CN109996053A - A kind of projecting method and optical projection system applied to outside vertical surface of building - Google Patents
A kind of projecting method and optical projection system applied to outside vertical surface of building Download PDFInfo
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- CN109996053A CN109996053A CN201910284500.5A CN201910284500A CN109996053A CN 109996053 A CN109996053 A CN 109996053A CN 201910284500 A CN201910284500 A CN 201910284500A CN 109996053 A CN109996053 A CN 109996053A
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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
- H04N9/3185—Geometric adjustment, e.g. keystone or convergence
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- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of projecting methods and optical projection system applied to outside vertical surface of building, belong to projection art, and method includes: the outer profile for obtaining target construction；According to the outer profile of target construction and default projection ratio, the alien invasion region of target construction is divided into multiple rectangular projection regions；According to multiple rectangular projection regions, multiple projectors are laid in target structures beyond the region of objective existence；The respective crevice projection angle of multiple projectors is adjusted, and the geometric correction of imagery and image co-registration are carried out to multiple projectors, until multiple projectors respectively project to the projected image on the alien invasion of target construction and form a width complete image.The embodiment of the present invention is directly launched on facade by using whole building alien invasion as projection screen, and by projected image by multiple projectors, to realize the perfect combination of projected image and facade, finally builds optimal visual effect.
Description
Technical field
The present invention relates to projection art more particularly to a kind of projecting methods and projection applied to outside vertical surface of building
System.
Background technique
The projection screen of existing optical projection system is mostly simple shape, such as plane, arc, annular or spherical.It is throwing
The effect of the presentation content presented on shadow screen is set off by contrast by the production quality of image itself mostly, and projection screen is only
Simple atmosphere construction function can be provided.
Since the projection screen of optical projection system can only provide simple atmosphere construction function, while projection screen also limits to
In can only be built in space indoors, therefore existing optical projection system is caused to be unable to satisfy the application demand of grander scene.
Summary of the invention
In order to solve problems in the prior art, the embodiment of the invention provides a kind of projections applied to outside vertical surface of building
Method and optical projection system, by using whole building alien invasion as projection screen, and projected image is straight by multiple projectors
Dispensing is connect on facade, to realize the perfect combination of projected image and facade, is finally built best
Visual effect.
Specific technical solution provided in an embodiment of the present invention is as follows:
In a first aspect, providing a kind of projecting method applied to outside vertical surface of building, which comprises
Obtain the outer profile of target construction；
According to the outer profile of the target construction and default projection ratio, by the alien invasion location of the target construction
Domain is divided into multiple rectangular projection regions；
According to the multiple rectangular projection region, multiple projectors are laid in the target structures beyond the region of objective existence；
Adjust the respective crevice projection angle of the multiple projector, and to the multiple projector carry out the geometric correction of imagery with
Image co-registration, until the multiple projector respectively projects to the composition of the projected image on the alien invasion of the target construction one
Width complete image.
Further, the outer profile for obtaining target construction, comprising:
The point cloud data of the target construction is obtained based on lidar measurement mode or oblique photograph measurement method；
The outer profile of the target construction is extracted from the point cloud data of the target construction.
Further, the outer profile according to the target construction and default projection ratio, in the target construction
Alien invasion region on be divided into multiple projection rectangle regions, comprising:
Determine the minimum circumscribed rectangle of the outer profile of the target construction；
Construct multiple rectangular projection regions that the ratio between long side and short side are equal to the default projection ratio, and the multiple rectangle
The minimum circumscribed rectangle is completely covered in view field.
Further, described according to the multiple rectangular projection region, multiple projections are laid in the target structures beyond the region of objective existence
Machine, comprising:
According to projector's parameter of the multiple rectangular projection region, according to preset formula calculate the multiple projector with
The distance between the alien invasion of the target construction；
According to the multiple projector at a distance from the alien invasion of the target construction, in the target structures beyond the region of objective existence cloth
If multiple projectors.
Further, the preset formula are as follows: d=L*f, wherein d be the alien invasion of projector and target construction away from
From L is the length of rectangular projection region, and f is projector lens focal length.
Further, the projected image that the multiple projector respectively projects be according to the quantity of the multiple projector and
Installation position is split complete image to be projected.
Further, the process of described image fusion includes:
Determine the image overlapping region between the adjacent image in the respective projected image of the multiple projector；
Feature Points Matching is carried out to the image overlapping region between the adjacent image, to obtain the characteristic point to match
Collection；
Based on the feature point set to match, the adjacent image is registrated to the same coordinate system；
Splicing fusion is carried out to the adjacent image after registration.
Second aspect, provides a kind of optical projection system, and the optical projection system includes based on projection side described in first aspect
Multiple projectors that method is laid.
Further, the multiple projector is in matrix arrangement towards the alien invasion of the target construction.
