CN108989775A - A kind of projection screen seamless joint method and device - Google Patents
A kind of projection screen seamless joint method and device Download PDFInfo
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- CN108989775A CN108989775A CN201710413349.1A CN201710413349A CN108989775A CN 108989775 A CN108989775 A CN 108989775A CN 201710413349 A CN201710413349 A CN 201710413349A CN 108989775 A CN108989775 A CN 108989775A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3147—Multi-projection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
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Abstract
The application provides a kind of projection screen seamless joint method and device, this method is used to carry out anastomosing and splicing to two or more projected images of projection on the projection screen, two perspective planes on the projection screen are incident upon by two projection devices the described method includes: obtaining, described two perspective planes are the first perspective plane and the second perspective plane；Brightness decay adjusting is carried out to the overlapping region on first perspective plane and the second perspective plane, and the brightness syncretizing effect figure after being adjusted；Syncretizing effect figure described in every frame image call to first perspective plane and second perspective plane；It is adjusted using pixel of the mapping technology to the overlapping region, so that the image of the overlapping region is blended with the image on the projection screen in addition to the overlapping region, and then gap and the ghost image of overlapping region joining place are eliminated, so that the screen-picture after adjusting is completely clear.
Description
Technical field
The present invention relates to multimedia overhead projector technical field, in particular to a kind of projection screen seamless joint method and device.
Background technique
With the fast development of science and technology, high resolution large screen display system is in each necks such as science and technology, culture, education
Play a part of becoming more and more important in domain.In order to reach better visual immersion, display screen not only becomes to get on area
Come bigger.
But existing multisource projection splicing means, due to different by two beam sources in large screen integration region image
The beam combination of projector is influenced by many factors such as incident angle, reflection coal quality, brightness, can be made on large screen
The image of synthesis overlaps, or has the gap when splicing in two perspective planes junction, influences visual experience.
Summary of the invention
A kind of projection screen seamless joint method and device are provided in the embodiment of the present invention, solve existing two projectors
The image of projection ghost image for generating and the problem of gap when being shown on a large screen.
In a first aspect, the embodiment of the present application provides a kind of projection screen seamless joint method, this method is used for being shown in
Two or more projected images on projection screen carry out anastomosing and splicing, which comprises
It obtains and is incident upon two perspective planes on the projection screen by two projection devices, described two perspective planes are the
The overlapping region on one perspective plane and the second perspective plane and first perspective plane and the second perspective plane, to the overlapping region
Brightness decay adjusting is carried out, and generates the brightness syncretizing effect figure after adjusting；To first perspective plane and second projection
Brightness syncretizing effect figure described in every frame image call in face；It is adjusted using pixel of the mapping technology to the overlapping region
Section, so that the image of the overlapping region after adjusting mutually melts with the image on the projection screen in addition to the overlapping region
It closes.
The method that present aspect provides first carries out Attenuation adjustable to the brightness of the overlapping region of projection screen, makes overlapping region
Brightness is identical as the brightness in regions other on projection screen, and mapping technology is recycled to adjust the pixel of overlapping region
Section carries out local modulation to some pixel on overlapping region, and then eliminates gap and the ghost image of overlapping region joining place, so that
Screen-picture after adjusting is completely clear.
In addition, this method can reach the seamless spliced of single pixel grade, Single cell fusion effect picture is only called, is avoided using repeatedly
For operation, splicing speed is improved.
With reference to first aspect, in a kind of possible realization, to the every of first perspective plane and second perspective plane
Syncretizing effect figure described in frame image call include: the brightness syncretizing effect figure is stored in respectively with bitmap file format it is described
In two projection devices；The brightness syncretizing effect figure of the bitmap file format is called on each projection device respectively,
To facilitate extraction and call the syncretizing effect figure.
With reference to first aspect, described to utilize mapping technology to the overlapping region in alternatively possible realization
Pixel to be adjusted include: to scan each pixel of the overlapping region, and obtain the rgb value of each pixel；
Whether within a preset range to judge the rgb value of each pixel；If not, to the picture being located at except the preset range
The rgb value of vegetarian refreshments is adjusted, and makes the rgb value of each pixel after adjusting within the preset range.By to each picture
The rgb value of vegetarian refreshments is adjusted, and making to be incident upon the picture of projection screen, tone is unified on the whole, brightness uniformity, avoid due to
The whole visual effect of the excessive lightness or darkness image frame of local color.
