CN103281549A - Video deformation correcting method and system - Google Patents

Abstract

The invention provides a video deformation correcting method and a video deformation correcting system. The video deformation correcting method comprises the following steps that a video picture is divided and positioned by twelve B splines to form a shape of Chinese character ''tian''; each B spline can be separately regulated and moved, and a plurality of B splines can be provided with a common endpoint; and four equally divided parts of the shape of Chinese character ''tian'' are interpolated according to four B splines surrounded by the four equal parts to form subdivided interpolated B splines, and finally, the video picture is rendered and output. The video deformation correcting method and the video deformation correcting system have the beneficial effects that after the video deformation correcting method provided by the invention is adopted, a video can be well subjected to global and local deformation, and the problems of projection deformation, video alignment of left and right eyes, multi-video seamless splicing and the like of a 3D (three-dimensional) stereoscopic film can be well solved; and a real undeformed 3D movie effect is finally achieved, and a very good effect can be achieved in case of planar projection or cyclorama projection.

Description

Video distortion correction method and system

Technical field

The present invention relates to video image processing technology, relate in particular to video distortion correction method and system.

Background technology

When playing the 3D three-dimensional film, picture is that two width of cloth pictures of right and left eyes project in the same screen simultaneously.Produce best stereoeffect, the coincidence of will highly aliging of the picture of right and left eyes.But because traditional method is to align by the position of adjusting projecting apparatus, so be difficult to reach very high-precision alignment.If be projected on the arc curtain, that has alignd with regard to difficulty.

Summary of the invention

In order to solve the problems of the prior art, the invention provides a kind of video distortion correction method.

The invention provides a kind of video distortion correction method, video pictures is divided the location by 12 B-spline curves, forms a sphere of movements for the elephants type; Every B-spline curves can carry out independent adjustment and movement, and many B-spline curves have public end points; Divide part equally according to the interpolation B-spline curves that 4 B-spline curves of its encirclement carry out interpolation generation segmentation, at last video pictures is played up output for four of the sphere of movements for the elephants type.

As a further improvement on the present invention, comprise the steps:

A. 12 B-spline curves initialization of sphere of movements for the elephants type;

B.Direct3D Vertex summit initialization;

C. by adjusting the control point of B-spline curves, change the shape of B-spline curves;

D. according to the B-spline curves after adjusting, generate the interpolation B-spline curves;

E. according to the B-spline curves after adjusting, upgrade Direct3D Vertex summit space coordinates (x, y, z);

F.Direct3D plays up the output video picture.

As a further improvement on the present invention, four B-spline curves overlap from beginning to end, are combined into a hollow, and can make up expansion to hollow.

As a further improvement on the present invention, 3 clamped B-spline curves of B-spline curves employing, knot vector U={0,0,0,0,1,1,1,1}, four control point { P ₀, P ₁, P ₂, P ₃.

As a further improvement on the present invention, form two video pictures by two projectors.

The present invention also provides a kind of video distortion than positive system, and video pictures is divided the location by 12 B-spline curves, forms a sphere of movements for the elephants type; Every B-spline curves can carry out independent adjustment and movement, and many B-spline curves have public end points; Divide part equally according to the interpolation B-spline curves that 4 B-spline curves of its encirclement carry out interpolation generation segmentation, at last video pictures is played up output for four of the sphere of movements for the elephants type.

As a further improvement on the present invention, comprising:

The B-spline curves initialization module is used for 12 B-spline curves initialization of sphere of movements for the elephants type;

The summit initialization module is used for Direct3D Vertex summit initialization;

Adjusting module is used for changing the shape of B-spline curves by adjusting the control point of B-spline curves;

Generation module is used for generating the interpolation B-spline curves according to the B-spline curves after adjusting;

Update module is used for according to the B-spline curves after adjusting, and renewal Direct3D Vertex summit space coordinates (x, y, z);

Play up output module, be used for Direct3D and play up the output video picture.

As a further improvement on the present invention, four B-spline curves overlap from beginning to end, are combined into a hollow, and can make up expansion to hollow.

