CN103974050A - Single-machine multi-channel projection synchronizing method - Google Patents

Abstract

The invention provides a single-machine multi-channel projection synchronizing method, and belongs to the technical field of image processing. The method comprises the steps that A, the physical quantities of display areas of screens corresponding to K channels are obtained; B, a control machine receives image data to be projected, data fusion and correction are carried out on the image data, and the image data are allocated to projectors of the display channels according to a time sequence; C, the projector of each channel sends a feedback signal to the control machine after receiving the image data sent by the control machine; D, the control machine receives the feedback signals of all the projectors and generates control signals, and the control signals are sent to the projectors of the channels at the same time; E, after the projectors of the channels receive the control signals, driving signals are sent out to enable the received fused and corrected image data to be converted into light signals and be projected to the corresponding display areas. According to the method, projected images can be displayed in a seamless mode.

Description

Unit multichannel Projective Synchronization method

Technical field

The present invention relates to a kind of unit multichannel Projective Synchronization method, belong to display control technology field.

Background technology

The projection of unit multichannel is when realizing multiple projection, synchronously carry out projection, and the content of can the projection different scene of each projecting apparatus so greatly improves the amount of information that shows, expanded FOV.Along with the reduction of unit multichannel shadow casting technique hardware threshold and the maturation of software engineering, increasing unit, individual and industry are brought into use multihead display platform, and wherein there is good application prospect in unit multichannel shadow casting technique in fields such as VGE, digital city, city or garden landscape planning and designing, the emulation of military battlefield, visual forest management and administration, soil erosion sight dynamic analogs.

But unit multichannel Projective Synchronization method of the prior art, be difficult to synchronous, the image of multiple projecting apparatus projections the time can not simultaneous display Same Scene image.

Brief description of the drawings

For overcoming the shortcoming existing in prior art, goal of the invention of the present invention is to provide a kind of unit multichannel Projective Synchronization method, and it can make projected image seamless display.

For realizing described goal of the invention, the invention provides a kind of unit multichannel Projective Synchronization method and comprise step:

A, obtain the physical quantity of the viewing area of the screen that in K passage, each passage is corresponding;

B, controller receive until projecting image data view data are carried out, after data fusion rectification, being assigned to chronologically the projector of each display channel;

The projector of C, each passage sends after view data receiving controller, sends one and feeds back signal to controller;

D, controller generate control signal after receiving the feedback signal of all projectors; Then control signal is sent to simultaneously to the projector of each passage;

The projector of E, each passage receives after described control signal, sends and drives signal so that the view data after received fusion rectification is converted to light signal and projects to corresponding viewing area.

Preferably, view data is carried out to data fusion rectification, it comprises:

B-1: (m+1) × (n+1) individual control point is evenly set on the network image of k institute of projector projection, adjust the coordinate at each control point so that observer observes normal perspective projection image on projection screen, record the coordinate figure after each control point is adjusted wherein, a _k∈ [0,1,2 ..., m], b _k∈ [0,1,2 ..., n];

B-2: the coordinate figure after adjusting according to each control point structural deformation function Q (i, j), treats projected image according to function Q (i, j) and is out of shape, and wherein, i and j are respectively the row and column of the pixel (i, j) for the treatment of in projected image.

Compared with prior art, a kind of unit multihead display synchronous method provided by the invention can make projected image seamless display.

Brief description of the drawings

Fig. 1 is the composition frame chart of unit multichannel optical projection system provided by the invention;

Fig. 2 is the flow chart of unit multichannel Projective Synchronization method provided by the invention;

Fig. 3 is the flow chart that multi-channel data provided by the invention merges antidote.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, the invention will be further described.

Fig. 1 is the composition frame chart of unit multi-channel system provided by the invention; As shown in Figure l, unit multi-channel system provided by the invention comprises a control computer, screen, and n platform projector, control computer and be responsible for the data of accepting to transmit on network, and data is played up accordingly, finally show by projector; Described screen is ring curtain, arc curtain, ball curtain etc.