With reference to first aspect, in alternatively possible realization, to the weight on first perspective plane and the second perspective plane
Folded region carries out brightness decay adjusting and specifically includes: the lumen on the overlapping region is obtained, to the stream on the overlapping region
It is bright to be adjusted, keep the lumen after adjusting identical as the lumen on first perspective plane or second perspective plane.
With reference to first aspect, in alternatively possible realization, the method also includes: to first perspective plane and institute
The image for stating the projection of the second perspective plane carries out alignment correction, specifically: respectively on first perspective plane and second projection
On face project by groups of samples at regular grid pattern；Utilize grid chart on the grid adjustment each perspective plane of rule adjustment
The location and shape of case are aligned the lattice on first perspective plane and second perspective plane；Utilize Triangulation Algorithm
The lattice adjusted is handled, the geometry vertex as texture mapping is obtained；Each throwing is obtained respectively
The frame buffer image of shadow equipment, and using each frame buffer image as textured pattern；It will be described using mapping technology
Textured pattern is mapped on the geometry vertex, and draws to the pattern after the mapping, obtains first perspective plane
With the projected image of second perspective plane alignment.
Alignment correction is carried out by the image to the first perspective plane and the second perspective plane, makes to project two throwings on the screen
The image in shadow face is completely coincident in overlapping region, avoids image when projection that ghost image occurs.
Second aspect, the embodiment of the present application also provides a kind of seamless spliced device of projection screen, which is applied to upper
Method described in first aspect is stated, specifically, described device includes: acquiring unit, is projected for obtaining by two projection devices
The overlapping region on two perspective planes and first perspective plane and the second perspective plane on the projection screen, wherein institute
Stating two perspective planes is the first perspective plane and the second perspective plane；Brightness adjusting unit, for first perspective plane and second
Overlapping region on perspective plane carries out brightness decay adjusting, and generates the brightness syncretizing effect figure after adjusting；Call unit is used for
Brightness syncretizing effect figure described in every frame image call to first perspective plane and second perspective plane；Pixel adjustment list
Member, for being adjusted using pixel of the mapping technology to the overlapping region, so that the overlapping region after adjusting
Image blended with the image on the projection screen in addition to the overlapping region.
In conjunction with second aspect, in a kind of possible realization, the call unit, which is specifically used for merging the brightness, is imitated
Fruit figure is stored in described two projection devices with bitmap file format respectively, calls institute on each projection device respectively
The brightness syncretizing effect figure of bitmap file format.
In conjunction with second aspect, in alternatively possible realization, the pixel adjustment unit includes: scanning element, is used for
Each pixel of the overlapping region is scanned, and obtains the rgb value of each pixel；Judging unit, it is every for judging
All within a preset range whether the rgb value of a pixel；The pixel adjustment unit is used for if not, described to being located at
The rgb value of pixel except preset range is adjusted, make adjust after each pixel rgb value the preset range it
It is interior.
In conjunction with second aspect, in alternatively possible realization, the acquiring unit is also used to obtain the overlapping region
On lumen, the brightness adjusting unit makes the stream after adjusting specifically for the lumen on the overlapping region is adjusted
It is bright identical as the lumen on first perspective plane or second perspective plane.
In conjunction with second aspect, in alternatively possible realization, device further include: alignment unit, wherein the alignment is single
Member includes: grid projecting unit, for projecting on first perspective plane and second perspective plane by groups of samples respectively
At regular grid pattern；Grid adjustment unit, for utilizing grid chart on the grid adjustment each perspective plane of rule adjustment
The location and shape of case are aligned the lattice on first perspective plane and second perspective plane；Trigonometric ratio processing unit,
For being handled using Triangulation Algorithm by the lattice trigonometric ratio adjusted, obtain several as texture mapping
What vertex；Frame buffer image acquisition unit, for obtaining the frame buffer image of each projection device respectively, and by each institute
Frame buffer image is stated as textured pattern；Textured pattern map unit, for utilizing mapping technology by the textured pattern
It is mapped on the geometry vertex, and the pattern after the mapping is drawn, obtains first perspective plane and described
The projected image of two perspective planes alignment.
The device that present aspect provides makes the grid on the first perspective plane and the second perspective plane by sampled point and trigonometric ratio processing
Pattern registration, and then the correction of the alignment to two perspective planes is realized, avoid image when seamless spliced from causing due to being misaligned
Ghost phenomena.
