CN108881887B - A kind of field information acquisition and processing method based on Unity3D - Google Patents
A kind of field information acquisition and processing method based on Unity3D Download PDFInfo
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Abstract
The invention discloses a kind of field information acquisition and processing method based on Unity3D, light field display information is obtained by Unity3D exploitation engine, is rendered, binary conversion treatment, recompiles the operations such as synthesis processing, transmission, the correct true Three-dimensional Display of realization light field display system hardware terminal.Field information based on Unity3D of the invention obtains and processing method, can be effectively solved at this stage entity video camera shooting acquisition modes in there are at high cost, it is complicated for operation, the problems such as difficult in maintenance, and it can greatly enrich light field and show content, extend the application field of light field display technology, the significant development for pushing light field display technology.
Description
Technical field
The present invention relates to light field field of display technology, in particular to a kind of field information based on Unity3D obtains and place
Reason method.
Background technique
In the passing over half a century dominated by Moore's Law, miniaturisation high-performance integrated circuit drives Light Electrical
The development of the every profession and trades such as calculation, display industry is under this overall background, and the display element having an epoch-marking significance emerges one after another, in two dimension
While the direction of display industry towards the high pixel of large scale constantly promotes, Three-dimensional Display industry also obtains unprecedented pass
Note.
Light field shows to be exactly most representative one in Three-dimensional Display.Light field Three-dimensional Display is by utilizing kinds of displays
Part and optical element generate high density directional rays, realize the recovery to body surface optical field distribution, and viewer is auxiliary without wearing
Equipment is helped to may be viewed by.As all kinds of spatial light modulators in recent years are quickly sent out towards the direction of high pixel density modulation rate
Exhibition, light field display technology all have been a great concern in scientific circles and industry.To obtain good light field display effect, light
Field display suffers from high requirement to the acquisition and processing of field information data, therefore how on the basis of current hardware system
Realize that better field information obtains and processing is the main direction of studying that light field is shown.
Currently, the major way that field information obtains is that the shooting of multiple entity video camera omnibearing stereo obtains.This mode is not
It is only at high cost, complicated for operation and difficult in maintenance, it shows that information is single, significantly limits the development of light field display technology.For
Solution problem above, it is eager to need a kind of easily convenient and fast field information acquisition modes.
Unity3D is a software for being specifically used to make scene of game, architectural design, animated show.Unity3D for
The model that the Art Design software development of mainstream comes out, such as 3ds Max, Maya, it is nearly all compatible, if it can be realized one
Field information of the kind based on Unity3D obtains and processing method, can not only enrich the content that light field is shown, while can be very big
Save the cost, more quickly and easily obtain show information.
Summary of the invention
The purpose of the present invention is technology based on the above background, a kind of field information based on Unity3D is provided and is obtained and place
Reason method can be effectively solved in the acquisition modes of entity video camera shooting at this stage there are at high cost, and complicated for operation, maintenance is tired
The problems such as difficult, and can greatly enrich light field and show content, the application field of light field display technology is extended, significantly promotion light
The development of field display technology.
In order to reach above-mentioned technical effect, the present invention takes following technical scheme:
A kind of field information acquisition and processing method based on Unity3D, comprising the following steps:
A. scene needed for creation light field is shown in Unity3D exploitation engine, and put at least 600 virtual cameras;
B. rendering textures RenderTexture is added in the target textures of every virtual camera, while rendering patch is set
The resolution ratio of figure is 1024 × 768;
C. binary conversion treatment is carried out to each rendering textures;
D. by treated, picture synthesizes 24 true color images that 1 width resolution ratio is 6144 × 3200;
E. the image of synthesis is output to the light field display module in light field display system and carries out the very three-dimensional of scene information
Display.
In the field information acquisition and processing method of the invention based on Unity3D, preferably set virtual in step A
The disposing way of camera is spherical convergence type disposing way, and directional diffuser screen rotates a circle updated figure in light field display system
As realizing 360 degree of horizontal reconstruction of optical wave field, if reconstruct static three-dimensional scene, next swing circle only need to update these figures again
As, directional diffuser screen the updated picture number that rotates a circle determines the angular resolution of reconstruction of optical wave field, the rotation speed of screen
Degree determines the refresh rate of scene, and in order to realize the continuous motion parallax of three-dimensional scenic, the angular resolution of scene cannot be too low, if with
0.6 degree of angular resolution is limited, i.e. one week picture number updated of screen rotation must not be less than 600 width, so of the invention
At least 600 virtual cameras are selected in method in Unity3D virtual reality engine to provide light field and show required at least 600 width
Picture is to guarantee continuity that light field is shown.