Fig. 2 is the flow chart of unit multi-channel synchronous method provided by the invention.As shown in Figure 2, unit multihead display synchronous method provided by the invention comprises:

A, obtain the physical quantity of the viewing area of the screen that in K passage, each passage is corresponding;

B, controller (computer) receive until projecting image data view data are carried out, after data fusion rectification, being assigned to chronologically the projector of each display channel;

The projector of C, each passage sends after view data receiving controller, sends one and feeds back signal to controller;

D, controller generate control signal after receiving the feedback signal of all projectors; Then control signal is sent to simultaneously to the projector of each passage;

The projector of E, each passage receives after described control signal, sends and drives signal so that the view data after received fusion rectification is converted to light signal and projects to corresponding viewing area.

Fig. 3 is the flow chart that the invention provides multi-channel data fusion antidote.As shown in Figure 3, multi-channel data fusion method provided by the invention comprises:

Multi-channel data provided by the invention merges antidote and comprises:

S01: in same level, 3 projectors are set, even their composition a line | A ₁₁a ₁₂a ₁₃|

S02: projection screen horizontal bar is divided into 3 regions;

S03: make a projector corresponding to a region and make equally spaced grid image of each projector projection, 8 × 8 pixels of each grid correspondence;

S04: make k=1,

S05: (m+1) × (n+1) individual control point is evenly set on the network image of k institute of projector projection, adjust the coordinate at each control point so that observer observes normal perspective projection image on projection screen, the coordinate figure after record controls point is adjusted wherein, a _k∈ [0,1,2 ..., m], b _k∈ [0,1,2 ..., n];

S06: the coordinate figure after adjusting according to each control point structural deformation function Q (i, j), treats projected image according to function Q (i, j) and is out of shape, and wherein, i and j are respectively the residing row and column of the pixel (i, j) for the treatment of in projected image, are specially:

If it is 3H × W that a width is treated the resolution of projected image, k projector treats that the resolution of projected image is wherein, P is that the adjacent Liang Ge of level projector treats the columns of the overlapping region of projected image, and warping function is:

$Q(i,j)=\underset{a_k=0}{\overset{m}{\mathrm{\Σ}}}\underset{b_k=0}{\overset{n}{\mathrm{\Σ}}}{P}_{a_k,b_k}{B}_{a_k}^m\left(i\right)B_{b_k}^n\left(j\right),$ Wherein, $B_{a_k}^m\left(i\right)=C_m^{a_k}{\left[\frac{i}{W}\right]}^{a_k}\·{[1-\frac{i}{W}]}^{m-a_k},$ $B_{b_k}^n\left(j\right)=C_n^{b_k}{\left[\frac{j+(k-1)P}{k(H+\frac{2P}{3})}\right]}^{b_k}{\·[1-\frac{j+(k-1)P}{k(H+\frac{2P}{3})}]}^{n-b_k}$

S07: make k+1, and assignment is to k;

S08: judge whether k is greater than K, if so, carry out Fusion Edges, otherwise return to S05.Fusion Edges is adopted with the following method and is carried out: make to treat of projected image corresponding to the 1st projector row are to the fusion function f (j) is multiplied by the brightness of row pixel; Make to treat of projected image corresponding to the 2nd projector row are to the fusion function 1-f (j) is multiplied by the brightness of row pixel, the row are to the fusion function g (j) is multiplied by the brightness of row pixel; Make to treat of projected image corresponding to the 3rd projector row are to the fusion function 1-g (j) is multiplied by the brightness of row pixel;

Wherein, described fusion function f (j) is:

$f\left(j\right)=\left\{\begin{array}{cc}\mathrm{\α}{(2\·\frac{j-H+\frac{P}{3}}{P})}^p& H-\frac{P}{3}\≤j\≤H+\frac{P}{6}\\ 1-\mathrm{\α}{\left[2(1-\frac{j-H+\frac{P}{3}}{P})\right]}^p& H+\frac{P}{6}\≤j\≤H+\frac{2P}{3}\end{array}\right.,$

Described fusion function g (j) is:

$g\left(j\right)=\left\{\begin{array}{cc}\mathrm{\α}{(2\·\frac{j-2H+\frac{2P}{3}}{P})}^p& 2H-\frac{2P}{3}\≤j\≤2H-\frac{P}{6}\\ 1-\mathrm{\α}{\left[2(1-\frac{j-2H+\frac{2P}{3}}{P})\right]}^p& 2H+\frac{P}{6}\≤j\≤2H+\frac{P}{3}\end{array}\right.$

Wherein, α is brightness regulation coefficient, α ∈ [0,1], and p is factor of influence, it is positive integer.

Preferably, m=3, n=3.

Although the present invention is illustrated as example to be horizontally disposed with 3 projectors, the present invention also can vertically arrange two or more projector, and when two projectors are vertically set, multi-channel data fusion method comprises:

S01: at same vertical plane, 2 projectors are set, even if they form two row $\left|\begin{array}{c}{A}_{11}\\ A_{21}\end{array}\right|$

S02: projection screen vertical division is become to 2 regions;

S03: make a projector corresponding to a region and make equally spaced grid image of each projector projection, 8 × 8 pixels of each grid correspondence;

S04: make k=1,

S05: (m+1) × (n+1) individual control point is evenly set on the network image of k institute of projector projection, adjust the coordinate at each control point so that observer observes normal perspective projection image on projection screen, the coordinate figure after record controls point is adjusted wherein, a _k∈ [0,1,2 ..., m], b _k∈ [0,1,2 ..., n];

S06: the coordinate figure after adjusting according to each control point structural deformation function Q (i, j), treats projected image according to function Q (i, j) and is out of shape, and wherein, i and j are respectively the residing row and column of the pixel (i, j) for the treatment of in projected image, are specially:

If it is H × 2W that a width is treated the resolution of projected image, k projector treats that the resolution of projected image is wherein, R is that neighbouring Liang Ge projector treats the line number of the overlapping region of projected image;

Adopt following formula that the coordinate (i, j) of the pixel that is positioned at the capable j row of i is transformed to Q (i, j):

$Q(i,j)=\underset{a_k=0}{\overset{m}{\mathrm{\Σ}}}\underset{b_k=0}{\overset{n}{\mathrm{\Σ}}}{P}_{a_k,b_k}{B}_{a_k}^m\left(i\right)B_{b_k}^n\left(j\right),$ Wherein,

$B_{a_k}^m\left(i\right)=C_m^{a_k}{\left[\frac{i+(k-1)R}{k(W+\frac{R}{2})}\right]}^{a_k}\·{[1-\frac{i+(k-1)R}{k(W+\frac{R}{2})}]}^{m-a_k},B_{b_k}^n\left(j\right)=C_n^{b_k}{\left[\frac{j}{H}\right]}^{b_k}\·{[1-\frac{j}{H}]}^{n-b_k};$

S07: make k+1, and assignment is to k;

S08: judge whether k is greater than 2, if so, carry out Fusion Edges, otherwise return to S05;

Fusion Edges is adopted with the following method and is carried out: make corresponding to of the projected image of the 1st projector to fusion function h (i) is multiplied by the brightness of row pixel;

Make to treat of projected image corresponding to the 2nd projector to fusion function 1-h (i) is multiplied by the brightness of row pixel;

Described fusion function h (i) is:

$h\left(i\right)=\left\{\begin{array}{cc}\mathrm{\α}{(2\·\frac{i-W+\frac{R}{2}}{R})}^p& W-\frac{R}{2}\≤i\≤W\\ 1-\mathrm{\α}{\left[2(1-\frac{i-H+\frac{R}{2}}{R})\right]}^p& W\≤i\≤W+\frac{R}{2}\end{array}\right.$

Wherein, α is brightness regulation coefficient, α ∈ [0,1], and p is factor of influence, it is positive integer.