The embodiment of the present invention provides a kind of projecting method and optical projection system applied to outside vertical surface of building, by will be entire
Facade is directly launched on facade as projection screen, and by projected image by multiple projectors, thus
The perfect combination of projected image and facade is realized, optimal visual effect is finally built.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 shows a kind of flow chart of projecting method applied to outside vertical surface of building；
Fig. 2 shows the flow charts of step S1 in Fig. 1；
Fig. 3 shows the flow chart of step S2 in Fig. 1；
Fig. 4 shows the flow chart of step S3 in Fig. 1；
Fig. 5 shows the flow chart of step S4 image co-registration in Fig. 1.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment one
Shown in referring to Fig.1, the embodiment of the invention provides a kind of projecting method applied to outside vertical surface of building, this method
May include step:
S1, the outer profile for obtaining target construction.
Wherein, as shown in Fig. 2, the specific implementation of step S1 may include:
S11, the point cloud data that target construction is obtained based on lidar measurement mode or oblique photograph measurement method.
Specifically, the point cloud number of target construction is obtained using lidar measurement mode or oblique photograph measurement method
According to, wherein it include the three-dimensional of the multiple measuring points and each measuring point at the top of the target construction in the point cloud data of the target construction
Coordinate.
S12, the outer profile that target construction is extracted from the point cloud data of target construction.
Specifically, acquired point cloud data is sent to data processing equipment；
Caused by data processing equipment removal point cloud data due to outside environmental elements and instrument itself problem
Noise；
The outer profile point of target construction is extracted, from the point cloud data after denoising to obtain multiple outer profile points；
Multiple outer profile points are attached, the outer contour of target construction is formed；
In above-described embodiment, one is the point cloud data from the target construction obtained based on lidar measurement technology into
The extraction of row target construction outer profile, one is the point cloud numbers from the target construction obtained based on oblique photograph measurement method
It can choose any of which mode as needed according to the extraction for carrying out target construction outer profile and carry out target construction
The extraction of outer profile can also carry out the extraction of target construction outer profile by organically combining both modes.
S2, outer profile and default projection ratio according to target construction, the alien invasion region of target construction is drawn
It is divided into multiple rectangular projection regions.
Wherein, the alien invasion of target construction is alien invasion to be projected.
Wherein, as shown in figure 3, the specific implementation of step S2 may include:
S21, determine target construction outer profile minimum circumscribed rectangle.
S22, building the ratio between long side and short side are equal to multiple rectangular projection regions of default projection ratio, and multiple rectangular projections
Minimum circumscribed rectangle is completely covered in region.
Wherein, projection is preset than that can be 4:3,16:9 or 16:10, different projection ratios can also be selected, to construct not
Multiple rectangular projection regions of similar shape.
In order to ensure the alien invasion of target construction can be covered by image completely, when dividing rectangular projection region, first
Side length using the highest point of target construction as standard point, according to default projection than determining rectangular area.Here with the throwing of 16:10
It penetrates and carries out rectangular partition than for, it is assumed that the bond length of rectangular projection region, can be true according to projection ratio on the basis of 3 meters
The long side length for determining rectangular projection region is 4.8 meters.If the height of target construction is more than 4.8 meters, need to build in target
Build in the short transverse of object determine at least two rectangular projection regions, if the height of target construction less than 4.8 meters, in mesh
It marks and determines a rectangular projection region in the short transverse of building.
In the embodiment of the present invention, multiple rectangular projection areas of default projection ratio are equal to by building the ratio between long side and short side
Domain, and minimum circumscribed rectangle is completely covered in multiple rectangular projection regions, it can be ensured that the alien invasion of target construction can be complete
It is covered by the projected image of multiple projectors of subsequent laying.
S3, according to multiple rectangular projection regions, lay multiple projectors in target structures beyond the region of objective existence.
Wherein, as shown in figure 4, the specific implementation of step S3 may include:
S31, projector's parameter according to multiple rectangular projection regions calculate multiple projectors and target according to preset formula
The distance between alien invasion of building.
Specifically, multiple rectangular projection regions correspondence first can be distributed into multiple projectors to be laid, according to default
Formula d=L*f calculates the distance between the alien invasion of multiple projectors and target construction, wherein d is projector and target
The distance of the alien invasion of building, L are the length of rectangular projection region, and f is projector lens focal length.
S32, according to multiple projectors at a distance from the alien invasion of target construction, lay multiple throwings in target structures beyond the region of objective existence
Shadow machine.
Specifically, according to multiple projectors at a distance from the alien invasion of target construction, the laying of each projector is determined
Position, according to the installation position of each projector, multiple projectors are built in completion.Wherein, multiple projectors can be in the square of x*y
Alien invasion of the battle array arrangement ground towards target construction.
S4, the multiple respective crevice projection angles of projector of adjustment, and the geometric correction of imagery and image are carried out to multiple projectors
Fusion, until multiple projectors respectively project to the projected image on the alien invasion of target construction and form a width complete image.