As a further improvement on the present invention, 3 clamped B-spline curves of B-spline curves employing, knot vector U={0,0,0,0,1,1,1,1}, four control point { P ₀, P ₁, P ₂, P ₃.

As a further improvement on the present invention, form two video pictures by two projectors.

The invention has the beneficial effects as follows: video distortion correction method provided by the invention, can be well carry out the overall situation and local distortion to video, the distortion of projection that can solve the 3D three-dimensional film well, the alignment of right and left eyes video, problem such as many videos are seamless spliced.No matter the final 3D film effect of realizing true nothing distortion is plane projection or the projection of arc curtain, can both reach extraordinary effect.

Description of drawings

Fig. 1 is video distortion correction method flow chart of the present invention.

Fig. 2 is the shape figure of B-spline curves of the present invention.

Fig. 3 is hollow B-spline curves figure of the present invention.

Fig. 4 is interpolation B batten figure of the present invention.

Fig. 5 is 12 B-spline curves figure of the present invention.

Fig. 6 is video distortion schematic diagram of the present invention.

Fig. 7 is the Direct3D of setting perspective matrix diagram of the present invention.

Fig. 8 is the initialization figure of 12 B-spline curves of the present invention.

Fig. 9 is 3D three-dimensional film perspective view of the present invention.

Figure 10 is of the present invention and inserts 1 interpolation B-spline curves.

Figure 11 is that the present invention has 2 interpolation B-spline curves figure.

Figure 12 is that the present invention has N bar interpolation B-spline curves figure.

Figure 13 is that the present invention has the another schematic diagram of N bar interpolation B-spline curves.

Figure 14 is texture coordinate figure schematic diagram of the present invention.

Figure 15 be the present invention for the 3D three-dimensional film, frame of video has comprised right and left eyes two width of cloth pictures.

Embodiment

The invention discloses a kind of video distortion correction method, video pictures is divided the location by 12 B-spline curves, forms a sphere of movements for the elephants type; Every B-spline curves can carry out independent adjustment and movement, and many B-spline curves have public end points; Divide part equally according to the interpolation B-spline curves that 4 B-spline curves of its encirclement carry out interpolation generation segmentation, at last video pictures is played up output for four of the sphere of movements for the elephants type.

As shown in Figure 1, video distortion correction method of the present invention comprises the steps: in step S1,12 B-spline curves initialization of sphere of movements for the elephants type; In step S2, Direct3D Vertex summit initialization; In step S3, by adjusting the control point of B-spline curves, change the shape of B-spline curves; In step S4, the B-spline curves according to after adjusting generate the interpolation B-spline curves; In step S5, according to the B-spline curves after adjusting, renewal Direct3D Vertex summit space coordinates (x, y, z); In step S6, Direct3D plays up the output video picture.

Article four, B-spline curves overlap from beginning to end, are combined into a hollow, and can make up expansion to hollow.

3 clamped B-spline curves of B-spline curves employing, knot vector U={0,0,0,0,1,1,1,1}, four control point { P ₀, P ₁, P ₂, P ₃.

Form two video pictures by two projectors.

The invention also discloses a kind of video distortion than positive system, video pictures is divided the location by 12 B-spline curves, forms a sphere of movements for the elephants type; Every B-spline curves can carry out independent adjustment and movement, and many B-spline curves have public end points; Divide part equally according to the interpolation B-spline curves that 4 B-spline curves of its encirclement carry out interpolation generation segmentation, at last video pictures is played up output for four of the sphere of movements for the elephants type.

This video distortion also comprises than positive system:

The B-spline curves initialization module is used for 12 B-spline curves initialization of sphere of movements for the elephants type;

The summit initialization module is used for Direct3D Vertex summit initialization;

Adjusting module is used for changing the shape of B-spline curves by adjusting the control point of B-spline curves;

Generation module is used for generating the interpolation B-spline curves according to the B-spline curves after adjusting;

Update module is used for according to the B-spline curves after adjusting, and renewal Direct3D Vertex summit space coordinates (x, y, z);

Play up output module, be used for Direct3D and play up the output video picture.