Further, binary conversion treatment is carried out to each rendering textures in the step C specifically: one pixel value of setting
Threshold value T1, after RGB color image gray processing, pixel value is less than threshold value T by each pixel value of scan image1Pixel value
It is set as 0, is rendered as black, i.e. R=G=B=0;Pixel value is greater than threshold value T1Pixel value be set as 255, be rendered as white
Color, i.e. R=G=B=255.
Further, the pixel value threshold value T1Setting method are as follows:
Step 1: one pixel value initial threshold value T of setting at random;
Step 2: each pixel data P (m, n) is divided by object pixel data G according to threshold figure1With background pixel data
G2, wherein m is row, and n is column;
Step 3: computing object pixel data G1Average value m1With background pixel data G2Average value m2;
Step 4: new pixel value threshold value T is calculatedn, Tn=(m1+m2)/2;
Step 5: with the pixel value threshold value T calculated in step 4nFor new initial threshold value return step two, with new
It is object pixel data and background pixel data that pixel value threshold value, which continues point pixel data,;
Step 6: step 2 is repeated to five, until the new pixel value threshold value T calculatednEqual to last threshold value meter
The new pixel value threshold value calculated, then pixel value threshold value TnAs pixel value threshold value T1。
Further, the specific implementation of the step D are as follows:
D1. the 1-bit image IMG1 that resolution ratio is 1024 × 768 8-bit that resolution ratio is 128 × 768 is converted into scheme
As IMG2;
D2., the 8-bit image IMG2 of resolution ratio 128 × 768 is converted into the 8-bit image of resolution ratio 3072 × 32
IMG3;
D3. the 8-bit image IMG3 of the corresponding 600 obtained width resolution ratio 3072 × 32 of at least 600 virtual cameras is turned
It is the 24 of 6144 × 3200 that 24-bit the image IMG4, image IMG4 for changing resolution ratio 6144 × 3200 into, which are the resolution ratio of demand,
Position true color image.
Further, the quantity of the virtual camera is 600.
Further, the 1-bit image IMG1 that resolution ratio is 1024 × 768 is converted into resolution ratio in the step D1 is
1 pixel in 128 × 768 8-bit image IMG2, i.e. IMG2 can indicate continuous 8 pixel black and white values in IMG1, tool
Body transformation rule are as follows:
Wherein P1(m, n) indicates the 1-bit black and white values of m row the n-th column pixel of image IMG1,
P2(m, n) indicates the 8-bit black and white values of m row the n-th column pixel of image IMG2;
The 8-bit image IMG2 of resolution ratio 128 × 768 is converted into the 8- of resolution ratio 3072 × 32 in the step D2
Bit image IMG3, specific transformation rule are as follows:
P3(m, n)=P2((m × 128+n)/3072, (m × 128+n) %3072), [0,32), n ∈ is [0,3072) by m ∈;
In the step D3 by the 8-bit image IMG3 of 600 width resolution ratio 3072 × 32 be converted into resolution ratio 6144 ×
3200 24-bit image IMG4, specific transformation rule are as follows:
P4(m, n, k)=P3(m,n)|t=P3(m,n)(n+3072)×300+k×100+m×32,m∈[0,3200),j∈[0,6144),
k∈{0,1,2};
Wherein P4The channel m row the n-th column pixel k of (m, n, k) expression IMG4 (k=0,1,2 respectively indicates R, G, channel B)
8-bit gray value, P3(m,n)|tIndicate the 8-bit gray value of m row the n-th column pixel of t width IMG3 image.
Further, composograph the light field display module in light field display system is output in the step E to carry out
When the true Three-dimensional Display of scene information, specific implementation are as follows: by two full HD dual link DVI cables by composograph
It is output in light field display system, the display module in the system carries out the true Three-dimensional Display of scene information.
Compared with prior art, the present invention have it is below the utility model has the advantages that
Field information based on Unity3D of the invention obtains and processing method, easily can easily realize field information
Obtain and processing, this method can not only in the effective solution acquisition modes of entity video camera shooting at this stage there are at high cost,
It is complicated for operation, it is difficult in maintenance the problems such as, and can greatly enrich light field show content, extend light field display technology application
Field, the significant development for pushing light field display technology.