The present invention also can arrange six projectors, and six projectors are arranged to two row three row, and to adapt to more complicated projection screen as ball curtain, this multi-channel data fusion method comprises:

S01: make six projectors form two row three row, $\left|\begin{array}{ccc}{A}_{11}& A_{12}& A_{13}\\ A_{21}& A_{22}& A_{23}\end{array}\right|$

S02: projection screen is divided into 6 regions;

S03: make a projector corresponding to a region and make equally spaced grid image of each projector projection, 8 × 8 pixels of each grid correspondence;

S04: make k=1,

S05: (m+1) × (n+1) individual control point is evenly set on the network image of k institute of projector projection, adjust the coordinate at each control point so that observer observes normal perspective projection image on projection screen, the coordinate figure after record controls point is adjusted wherein, a _k∈ [0,1,2 ..., m], b _k∈ [0,1,2 ..., n];

S06: the coordinate figure after adjusting according to each control point structural deformation function Q (i, j), treats projected image according to function Q (i, j) and is out of shape, and wherein, i and j are respectively the residing row and column of the pixel (i, j) for the treatment of in projected image, are specially:

If it is 3H × 2W that a width is treated the resolution of projected image, k projector treats that the resolution of projected image is wherein, R is that neighbouring Liang Ge projector treats the line number of the overlapping region of projected image; P is that the adjacent Liang Ge of level projector treats the columns of the overlapping region of projected image;

Adopt following formula that the coordinate (i, j) of the pixel that is positioned at the capable j row of i is transformed to Q (i, j):

$Q(i,j)=\underset{a_k=0}{\overset{m}{\mathrm{\Σ}}}\underset{b_k=0}{\overset{n}{\mathrm{\Σ}}}{P}_{a_k,b_k}{B}_{a_k}^m\left(i\right)B_{b_k}^n\left(j\right),$ Wherein,

$B_{a_k}^m\left(i\right)=C_m^{a_k}{\left[\frac{i+(k-1)R}{k(W+\frac{R}{2})}\right]}^{a_k}\·{[1-\frac{i+(k-1)R}{k(W+\frac{R}{2})}]}^{m-a_k},$

$B_{b_k}^n\left(j\right)=C_n^{b_k}{\left[\frac{j+(k-1)P}{k(H+\frac{2P}{3})}\right]}^{b_k}{\·[1-\frac{j+(k-1)P}{k(H+\frac{2P}{3})}]}^{n-b_k};$

S07: make k+1, and assignment is to k;

S08: judge whether k is greater than 6, if so, carry out Fusion Edges, otherwise return to S05;

Fusion Edges is adopted with the following method and is carried out: make corresponding to the 1st A of projector ₁₁projected image to fusion function h (i) is multiplied by the brightness of row pixel; The to fusion function f (j) is multiplied by the brightness of row pixel;

Make corresponding to the 4th A of projector ₂₁treat of projected image to fusion function 1-h (i) is multiplied by the brightness of row pixel; The to fusion function f (j) is multiplied by the brightness of row pixel.

Make corresponding to the 2nd A of projector ₁₂projected image to fusion function h (i) is multiplied by the brightness of row pixel; The to fusion function 1-f (j) is multiplied by the brightness of row pixel; The to fusion function g (j) is multiplied by the brightness of row pixel;

Make corresponding to the 5th A of projector ₂₂treat of projected image to fusion function 1-h (i) is multiplied by the brightness of row pixel; The to fusion function 1-f (j) is multiplied by the brightness of row pixel; The to fusion function g (j) is multiplied by the brightness of row pixel.