Video distortion correction method provided by the invention can be well be carried out the overall situation and local distortion to video, the distortion of projection that can solve the 3D three-dimensional film well, the alignment of right and left eyes video, problem such as many videos are seamless spliced.No matter the final 3D film effect of realizing true nothing distortion is plane projection or the projection of arc curtain, can both reach extraordinary effect.

This video distortion alignment technique is based on B-spline curves and is out of shape.B-spline curves can reach the distortion adjustment to picture easily by adjusting the control point.Left and right sides picture can be distinguished adjustment separately, can also carry out whole translation, convergent-divergent, rotation.And can preserve current distortion and be written into the distortion file.

The B spline base function:

If U is the set of m+1 non-decreasing number, u ₀＜=u ₂＜=u ₃＜=...＜=u _mu _iBe called node (knots), set U is called knot vector (knot vector), half open interval [u _i, u _I+1) be (knot span) between i node area.Note some u _iMay equate, can not exist between some node area.If node u _i(that is u, appears k time _i=u _I+1=...=u _I+k-1), k wherein〉1, u _iBe a multiplicity (multiplicity) for the multiplex node of k, be written as u _i(k).Otherwise, if u _iOnly occur once, it is a simple node.If node is (that is u, equidistantly _I+1-u _iBe a constant, to 0＜=i＜=m-1), knot vector or sequence node are called uniformly; Otherwise it is heterogeneous.

Node can be thought separation, with interval [u ₀, u _m] be subdivided between node area.All B-spline base functions are supposed that the domain of definition is at [u ₀, u _m] on.

In order to define the B-spline base function, we also need a parameter, the number of times of basic function (degree) p, and i p B-spline base function is written as N _{I, p}(u).

B spline base function recursive definition is as follows:

$N_{i,0}\left(u\right)=\left\{\begin{array}{cc}1& \mathrm{if}{u}_i\&le;u<u_{i+1}\\ 0& \mathrm{otherwise}\end{array}\right.---\left(1\right)$

$N_{i,p}\left(u\right)=\frac{u-u_i}{u_{i+p}-u_i}{N}_{i,p-1}\left(u\right)+\frac{u_{i+p+1}-u}{u_{i+p+1}-u_{i+1}}{N}_{i+1,p-1}\left(u\right)$

The B-spline curves definition:

Given n+1 control point P ₀, P ₁..., P _nWith a knot vector U={u ₀, u ₁..., u _m, p B-spline curve is by these control points and knot vector U definition.

$C\left(u\right)=\underset{i=0}{\overset{n}{\mathrm{\&Sigma;}}}{N}_{i,p}\left(u\right)P_i---\left(\text{2}\right)$

N wherein _{I, p}(u) be p B-spline base function, P _iBe the control point.

In the present invention, the B-spline curves parameter arranges as follows:

Get number of times (degree) p=3 of basic function.

Get knot vector number m+1=8, knot vector U={0,0,0,0,1,1,1,1}, 8 nodes, basic function domain of definition u gets [0,1].

Get control point P number n+1=4, { P ₀, P ₁, P ₂, P ₃, 4 control points.

So just form the Clamped B-spline curves 3 times, it is defined as:

$C\left(u\right)=\underset{i=0}{\overset{3}{\mathrm{\&Sigma;}}}{N}_{i,3}\left(u\right)P_i---\left(3\right)$

P _iI control point of 3 clamped B-spline curves of expression.I=0,1,2,3, P ₀, P ₁, P ₂, P ₃, totally 4 control points.

N _{I, 3}(u) i 3 B spline base functions of expression.I=0,1,2,3, totally 43 B spline base functions.

That is:

$C\left(u\right)=\underset{i=0}{\overset{3}{\mathrm{\&Sigma;}}}{N}_{i,3}\left(u\right)P_i={\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="HDA00003229714500061.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{0,3}}\left(u\right){\mathrm{<figure-callout\; id="0"\; label="P"\; filenames="HDA00003229714500061.png"\; state="\{\{state\}\}">P</figure-callout>}}_0+{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="HDA00003229714500061.png,HDA00003229714500092.png"\; state="\{\{state\}\}">N</figure-callout>}}_{\mathrm{1,3}}\left(u\right){\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="HDA00003229714500061.png,HDA00003229714500092.png"\; state="\{\{state\}\}">P</figure-callout>}}_1+N_{\mathrm{2,3}}\left(u\right)P_2+N_{\mathrm{3,3}}\left(u\right)P_3---\left(4\right)$

By formula (4) as can be known, 3 clamped B-spline curves, fully by four control point P0, P1, P2, P3 are definite fully.

