standard splicing son screen (3), and mode automatically or semi-automatically detects each spelling The summit (4) of order unit, it is thus achieved that each concatenation unit area image (5), then calculates each concatenation unit The average (6) of RGB and HSI of area image, is sent by each concatenation unit of RS232 serial ports alignment Instruction (7), makes the form and aspect of each concatenation unit and brightness unified.

2. a video camera automatically adjusts the method for mosaic screen chroma-luminance, it is characterised in that: pass through mouse The constituted square in the upper left corner and 2, the lower right corner that spelling in display image area connects screen image is selected in mark left click Shape region is as the effective coverage of mosaic screen, and camera gathers full mosaic screen effective coverage image (2) automatically Interior data.

3. a video camera automatically adjusts the method for mosaic screen chroma-luminance, it is characterised in that: full frame In in curtain effective coverage image (2), the inside of one of them concatenation unit is pressed left mouse button and is dragged mouse Marking a rectangular area, this sub-screen is chosen as standard splicing son screen (3).

4. a video camera automatically adjusts the method for mosaic screen chroma-luminance, it is characterised in that: in shooting Full mosaic screen effective coverage image (2) that machine locks automatically is detected automatically by the algorithm of Corner Detection The summit (4) of each concatenation unit in mosaic screen area image.

5. a video camera automatically adjusts the method for mosaic screen chroma-luminance, it is characterised in that: automatically obtain The summit (4) getting each concatenation unit has identify right-on summit but due to external environment because of Element also has some points identifying mistake unavoidably, in order to prevent the summit getting each concatenation unit from existing Flase drop, missing inspection or duplicate detection, increase to the summit of concatenation unit by way of man-machine interaction With deletion function.

6. a video camera automatically adjusts the method for mosaic screen chroma-luminance, it is characterised in that: by from Dynamic or the semi-automatic summit (4) getting each concatenation unit intercepts each away from its concatenation unit length and width automatically The area image of 10%, as the area image (5) of each concatenation unit.

7. a video camera automatically adjusts the method for mosaic screen chroma-luminance, it is characterised in that: by tired Each some rgb value and HSI value in each concatenation unit area image of long-pending calculating, get each splicing single RGB and the HSI average (6) of area image in Yuan.

8. a video camera automatically adjusts the method for mosaic screen chroma-luminance, it is characterised in that: by taking the photograph Camera gets RGB and the HSI average (6) of each concatenation unit and standard splicing son screen (3) is carried out Relatively, obtain value of chromatism, send instruction (7) by each concatenation unit of RS232 serial ports alignment, reduce Value of chromatism, the colourity causing each concatenation unit is consistent with brightness, and the aberration brightness reaching mosaic screen is unified.