The third aspect, the embodiment of the present application also provide a kind of computer storage medium, wherein the computer storage medium can
It is stored with program, which may include a kind of each implementation of projection screen seamless joint method provided by the present application when executing
In some or all of step.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of projection screen seamless joint method flow diagram provided by the embodiments of the present application；
Fig. 2 is another projection screen seamless joint method flow diagram provided by the embodiments of the present application；
Fig. 3 is another projection screen seamless joint method flow diagram provided by the embodiments of the present application；
Fig. 4 is a kind of seamless spliced apparatus structure block diagram of projection screen provided by the embodiments of the present application；
Fig. 5 is the seamless spliced apparatus structure block diagram of another projection screen provided by the embodiments of the present application；
Fig. 6 is a kind of structural schematic diagram of the seamless spliced system of projection screen provided by the embodiments of the present application；
Fig. 7 is the effect picture of display on the projection screen before one kind provided by the embodiments of the present application is seamless spliced；
The effect picture of display on the projection screen when Fig. 8 is provided by the embodiments of the present application a kind of seamless spliced；
Fig. 9 is the effect picture of display on the projection screen after one kind provided by the embodiments of the present application is seamless spliced.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
The seamless spliced method and apparatus of a kind of projection screen provided by the embodiments of the present application, based on the more of PC machine group's framework
Channel virtual reality optical projection system, for being merged to the seam projected on large screen, prevent the overlapping region of projection with
The inconsistent problem of picture entirety visual effect.
As shown in fig. 6, the seamless spliced system of projection screen includes: multiplex projection machine 10, video server 20, widescreen
Projection screen 30, multichannel distributor 40, professional amplifirer 50 and multimedia loudspeaker box 60 further include for connecting the logical of each equipment
Believe interface and connection line etc..The multiplex projection machine includes at least 2 projectors, for projecting image to widescreen projection curtain,
And the image of projection is sent to by video server 20 by multichannel distributor 40, optionally, the projector 10 can be
Engineering projector.The video server 20 includes processor, transceiver and display, and the video server 20 is for receiving
Image and information from projector, and splicing is carried out to image, to eliminate ghost image and the gap of the widescreen projection curtain.
The profession amplifirer 50 makes the system be connected with other multimedia equipments, for example, with multimedia sound for exporting connection
Case 60 is connected.
In addition, also preserving the execution software of processing image in the video processor 20, such as texture processing program is soft
Part etc. carries out fusion and splicing to the image on projection screen.
In the present embodiment, seamless spliced processing, described two projections are carried out to the image by two projection device projections
Equipment transmits identical image from two different angles to large screen respectively, and the image of two transmissions has on the projection screen
Partly overlap region and seam crossing, since the brightness of the overlapping region and seam crossing is higher than the brightness of underlapped projected image,
So the image color difference on entire projection screen is larger, image is integrally inconsistent, to eliminate the image synthesized on large screen
Overlapping region, or had the gap when splicing in two perspective planes junction, the application uses following methods:
A kind of projection screen seamless joint method, this method be used for projection on the projection screen two or two with
Upper projected image carries out anastomosing and splicing, and the present embodiment is by taking two projected images as an example, as shown in Figure 1, which comprises
Step S101: obtaining and be incident upon two perspective planes on the projection screen by two projection devices, described two
Perspective plane is the first perspective plane and the second perspective plane, and obtains the overlapping region on first perspective plane and the second perspective plane.
Specifically, two perspective planes on projection screen can be obtained by camera；And the figure for the projection screen that will acquire
As being shown on the display of PC.
Step S102: carrying out brightness decay adjusting to the overlapping region on first perspective plane and the second perspective plane, and
Generate the brightness syncretizing effect figure after adjusting.
Since the brightness of overlapping region is two times of underlapped regional luminance, so, first reduce the bright of the overlapping region
Degree, make its with for the brightness of overlapping region it is identical, it is and described as shown in fig. 7, intermediate region brighter areas is the overlapping region
Two bright lines, the i.e. suture of two perspective planes handover are shown on projection screen.In a possible embodiment, by overlapping region
Brightness indicate that computer obtains the lumen value of two projection devices respectively with lumen, wherein each lumen value passes through every
The gain of parameter of a projection device.Two identical projection devices are typically chosen, so that the basic phase of the brightness of each projection device
Together, computer regulated reduces the lumen of overlapping region, makes the lumen after adjusting and first perspective plane or second projection
The lumen in face is identical, and to reduce the brightness of overlapping region, it is identical as the brightness in underlapped region to be adjusted to the brightness, after adjusting
Luminance picture as the brightness syncretizing effect figure.