The Clamped B-spline curves are fully by four control point P0, P1, and P2, P3 are definite fully, and two control point P of curve negotiating head and the tail ₀And P ₃, the head of curve and limit P ₀P ₁Tangent, afterbody and limit P ₂P ₃Tangent.

As shown in Figure 2, general modification control point { P ₀, P ₁, P ₂, P ₃The position, can control the shape of B-spline curves.

The sampled point of B-spline curves:

The meaning of the sampled point of curve refers to get a little at curve, and the every bit on the curve all is one of them sampled point.When u gets arbitrary numerical value u between [0,1] _iThe time, functional value C (u all can be arranged _i) corresponding with it.C (u _i) be called B-spline curves, work as u=u _iThe time sampled point.

The interpolation B-spline curves:

As shown in Figure 3, four 3 clamped B-spline curves overlap two control points of its head and the tail, are combined into a hollow.

3 clamped B-spline curves shapes using in the present invention by 4 control point controls, are out of shape arbitrarily so 4 B-spline curves of square shape can be controlled hollow fully.

Hollow four limits ought to generate intermediate interpolated B line transect according to these four B-spline curves in the middle of the square shape so round 43 clamped B-spline curves, and the interpolation B-spline curves also are 3 clamped B-spline curves.Interpolation B-spline curves interpolation in theory are more many more accurate, but can influence calculated performance again too much.So in embodiments of the present invention, the interpolation number is a variable N, and concrete quantity is set by actual conditions, and in the program code of embodiment, the interpolation number also is a variable, and the program adaptability of doing like this is stronger.

The crucial thinking that the interpolation B-spline curves generate is to obtain four control points of interpolation B-spline curves, as long as we obtain four control points of interpolation B-spline curves, just can determine the shape of these interpolation B-spline curves fully.The control point P at interpolation B-spline curves two ends ₀And P ₃Certainly to drop on respectively on the B-spline curves of hollow the right and left.

Introduce the simplest situation, interpolation B-spline curves quantity N=1, i.e. B-spline curves of an interpolation below.

The control point P0 of interpolation B-spline curves is sure on this curve, but should be just suitable on which location point of curve.Be in the middle of curve, still on the upper side or on the lower side, have what according to?

For the position of obtaining this control point P0 on earth on that position of curve, will obtain the sampled point of B-spline curves earlier.

In the method, under the situation of B-spline curves of an interpolation, u gets middle point value u=0.5, and namely sampled point is C (0.5).P is got at the control point of interpolation B-spline curves ₀=C (0.5).C (0.5) is a concrete point data, is a point value that has formula to calculate.Concrete computing formula is the formula of 3 Clamped B-spline curves (3) just, and substitution u=0.5 can obtain.

In like manner, when interpolation is counted N=2, namely insert 2 interpolation B-spline curves.Make u between 0 to 1, evenly get 2 values, and obtain corresponding sampling points.

For the 1st interpolation B-spline curves, get u=1/3, i.e. control point P ₀=C(1/3).

For the 2nd interpolation B-spline curves, get u=2/3, i.e. control point P ₀=C(2/3).

In like manner, when interpolation is counted N=3, namely insert 3 interpolation B-spline curves.Make u between 0 to 1, evenly get 3 values, and obtain corresponding sampling points.

For the 1st interpolation B-spline curves, get u=1/4, i.e. control point P ₀=C(1/4).

For the 2nd interpolation B-spline curves, get u=2/4, i.e. control point P ₀=C(2/4).

For the 3rd interpolation B-spline curves, get u=3/4, i.e. control point P ₀=C(3/4).

So when the interpolation number is N, namely insert N bar interpolation B-spline curves.Make u between 0 to 1, evenly get N value, and obtain corresponding sampling points.

For the 1st interpolation B-spline curves, get u=1/ (N+1), i.e. control point P ₀=C(1/ (N+1)).