Make corresponding to the 3rd A of projector ₁₃projected image to fusion function h (i) is multiplied by the brightness of row pixel; The to fusion function 1-g (j) is multiplied by the brightness of row pixel;

Make corresponding to the 6th A of projector ₂₃treat of projected image to fusion function 1-h (i) is multiplied by the brightness of row pixel; The to fusion function 1-g (j) is multiplied by the brightness of row pixel;

Described fusion function f (j) is:

$f\left(j\right)=\left\{\begin{array}{cc}\mathrm{\α}{(2\·\frac{j-H+\frac{P}{3}}{P})}^p& H-\frac{P}{3}\≤j\≤H+\frac{P}{6}\\ 1-\mathrm{\α}{\left[2(1-\frac{j-H+\frac{P}{3}}{P})\right]}^p& H+\frac{P}{6}\≤j\≤H+\frac{2P}{3}\end{array}\right.,$

Described fusion function g (j) is

$g\left(j\right)=\left\{\begin{array}{cc}\mathrm{\α}{(2\·\frac{j-2H+\frac{2P}{3}}{P})}^p& 2H-\frac{2P}{3}\≤j\≤2H-\frac{P}{6}\\ 1-\mathrm{\α}{\left[2(1-\frac{j-2H+\frac{2P}{3}}{P})\right]}^p& 2H+\frac{P}{6}\≤j\≤2H+\frac{P}{3}\end{array}\right.$

Described fusion function h (i) is:

$h\left(i\right)=\left\{\begin{array}{cc}\mathrm{\α}{(2\·\frac{i-W+\frac{R}{2}}{R})}^p& W-\frac{R}{2}\≤i\≤W\\ 1-\mathrm{\α}{\left[2(1-\frac{i-H+\frac{R}{2}}{R})\right]}^p& W\≤i\≤W+\frac{R}{2}\end{array}\right.$

Wherein, α is brightness regulation coefficient, α ∈ [0,1], and p is factor of influence, it is positive integer.

Although the present invention is to be horizontally disposed with three projectors, Liang Ge projector is vertically set, and two the form that is listed as of row three 6 projectors be set be illustrated, the present invention is not limited to this several situations, the present invention can rectangularly arrange multiple projectors to adapt to different projection screens.

More than be described with reference to the accompanying drawings basis bright, but the present invention should not be considered to only be confined to above-mentioned specific embodiment, and be interpreted as containing the of the present invention all aspects that propose in appended claims.Multiple amendment to the present invention's application in the situation that of the above-mentioned specification of reading, equivalent processes and various structures it will be apparent to those skilled in the art that.

Claims (2)

1. a unit multichannel Projective Synchronization method, comprises step:

A, obtain the physical quantity of the viewing area of the screen that in K passage, each passage is corresponding;

B, controller receive until projecting image data view data are carried out, after data fusion rectification, being assigned to chronologically the projector of each display channel;

The projector of C, each passage sends after view data receiving controller, sends one and feeds back signal to controller;

D, controller generate control signal after receiving the feedback signal of all projectors; Then control signal is sent to simultaneously to the projector of each passage;

The projector of E, each passage receives after described control signal, sends and drives signal so that the view data after received fusion rectification is converted to light signal and projects to corresponding viewing area.

2. unit multichannel Projective Synchronization method according to claim 1, is characterized in that, view data is carried out to data fusion rectification and comprise:

B-1: (m+1) × (n+1) individual control point is evenly set on the network image of k institute of projector projection, adjust the coordinate at each control point so that observer observes normal perspective projection image on projection screen, record the coordinate figure after each control point is adjusted wherein, a _k∈ [0,1,2 ..., m], b _k∈ [0,1,2 ..., n];

B-2: the coordinate figure after adjusting according to each control point structural deformation function Q (i, j), treats projected image according to function Q (i, j) and is out of shape, and wherein, i and j are respectively the row and column of the pixel (i, j) for the treatment of in projected image.