As shown in Figure 1, the method also includes: step S103, to first perspective plane and second perspective plane
Brightness syncretizing effect figure described in every frame image call.
Specifically, step S103 include: the brightness syncretizing effect figure is stored in respectively with bitmap file format it is described
In two projection devices.
Institute's bitmap file is the image indicated by pixel array, the color information of each pixel by RGB combination or
Person's gray value indicates, since bitmap is the pattern formed with countless color points, it is possible to by by brightness syncretizing effect figure
It is indicated and then be can be realized in the form of bitmap file, the rgb value or gray value of each pixel is adjusted, and then to change office
The color of portion's pixel.
The brightness syncretizing effect figure of the bitmap file format is called on each projection device respectively.
Step S104: being adjusted using pixel of the mapping technology to the overlapping region, so that the overlay region
The image in domain is blended with the image on the projection screen in addition to the overlapping region.
Texture mapping (English: the Texture Mapping) technology refers to the texture pixel mapping in texture space
The process of pixel into screen space.
In system drawing process, the brightness syncretizing effect bitmap described in each frame image call on each perspective plane, then
Brightness fusion treatment is carried out using multipass mapping technology, to eliminate the gap when splicing of perspective plane, as shown in figure 8, for warp
Cross it is seamless spliced after effect picture.
Method provided in this embodiment first carries out Attenuation adjustable to the brightness of the overlapping region of projection screen, makes overlay region
The brightness in domain is identical as the brightness in regions other on projection screen, and mapping technology is recycled to carry out the pixel of overlapping region
It adjusts, local modulation is carried out to some pixel on overlapping region, and then eliminate gap and the ghost image of overlapping region joining place, made
Screen-picture after must adjusting is completely clear.
Further, as shown in Fig. 2, using mapping technology to the picture of the overlapping region described in step S104
Element, which is adjusted, includes:
Step S201: scanning each pixel of the overlapping region, and obtains the rgb value of each pixel；
Step S202: whether within a preset range to judge the rgb value of each pixel；The preset range is institute
State the rgb value of each color on syncretizing effect figure.
Wherein, before step S202 further include: obtain each color lump in the image of projection or pixel
Rgb value, and using each RGB as the preset value of the comparison.
Step S203: if not, the rgb value for the pixel being located at except the preset range is adjusted, make to adjust
The rgb value of each pixel afterwards is within the preset range.
If the rgb value of a certain pixel of Scanning Detction is greater than the range of default rgb value, reduce the pixel
Rgb value so that its within preset range.It is adjusted by the rgb value to each pixel, makes to be incident upon projection screen
Tone is unified on the whole for picture, brightness uniformity, and the whole vision due to the excessive lightness or darkness image frame of local color is avoided to imitate
Fruit.
In addition, the present embodiment is adjusted by the rgb value to each pixel, the seamless spelling of single pixel grade can reach
It connects, only calls Single cell fusion effect picture, avoid improving splicing speed using interative computation.
When the image of two projectors is shown on the projection screen, pattern distortion can be generated.Described image
Distortion generally by projector's radial deformation, axis of projection inclination, project to the reasons such as non-planar screens and cause, the figure between perspective plane
As bunk be as between adjacent projections face boundary mismatch and caused by.So melting in the overlapping region to perspective plane
It is merged before connecing, it is also necessary to which distortion correction is carried out to image.The distortion correction includes geometric correction and alignment correction.Wherein,
Geometric correction refers to that will be incident upon projection screen occurs geometric distortion image rectification into regular several picture.Alignment corrects
Refer to and splice alignment between adjacent projections face picture two-by-two, with the image alignment school between Liang Tai projector perspective plane in the present embodiment
Illustrate the process of alignment correction for just.The embodiment of the present application uses the interactive gridding adjustment programme with establishment each to control
The upper and lower, left and right position of sampling grid in projected channel, and alignment correction is carried out to this, to realize image mosaic, such as Fig. 3 institute
Show, specific the step of being aligned correction is as follows:
Step S301: respectively on first perspective plane and second perspective plane project by groups of samples at rule
Lattice.