For the 2nd interpolation B-spline curves, get u=2/ (N+1), i.e. control point P ₀=C(2/ (N+1)).

For the 3rd interpolation B-spline curves, get u=3/ (N+1), i.e. control point P ₀=C(3/ (N+1)).

..........

For N bar interpolation B-spline curves, get u=N/ (N+1), i.e. control point P ₀=C(N/ (N+1)).

I bar interpolation B-spline curves control point P ₀Formula be:

p ₀(i) the control point P of expression i bar interpolation B-spline curves ₀

The sampled point of expression hollow left side B-spline curves

Control point P for the interpolation B-spline curves ₃Ask method, the B-spline curves calculating sampling point on available hollow the right, method principle and P ₀The same.

I bar interpolation B-spline curves control point P ₃Formula be:

p ₃(i) the control point P of expression i bar interpolation B-spline curves ₃

The sampled point of expression hollow the right B-spline curves.

Introduce below and ask for interpolation B-spline curves control point P ₁Thinking and method, with top method, can obtain the control point P of whole interpolation B-spline curves ₀And P ₃Ask for interpolation B-spline curves control point P ₁Key idea be wish the hollow top B-spline curves through the B-spline curves of middle interpolation B-spline curves even variation to hollow bottom.The B-spline curves of hollow top variation just little by little generates article one interpolation B-spline curves, change again and little by little generate second interpolation B-spline curves, the each variation little by little all generates interpolation B-spline curves, thereby generation article one, second, ... N bar interpolation B-spline curves, and this variation is even variation.Because 3 times the clamped B-spline curves are determined by four control points are intact entirely, so can make control point P ₁And P ₂Even variation, thus make the curve even variation.

For convenience of explanation, adopt following mark:

Control point vector P ₀P ₁Be designated as:

Control point vector P ₃P ₂Be designated as:

At first introduce the simplest situation, interpolation is counted N=1, namely only inserts 1 interpolation B-spline curves.As shown in figure 10.

In Figure 10, solid line is the control point vector P of hollow top B-spline curves ₀P ₁, chain-dotted line is the control point vector P of the following B-spline curves of hollow ₀P ₁, dashed middle line is the control point vector P of interpolation B-spline curves ₀P ₁

Article 1, interpolation B-spline curves control point P ₁Formula is:

P ₁(1) the 1st interpolation B-spline curves control point P of expression ₁

P ₀(1) the 1st interpolation B-spline curves control point P of expression ₀

The following B-spline curves of expression hollow control point vector P ₀P ₁

Expression B-spline curves control point, hollow top vector P ₀P ₁

When as shown in figure 11, interpolation is counted N=2.

Article 1, interpolation B-spline curves control point P ₁Formula is:

Article 2, interpolation B-spline curves control point P ₁Formula is:

P ₁(1) the 1st interpolation B-spline curves control point P of expression ₁

P ₁(2) the 2nd interpolation B-spline curves control point P of expression ₁

P ₀(1) the 1st interpolation B-spline curves control point P of expression ₀

The following B-spline curves of expression hollow control point vector P ₀P ₁

Expression B-spline curves control point, hollow top vector P ₀P ₁

As shown in figure 12, when the interpolation number is N, N bar interpolation B-spline curves are arranged namely.

I bar interpolation B-spline curves control point P ₁Formula is:

P ₁(i) expression i bar interpolation B-spline curves control point P ₁, i=1,2,3.......N.

P ₀(1) the 1st interpolation B-spline curves control point P of expression ₀

The following B-spline curves of expression hollow control point vector P ₀P ₁

Expression B-spline curves control point, hollow top vector P ₀P ₁

For asking interpolation B-spline curves control point P ₂Method, utilize B-spline curves control point, hollow top vector P ₃P ₂, and the following B-spline curves of hollow control point vector P ₃P ₂, the method principle with ask P ₁Identical, as shown in figure 13.

I bar interpolation B-spline curves control point P ₂Formula is:

Interpolation B batten as shown in Figure 4.