Detailed description of the invention
Fig. 1 is that the field information based on Unity3D of one embodiment of the present of invention obtains and the process of processing method is shown
It is intended to.
Specific embodiment
Below with reference to the embodiment of the present invention, the invention will be further elaborated.
Embodiment:
As shown in Figure 1, a kind of field information in Unity3D obtains and processing method, it is main to be drawn by Unity3D exploitation
It holds up and light field display information is obtained, is rendered, binary conversion treatment, recompiles the operations such as synthesis processing, transmission, realize light field
The correct true Three-dimensional Display of display system hardware terminal.
Wherein, step 101 is that creation light field shows required scene in Unity3D exploitation engine, and puts 600 virtually
Camera.
Specifically the specific disposing way of virtual camera is spherical convergence type disposing way in the present embodiment, is shown in light field
Directional diffuser screen the updated image that rotates a circle realizes 360 degree of horizontal reconstruction of optical wave field in system, if reconstruct static three-dimensional field
Scape, next swing circle only need to update these images again.Directional diffuser screen the updated picture number that rotates a circle is determined
The angular resolution of reconstruction of optical wave field is determined, the rotation speed of screen determines the refresh rate of scene, in order to realize that three-dimensional scenic is continuous
The angular resolution of motion parallax, scene cannot be too low, if being limited with 0.6 degree of angular resolution, it means that screen rotation one week
Say that the picture number updated must not be less than 600 width, so selecting 600 virtual cameras in Unity3D virtual reality engine to mention
600 width pictures needed for showing for light field are to guarantee continuity that light field is shown.
In this example, Unity3D develops scene needed for the creation light field that engine can be simple and convenient is shown, with ground court
For scape model, it is only necessary to create Sphere model file under Hierarchy view, and earth textures are attached to the model
Material is upper.If complex scene, Unity3D develops the mould that the Art Design software development of the compatible mainstream of engine comes out
Type, such as 3ds Max, Maya, therefore carry out light field using Unity3D exploitation engine and show that the creation of scene greatly enriches
The content that light field is shown.
Step 102 is that rendering textures RenderTexture is added in the target textures of every virtual camera, is arranged simultaneously
The resolution ratio for rendering textures is 1024 × 768.
Rendering textures therein are a kind of special texture types, can generate and update at runtime.To use rendering
Textures first have to one new rendering texture of creation, and a specified video camera renders it, then can be as normal
The texture of rule is equally material addition rendering texture.Meanwhile the three-dimensional output image resolution that light field display system hardware is supported
Rate is 1024 × 768, and it is optimal in order to which light field shows to obtain that the resolution ratio for rendering textures is set equal resolution by the present invention
Display effect.
Step 103 is to carry out binary conversion treatment, concrete mode are as follows: to RGB color image gray processing to each rendering textures
After, each pixel value of scan image is less than threshold value T to value1Pixel value be set as 0, be rendered as black, i.e. R=G=B
=0;Threshold value T is greater than to value1Pixel value be set as 255, be rendered as white, i.e. R=G=B=255.It is by above step
Achievable binary conversion treatment.
It in this example, first should threshold value T1Size, method particularly includes:
1) an initial threshold value T is set, oneself can be arranged or be generated according to random device;
2) object pixel data G is divided into according to each pixel data P (m, n) of threshold figure1With background pixel data G2.(n is
Row, m are column);
3)G1Average value be m1,G2Average value be m2;
4) a new threshold value T is calculatedn=(m1+m2)/2;
5) step 2 is returned to, continuing a point pixel data with new threshold value is object and background pixel data, and repeats the 2nd~4
Step, until the new threshold value calculated is equal to last threshold value, the new threshold value calculated here come out is T1。
Step 104 is that picture synthesizes 24 true color images that 1 width resolution ratio is 6144 × 3200 by treated.Tool
Body implementation are as follows:
1) the 8-bit image for being 128 × 768 by the 1-bit image IMG1 compression component resolution that resolution ratio is 1024 × 768
IMG2;
2) the 8-bit image IMG2 of resolution ratio 128 × 768 is converted into the 8-bit image IMG3 of resolution ratio 3072 × 32;
3) the 8-bit image IMG3 of 600 width resolution ratio 3072 × 32 is converted into the 24-bit of resolution ratio 6144 × 3200
Image IMG4.Wherein, IMG4 is 24 true color images of demand resolution ratio 6144 × 3200.