Step S302: using the location and shape of lattice on the grid adjustment each perspective plane of rule adjustment, make
The alignment of the lattice on first perspective plane and second perspective plane.Wherein, the grid adjustment rule includes special compiles
The grid adjustment programme of system.
Step S303: it utilizes preset algorithm, such as Triangulation Algorithm to handle the lattice adjusted, obtains
To the geometry vertex for being used as texture mapping；And save the coordinate value on the geometry vertex.
Step S304: obtaining the frame buffer image of each projection device respectively, and by each frame buffer image
As textured pattern；Wherein, each storage unit of the frame buffer corresponds to a pixel on projection screen, entire frame buffer
A corresponding frame image.
Step S305: the textured pattern is mapped on the geometry vertex using mapping technology, and to described
Pattern after mapping is drawn, and the projected image on first perspective plane and second perspective plane alignment is obtained.
It is corrected by Grid Align, can make to be that the image on two perspective planes is completely coincident, realize multiplex projection same
The function of one large screen display.In addition, the geometric correction makes the ginseng according to projection screen the method also includes geometric correction
It number and is calculated with respect to projected position relationship between projector.
The step of specific geometric correction are as follows: sampled point (x0, y0) regular grid pattern formed is incident upon the projection
On screen；According to the size of the projection screen, the parameters such as projected position calculate midpoint (x0, y0) and the reality of frame buffer image
The mapping relations at projection screen image midpoint (x1, y1)；In system operation drawing process, to each frame image in frame buffer
Segmentation texture mapping is carried out according to the mapping relations；The Image Rendering after precorrection is drawn into assembly line again
System processing, the projected image after finally obtaining distortion correction.
It as shown in Figure 7 to 9, is 3 effects of seamless tiled display provided by the embodiments of the present application on the projection screen
Figure.This 3 figures respectively indicate that Liang Ge projector shows on large screen it is seamless spliced before, during seamless spliced and seamless spelling
Schematic diagram after connecing.
Method provided in this embodiment has the following characteristics that compared with existing some multi-channel projection systems
Geometric correction or alignment correction algorithm and bottom multi-project mode virtual environment system it is mutually indepedent, and with visitor
The program of family application is also mutually indepedent, has preferable expansion.
The bearing calibration adjusted based on software combination man-machine interactively is used for the geometric correction of system, correction accuracy is high,
It can reach the seamless spliced of single pixel grade；The geometric correction algorithm has only used primary correction to convert, and is not transported using iteration
It calculates, so calculating speed is fast, corrects high-efficient.
In another embodiment of the application, a kind of seamless spliced device of projection screen is additionally provided, is applied to above-mentioned
The projection screen seamless joint method that embodiment provides, as shown in figure 4, described device includes: acquiring unit 410, brightness regulation
Unit 420, call unit 430 and pixel adjustment unit 440.
Acquiring unit 410, for obtaining two perspective planes being incident upon on the projection screen by two projection devices, institute
Stating two perspective planes is the first perspective plane and the second perspective plane；And the overlay region on first perspective plane and the second perspective plane
Domain.
Brightness adjusting unit 420, for carrying out brightness to the overlapping region on first perspective plane and the second perspective plane
Attenuation adjustable, and the brightness syncretizing effect figure after being adjusted；
Wherein, the brightness adjusting unit 420 is specifically used for: being adjusted to the lumen on the overlapping region, makes to adjust
Lumen after section is identical as the lumen on first perspective plane or second perspective plane.
Call unit 430, for bright described in every frame image call to first perspective plane and second perspective plane
Spend syncretizing effect figure；
Pixel adjustment unit 440, for being adjusted using pixel of the mapping technology to the overlapping region, so that
The image of the overlapping region is blended with the image on the projection screen in addition to the overlapping region.
The image blends the seam for referring to and eliminating overlapping region, makes other in the brightness and projection screen of overlapping region
The brightness of image is identical, and the picture of entire projection screen is made to have overall effect, imitates with the screen for having projector to show with one
Fruit is identical.
Device provided in this embodiment reduces the brightness of overlapping region by brightness adjusting unit first, this is adjusted to entirety
Coarse adjustment keeps the brightness of overlapping region identical as the brightness of images other on projection screen, then passes through call unit and pixel tune
Each pixel of overlapping region is adjusted in section unit, this is adjusted to the careful adjusting in part, overlapping region is divided into multiple
Pixel compartments are adjusted by the rgb value to each pixel unit lattice, and then eliminate the gap of two perspective planes splicing, so that
The image of the overlapping region is blended with the image on the projection screen in addition to the overlapping region.