Be illustrated in figure 6 as the video distortion schematic diagram, each Direct3D vertex vertex data comprise the summit space coordinates (x, y, z) and texture coordinate (tu, tv).Wherein no longer change after the texture coordinate initialization, (x, y z), play up output through Direct 3D, just can reach the effect of video distortion by changing the summit space coordinates.

It is 1 that Direct3D world matrix is set, i.e. no change.It is that eyes are seen to the Z positive direction at initial point that Direct 3D viewpoint matrix is set.Direct 3D perspective matrix is set for as shown in Figure 7.

In this example, get Zp=10.0.

Article 12, B-spline curves control point initialization value as shown in Figure 8.

Introduce below Direct3D vertex corner space coordinates (x, y, computational methods z) and principle:

After the B-spline curves interpolation through the front.The horizontal B-spline curves of a lot of bars have just been arranged in the hollow.The hollow top, B-spline curves and the interpolation B-spline curves of following script are referred to as whole B-spline curves.

(z value z) is changeless to Direct3D vertex corner space coordinates for x, y, and value is z=10;

(x y) is point coordinates, and (x, y) value equals the sampling point value of B-spline curves.

Whole B-spline curves are carried out the calculating sampling point value, and (z always equals 10 for x, value y) as Direct3D vertex corner space coordinates Vertex will to calculate the gained sampling point value.General thought that Here it is.

In theory, every horizontal B-spline curves are sampled, sampling number is more many more accurate, but can influence calculated performance again too much, is M so establish every horizontal B-spline curves sampling number, and concrete data are determined by actual conditions.

For these whole B-spline curves, these all are horizontal.From top to bottom, be called the 1st, the 2nd .... the M bar.

For the horizontal B-spline curves of article one, i.e. the B-spline curves C(u of hollow top), u is evenly got between 0 to 1.

U=0/ (M-1), 1/ (M-1), 2/ (M-1) ... (M-1)/(M-1), be total to M sampled point.Calculate sampling point value

C(0/(M-1)),C(1/(M-1)),C(2/(M-1)),…….C((M-1)/(M-1))。Formulate:

Vertex(x _i,y _i)=C((i-1)/(M-1))，i=1,2……M。

Vertex (x _i, y _i) expression i Direct3D vertex corner space coordinates (x, value y).

C ((i-1)/(M-1)) represents i sampling point value.

For the horizontal B-spline curves of second, i.e. article one interpolation B-spline curves.These B-spline curves are advanced sampled point calculate, in like manner also calculate Direct3D vertex corner space coordinates (x, value y).In like manner, can calculate Direct3D vertex corner space coordinates Vertex (x, the value of calculating all y) to whole B-spline curves.

So for whole B-spline curves, formula is as follows:

Vertex _j{x _i,y _i}＝C _j((i-1)/(M-1)) (11)

J=1,2,3 ... .N+2, horizontal B-spline curves of N+2 bar altogether, comprise 2 hollows up and down the B-spline curves on limit add N bar interpolation B-spline curves.

I=1,2,3 ... M, M sampled point altogether.

Vertex _j{ x _i, y _iI Direct3D vertex corner space coordinates x of expression j bar horizontal B-spline curves, the value of y.

C _jI sampling point value of the horizontal B-spline curves of ((i-1)/(M-1)) expression j bar.

For texture coordinate Vertex (tu, tv), principle as shown in figure 14, matrix pattern upper left corner texture coordinate is (0,0), the lower right corner is (1,1).The texture coordinate of whole Direct3D vertex corners is evenly distributed on the whole matrix pattern.

The vertex texture coordinate formula:

Upper left hollow:

${\mathrm{Vertex}}_j\{{\mathrm{tu}}_i,{\mathrm{tv}}_i\}=\{\frac{0.5*(i-1)}{(M-1)},\frac{0.5*(j-1)}{N+1}\}---\left(12\right)$

J=1,2,3 ... .N+2, horizontal B-spline curves of N+2 bar altogether, comprise 2 hollows up and down the B-spline curves on limit add N bar interpolation B-spline curves.

I=1,2,3 ... M, M sampled point altogether

Vertex _j{ tu _i, tv _iI Direct3D vertex corner texture coordinate tu of expression j bar horizontal B-spline curves, the value of tv.