It in this example, is 128 × 768 by the 1-bit image IMG1 compression component resolution that resolution ratio is 1024 × 768
1 pixel in 8-bit image IMG2, i.e. IMG2 can indicate continuous 8 pixel black and white values in IMG1, transformation rule are as follows:
Wherein P1(m, n) indicates the 1-bit black and white values of m row the n-th column pixel of image IMG1, P2(m, n) indicates image
The 8-bit black and white values of m row the n-th column pixel of IMG2.
The 8-bit image IMG2 of resolution ratio 128 × 768 is converted into the 8-bit image IMG3 of resolution ratio 3072 × 32, is turned
Change rule are as follows:
P3(m, n)=P2((m × 128+n)/3072, (m × 128+n) %3072), [0,32), n ∈ is [0,3072) by m ∈
The 8-bit image IMG3 of 600 width resolution ratio 3072 × 32 is converted into the 24-bit figure of resolution ratio 6144 × 3200
As IMG4, transformation rule are as follows:
P4(m, n, k)=P3(m,n)|t=P3(m,n)(n+3072)×300+k×100+m×32,m∈[0,3200),j∈[0,6144),
k∈{0,1,2}
Wherein P4The channel m row the n-th column pixel k of (m, n, k) expression IMG4 (k=0,1,2 respectively indicates R, G, channel B)
8-bit gray value, P3(m,n)|tIndicate the 8-bit gray value of m row the n-th column pixel of t width IMG3 image.
Step 105 is that the light field display module being output to composograph in light field display system carries out the true of scene information
Three-dimensional Display.Specific implementation are as follows: composograph is output to light field display system by two full HD dual link DVI cables
In system, the display module in the system carries out the true Three-dimensional Display of scene information.
In this example, light field show in need the transmission of mass data, if the data bandwidth that setting whole system is transmitted
For BWall, then BWallExpression are as follows:
BWall=w × h × d × f
Wherein w indicates that the width of image, h indicate the height of image, and d indicates the locating depth of image, and f indicates the refresh frame of image
Rate.
If 24 true color images according to 6144 × 3200@30hz transmit, the transmission data bandwidth of system are as follows:
BWall=6144 × 3200 × 24 × 30=13.2Gbit/s
The full HD dual link DVI cable of common support can be 1920 × 1080 with the frame frequency display resolution of 60hz
True color image, it is contemplated that relevant industries are related to standard requirements and its peak transfer rate because 1.3 times of nominal rated speed, then its
Transmission bandwidth BW1dviIt may be expressed as:
BW1dvi=1920 × 1080 × 24 × 60 × 2 × 1.3=7.2Gbit/s
And the main broadband of system transmission are as follows:
BWall=13.2Gbit/s≤BW1dvi× 2=14.4Gbit/s
It can be seen that the transmission of synthesis picture is carried out in the present embodiment using two full HD dual link DVI cables
The transmission requirement for fully meeting overall data bandwidth guarantees the real-time and accuracy of transmission.
From the foregoing, it will be observed that this method is not only the present invention provides a kind of easily convenient and fast field information acquisition and processing method
It can be effectively solved in the acquisition modes of entity video camera shooting at this stage there are at high cost, it is complicated for operation, it is difficult in maintenance etc. to ask
Topic, and can greatly enrich light field and show content, the application field of light field display technology is extended, it is significant that light field is pushed to show
The development of technology.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (6)
1. a kind of field information based on Unity3D obtains and processing method, which is characterized in that comprising the following steps:
A. scene needed for creation light field is shown in Unity3D exploitation engine, and put at least 600 virtual cameras;
B. rendering textures RenderTexture is added in the target textures of every virtual camera, while rendering textures are set
Resolution ratio is 1024 × 768;
C. binary conversion treatment is carried out to each rendering textures;
D. by treated, picture synthesizes 24 true color images that 1 width resolution ratio is 6144 × 3200;
The specific implementation of the step D are as follows:
D1. the 1-bit image IMG1 that resolution ratio is 1024 × 768 is converted into the 8-bit image that resolution ratio is 128 × 768
IMG2;
D2., the 8-bit image IMG2 of resolution ratio 128 × 768 is converted into the 8-bit image IMG3 of resolution ratio 3072 × 32;
D3. the 8-bit image IMG3 of the corresponding 600 obtained width resolution ratio 3072 × 32 of at least 600 virtual cameras is converted into
24-bit the image IMG4, image IMG4 of resolution ratio 6144 × 3200 are 24 that the resolution ratio of demand is 6144 × 3200 true
Color image;
E. the image of synthesis is output to the true Three-dimensional Display that the light field display module in light field display system carries out scene information.