Further, the call unit 430 is specifically used for, by the brightness syncretizing effect figure respectively with bitmap file lattice
Formula is stored in described two projection devices；The brightness of the bitmap file format is called on each projection device respectively
Syncretizing effect figure.
The bitmap file format includes: JPG, the formats such as GIF.GIF.BMP, PDF, by by fused effect picture with
Bitmap file format storage, so as to carry out the adjusting of local pixel (such as rgb value) to the image of projection device projection.
Further, the pixel adjustment unit 440 includes:
Scanning element 4401 for scanning each pixel of the overlapping region, and obtains each pixel
Rgb value.
Judging unit 4402, for whether within a preset range to judge the rgb value of each pixel.
The pixel adjustment unit 4403, when for being located at except preset range there are the rgb value of some pixel, then
The rgb value for the pixel being located at except the preset range is adjusted, makes the rgb value within the preset range.
Optionally, adjust pixel rgb value can by operator's human eye recognize pixel rgb value whether with other projection screens
On color of image match.
Further, as shown in figure 5, the device further include: alignment unit 450, for adjacent projections face picture two-by-two
Between splice alignment, specifically the alignment unit includes: grid projecting unit 4501, grid adjustment unit 4502, and processing is single
Member 4503, frame buffer image acquisition unit 4504 and textured pattern map unit 4505.
Grid projecting unit 4501, for projecting on first perspective plane and second perspective plane by sampling respectively
The regular grid pattern of point composition.
Grid adjustment unit 4502, for the position using lattice on the grid adjustment each perspective plane of rule adjustment
It sets and shape, is aligned the lattice on first perspective plane and second perspective plane.
Processing unit 4503 is used for being handled the lattice trigonometric ratio adjusted using preset algorithm
Make the geometry vertex of texture mapping.
Frame buffer image acquisition unit 4504, for obtaining the frame buffer image of each projection device respectively, and will
Each frame buffer image is as textured pattern.
Textured pattern map unit 4505, for the textured pattern to be mapped to the geometry using mapping technology
On vertex, and the pattern after the mapping is drawn, obtain first perspective plane and second perspective plane alignment
Projected image.
The device that present aspect provides makes the grid on the first perspective plane and the second perspective plane by sampled point and trigonometric ratio processing
Pattern registration, and then the correction of the alignment to two perspective planes is realized, avoid image when seamless spliced from causing due to being misaligned
Ghost phenomena.
In addition, the embodiment of the present application also provides a kind of computer storage medium, wherein the computer storage medium can store
There is program, which may include in a kind of each implementation of projection screen seamless joint method provided by the present application when executing
Part or all of step.The storage medium can be magnetic disk, CD, read-only memory (read-only memory, letter
Claim ROM) or random access memory (random access memory, abbreviation RAM) etc..
It is required that those skilled in the art can be understood that the technology in the embodiment of the present invention can add by software
The mode of general hardware platform realize.Based on this understanding, the technical solution in the embodiment of the present invention substantially or
Say that the part that contributes to existing technology can be embodied in the form of software products, which can deposit
Storage is in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that computer equipment (can be with
It is personal computer, server or the network equipment etc.) execute certain part institutes of each embodiment of the present invention or embodiment
The method stated.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system and
For Installation practice, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to method
The part of embodiment illustrates.
The embodiments of the present invention described above are not intended to limit the scope of the present invention.It is any in the present invention
Spirit and principle within made modifications, equivalent substitutions and improvements etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of projection screen seamless joint method, which is characterized in that this method is used for two to display on the projection screen
Or more than two projected images carry out anastomosing and splicing, which comprises
It obtains and is incident upon two perspective planes on the projection screen by two projection devices, described two perspective planes are the first throwing
The overlapping region on shadow face and the second perspective plane and first perspective plane and the second perspective plane；
Brightness decay adjusting is carried out to the overlapping region, and generates the brightness syncretizing effect figure after adjusting；
Brightness syncretizing effect figure described in every frame image call to first perspective plane and second perspective plane；
It is adjusted using pixel of the mapping technology to the overlapping region, so that the shadow of the overlapping region after adjusting
As being blended with the image on the projection screen in addition to the overlapping region.