In like manner, lower-left hollow:

${\mathrm{Vertex}}_j\{{\mathrm{tu}}_i,{\mathrm{tv}}_i\}=\{\frac{0.5*(i-1)}{(M-1)},\frac{0.5*(j-1)}{N+1}+0.5\}---\left(13\right)$

In like manner, upper right corner hollow:

${\mathrm{Vertex}}_j\{{\mathrm{tu}}_i,{\mathrm{tv}}_i\}=\{\frac{0.5*(i-1)}{(M-1)}+0.5,\frac{0.5*(j-1)}{N+1}\}---\left(14\right)$

In like manner, lower right corner hollow:

${\mathrm{Vertex}}_j\{{\mathrm{tu}}_i,{\mathrm{tv}}_i\}=\{\frac{0.5*(i-1)}{(M-1)}+0.5,\frac{0.5*(j-1)}{N+1}+0.5\}---\left(15\right)$

As shown in figure 15, for the 3D three-dimensional film, because frame of video has comprised right and left eyes two width of cloth pictures, so, expand matrix pattern similarly and become two matrix patterns, respectively the right and left eyes picture is out of shape.

Above content be in conjunction with concrete preferred implementation to further describing that the present invention does, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.

Claims (10)

1. video distortion correction method, it is characterized in that: video pictures is divided the location by 12 B-spline curves, forms a sphere of movements for the elephants type; Every B-spline curves can carry out independent adjustment and movement, and many B-spline curves have public end points; Divide part equally according to the interpolation B-spline curves that 4 B-spline curves of its encirclement carry out interpolation generation segmentation, at last video pictures is played up output for four of the sphere of movements for the elephants type.

2. video distortion correction method according to claim 1 is characterized in that, comprises the steps:

A. 12 B-spline curves initialization of sphere of movements for the elephants type;

B. Direct3D Vertex summit initialization;

C. by adjusting the control point of B-spline curves, change the shape of B-spline curves;

D. according to the B-spline curves after adjusting, generate the interpolation B-spline curves;

E. according to the B-spline curves after adjusting, upgrade Direct3D Vertex summit space coordinates (x, y, z);

F. Direct3D plays up the output video picture.

3. video distortion correction method according to claim 2, it is characterized in that: four B-spline curves overlap from beginning to end, are combined into a hollow, and can make up expansion to hollow.

4. video distortion correction method according to claim 2 is characterized in that: B-spline curves adopt 3 clamped B-spline curves, knot vector U=0,0,0,0,1,1,1,1}, four control points P ₀, P ₁, P ₂, P ₃.

5. video distortion correction method according to claim 2 is characterized in that: form two video pictures by two projectors.

6. a video distortion is characterized in that than positive system: video pictures is divided the location by 12 B-spline curves, forms a sphere of movements for the elephants type; Every B-spline curves can carry out independent adjustment and movement, and many B-spline curves have public end points; Divide part equally according to the interpolation B-spline curves that 4 B-spline curves of its encirclement carry out interpolation generation segmentation, at last video pictures is played up output for four of the sphere of movements for the elephants type.

7. video distortion according to claim 6 is characterized in that than positive system, comprising:

The B-spline curves initialization module is used for 12 B-spline curves initialization of sphere of movements for the elephants type;

The summit initialization module is used for Direct3D Vertex summit initialization;

Adjusting module is used for changing the shape of B-spline curves by adjusting the control point of B-spline curves;

Generation module is used for generating the interpolation B-spline curves according to the B-spline curves after adjusting;

Update module is used for according to the B-spline curves after adjusting, and renewal Direct3D Vertex summit space coordinates (x, y, z);

Play up output module, be used for Direct3D and play up the output video picture.

8. video distortion according to claim 7 is characterized in that than positive system, and four B-spline curves overlap from beginning to end, is combined into a hollow, and can makes up expansion to hollow.

9. video distortion according to claim 8 is characterized in that than positive system, B-spline curves adopt 3 clamped B-spline curves, knot vector U=0,0,0,0,1,1,1,1}, four control points P ₀, P ₁, P ₂, P ₃.

10. video distortion according to claim 9 is characterized in that than positive system, forms two video pictures by two projectors.

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