2. a kind of field information based on Unity3D according to claim 1 obtains and processing method, which is characterized in that
Binary conversion treatment is carried out to each rendering textures in the step C specifically: one pixel value threshold value T of setting1, to RGB color
After image gray processing, pixel value is less than threshold value T by each pixel value of scan image1Pixel value be set as 0, be rendered as
Black, i.e. R=G=B=0;Pixel value is greater than threshold value T1Pixel value be set as 255, be rendered as white, i.e. R=G=B=
255。
3. a kind of field information based on Unity3D according to claim 2 obtains and processing method, which is characterized in that
The pixel value threshold value T1Setting method are as follows:
Step 1: one pixel value initial threshold value T of setting at random;
Step 2: each pixel data P (m, n) is divided by object pixel data G according to threshold figure1With background pixel data G2,
In, m is row, and n is column;
Step 3: computing object pixel data G1Average value m1With background pixel data G2Average value m2;
Step 4: new pixel value threshold value T is calculatedn, Tn=(m1+m2)/2;
Step 5: with the pixel value threshold value T calculated in step 4nFor new initial threshold value return step two, with new pixel value
It is object pixel data and background pixel data that threshold value, which continues point pixel data,;
Step 6: step 2 is repeated to five, until the new pixel value threshold value T calculatednIt is come out equal to last threshold calculations
New pixel value threshold value, then pixel value threshold value TnAs pixel value threshold value T1。
4. a kind of field information based on Unity3D according to claim 1 obtains and processing method, which is characterized in that
The quantity of the virtual camera is 600.
5. a kind of field information based on Unity3D according to claim 4 obtains and processing method, which is characterized in that
The 1-bit image IMG1 that resolution ratio is 1024 × 768 8-bit that resolution ratio is 128 × 768 is converted into the step D1 to scheme
As IMG2, i.e. 1 pixel in IMG2 can indicate continuous 8 pixel black and white values in IMG1, specific transformation rule are as follows:
Wherein P1(m, n) indicates the 1-bit black and white values of m row the n-th column pixel of image IMG1,
P2(m, n) indicates the 8-bit black and white values of m row the n-th column pixel of image IMG2;
The 8-bit image IMG2 of resolution ratio 128 × 768 8-bit for being converted into resolution ratio 3072 × 32 is schemed in the step D2
As IMG3, specific transformation rule are as follows:
P3(m, n)=P2((m × 128+n)/3072, (m × 128+n) %3072), [0,32), n ∈ is [0,3072) by m ∈;
The 8-bit image IMG3 of 600 width resolution ratio 3072 × 32 is converted into resolution ratio 6144 × 3200 in the step D3
24-bit image IMG4, specific transformation rule are as follows:
P4(m, n, k)=P3(m,n)|t=P3(m,n)|(n+3072)×300+k×100+m×32,m∈[0,3200),j∈[0,6144),k∈
{0,1,2};
Wherein P4(m, n, k) indicates the 8- in the channel m row the n-th column pixel k (k=0,1,2 respectively indicates R, G, channel B) of IMG4
Bit gray value, P3(m,n)|tIndicate the 8-bit gray value of m row the n-th column pixel of t width IMG3 image.
6. a kind of field information based on Unity3D according to claim 1 obtains and processing method, which is characterized in that
Composograph is output to the light field display module in light field display system in the step E and carries out the very three-dimensional aobvious of scene information
When showing, specific implementation are as follows: composograph is output to light field display system by two full HD dual link DVI cables
In, the display module in the system carries out the true Three-dimensional Display of scene information.
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CN103745448A (en) * | 2013-12-24 | 2014-04-23 | 四川大学 | Rapid generating method for ultrahigh-resolution composite image in raster 3D displaying |
CN103957400A (en) * | 2014-05-09 | 2014-07-30 | 北京乐成光视科技发展有限公司 | Naked eye 3D display system based on Unity3D game engine |
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CN103745448A (en) * | 2013-12-24 | 2014-04-23 | 四川大学 | Rapid generating method for ultrahigh-resolution composite image in raster 3D displaying |
CN103957400A (en) * | 2014-05-09 | 2014-07-30 | 北京乐成光视科技发展有限公司 | Naked eye 3D display system based on Unity3D game engine |
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