2. the method according to claim 1, wherein to the every of first perspective plane and second perspective plane
Syncretizing effect figure described in frame image call includes:
The brightness syncretizing effect figure is stored in described two projection devices with bitmap file format respectively；
The brightness syncretizing effect figure of the bitmap file format is called on each projection device respectively.
3. the method according to claim 1, wherein it is described using mapping technology to the overlapping region
Pixel, which is adjusted, includes:
Each pixel of the overlapping region is scanned, and obtains the rgb value of each pixel；
Whether within a preset range to judge the rgb value of each pixel；
If not, the rgb value for the pixel being located at except the preset range is adjusted, make each pixel after adjusting
Rgb value is within the preset range.
4. the method according to claim 1, wherein to the overlapping on first perspective plane and the second perspective plane
Region carries out brightness decay adjusting and specifically includes:
Obtain the lumen on the overlapping region；
Lumen on the overlapping region is adjusted, the lumen after adjusting and first perspective plane or second throwing are made
The lumen in shadow face is identical.
5. method according to any one of claims 1 to 4, which is characterized in that the method also includes: it throws described first
The image of shadow face and second perspective plane projection carries out alignment correction, specifically:
Respectively on first perspective plane and second perspective plane project by groups of samples at regular grid pattern；
Using the location and shape of lattice on the grid adjustment each perspective plane of rule adjustment, make first perspective plane
It is aligned with the lattice on second perspective plane；
The lattice adjusted is handled using preset algorithm, obtains the geometry vertex as texture mapping；
The frame buffer image of each projection device is obtained respectively, and using each frame buffer image as textured pattern；
The textured pattern is mapped on the geometry vertex using mapping technology, and to the pattern after the mapping into
Row is drawn, and the projected image on first perspective plane and second perspective plane alignment is obtained.
6. a kind of seamless spliced device of projection screen, which is used for display on the projection screen two or more
Projected image carries out anastomosing and splicing, which is characterized in that described device includes:
Acquiring unit, it is described two for obtaining two perspective planes being incident upon on the projection screen by two projection devices
Perspective plane is the overlapping region on the first perspective plane and the second perspective plane and first perspective plane and the second perspective plane；
Brightness adjusting unit for carrying out brightness decay adjusting to the overlapping region, and generates the brightness fusion effect after adjusting
Fruit figure；
Call unit is merged for brightness described in every frame image call to first perspective plane and second perspective plane and is imitated
Fruit figure；
Pixel adjustment unit, for being adjusted using pixel of the mapping technology to the overlapping region, so that after adjusting
The image of the overlapping region blended with the image on the projection screen in addition to the overlapping region.
7. device according to claim 6, which is characterized in that
The call unit, it is described two specifically for the brightness syncretizing effect figure to be stored in respectively with bitmap file format
In projection device, the brightness syncretizing effect figure of the bitmap file format is called on each projection device respectively.
8. device according to claim 6, which is characterized in that the pixel adjustment unit includes:
Scanning element for scanning each pixel of the overlapping region, and obtains the rgb value of each pixel；
Judging unit, for whether within a preset range to judge the rgb value of each pixel；
The pixel adjustment unit, for if not, being adjusted to the rgb value for the pixel being located at except the preset range
Section makes the rgb value of each pixel after adjusting within the preset range.
9. device according to claim 6, which is characterized in that
The acquiring unit is also used to obtain the lumen on the overlapping region；
The brightness adjusting unit, specifically for the lumen on the overlapping region is adjusted, make the lumen after adjusting with
The lumen on first perspective plane or second perspective plane is identical.
10. according to the described in any item devices of claim 6 to 9, which is characterized in that device further include: alignment unit, wherein
The alignment unit includes:
Grid projecting unit, for respectively on first perspective plane and second perspective plane project by groups of samples at
Regular grid pattern；
Grid adjustment unit, for adjusting the position of lattice and shape on each perspective plane of rule adjustment using grid
Shape is aligned the lattice on first perspective plane and second perspective plane；
Processing unit obtains being used as texture mapping for handling the lattice adjusted using preset algorithm
Geometry vertex；
Frame buffer image acquisition unit, for obtaining the frame buffer image of each projection device respectively, and will be each described
Frame buffer image is as textured pattern；
Textured pattern map unit, for the textured pattern to be mapped to the geometry vertex using mapping technology,
And the pattern after the mapping is drawn, obtain the perspective view on first perspective plane and second perspective plane alignment
Picture.
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