Specifically, complete image to be projected is split to obtain according to the quantity of multiple projectors and installation position more
The projected image that a projector respectively projects, and it is transmitted to each projector；
The crevice projection angle for adjusting each projector carries out the geometric correction of imagery and image co-registration to multiple projectors, until
Multiple projectors respectively project to the projected image on the alien invasion of target construction and form a width complete image.
Wherein, the process of the geometric correction of imagery can specifically include in step S4:
Automatic non-linear geometry correction is carried out to the respective projected image of multiple projectors, so that multiple projectors are respective
The equal rectangular shaped of projected image.
In the present embodiment, since place limitation or the excessively high placement position for leading to projector of facade are non-horizontal
Position, so that projector is exactly non-rectangular shape when the image projection projected is to alien invasion, but it is trapezoidal.By right
Multiple projectors carry out the geometric correction of imagery, enable to non-rectangle shape correction in a rectangular shape, to ensure each projection
The image that machine is projected out does not deform.
Wherein, as shown in figure 5, the process of image co-registration can specifically include in step S4:
S41, image overlapping region between adjacent image in the respective projected image of multiple projectors is determined.
Specifically, the multiple images block of adjacent image is extracted respectively, and obtains the image block to match between adjacent image
Set, according to the image block set to match, determines the image overlapping region between adjacent image.
S42, Feature Points Matching is carried out to the image overlapping region between adjacent image, to obtain the characteristic point to match
Collection.
Specifically, all characteristic points in the image block set to match are extracted using ORB algorithm, it is each to what is extracted
Characteristic point distinguishes construction feature point description；And feature point description according to each characteristic point, using Euclidean distance algorithm
Feature Points Matching is carried out to the image overlapping region of adjacent image, to obtain the feature point set to match.
S43, based on the feature point set to match, adjacent image is registrated to the same coordinate system.
Specifically, based on the feature point set to match, the transition matrix between adjacent image is calculated, it will by transition matrix
Adjacent image is converted to the same coordinate system.
S44, splicing fusion is carried out to the adjacent image after registration.
Specifically, right based on the characteristic point respective positions relationship to match between adjacent image under the same coordinate system
Adjacent image is spliced, and is obtained a complete stitching image, and carry out fusion treatment to stitching image, is generated multiple fusions
Band image, and brightness processed is carried out to multiple fusion band images, form final projected image.
In the present embodiment, by adjusting the respective crevice projection angle of multiple projectors, and it is several to carry out image to multiple projectors
What correction and image co-registration, eliminate the distortion of projected image, and ensure multiple projectors projected image brightness it is consistent
Property.
Projecting method provided in an embodiment of the present invention applied to outside vertical surface of building, by making whole building alien invasion
For projection screen, and projected image is directly launched on facade by multiple projectors, to realize perspective view
As the perfect combination with facade, optimal visual effect is finally built.
Embodiment two
The embodiment of the present invention also provides a kind of optical projection system, which includes based on the above embodiment one projection side
Multiple projectors that method is laid.
Wherein, multiple projectors are in matrix arrangement towards the alien invasion of target construction.
In the present embodiment, after completing to lay each projector, according to the quantity of multiple projectors and position can be laid
It sets and is split to obtain the projected image that multiple projectors respectively project to complete image to be projected, and be transmitted to each projection
Machine, and the crevice projection angle of each projector of adjustment, and image geometry school is carried out to multiple projectors by projection control equipment
Just with image co-registration, until multiple projectors respectively project to the projected image on the alien invasion of target construction form one it is complete
Whole image.
Specifically, complete image to be projected is split to obtain according to the quantity of multiple projectors and installation position more
The projected image that a projector respectively projects, and it is transmitted to each projector.
Optical projection system provided in this embodiment, by using whole building alien invasion as projection screen, and by projected image
It is directly launched on facade by multiple projectors, to realize the perfect knot of projected image and facade
It closes, finally builds optimal visual effect.
All the above alternatives can form alternative embodiment of the invention using any combination, herein no longer
It repeats one by one.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of projecting method applied to outside vertical surface of building, which is characterized in that the described method includes:
Obtain the outer profile of target construction；
According to the outer profile of the target construction and default projection ratio, the alien invasion region of the target construction is drawn
It is divided into multiple rectangular projection regions；
According to the multiple rectangular projection region, multiple projectors are laid in the target structures beyond the region of objective existence；
The respective crevice projection angle of the multiple projector is adjusted, and the geometric correction of imagery and image are carried out to the multiple projector
Fusion, until the multiple projector respectively project to the projected image on the alien invasion of the target construction form one it is complete
Whole image.
2. the method according to claim 1, wherein the outer profile for obtaining target construction, comprising:
The point cloud data of the target construction is obtained based on lidar measurement mode or oblique photograph measurement method；
The outer profile of the target construction is extracted from the point cloud data of the target construction.
3. the method according to claim 1, wherein the outer profile according to the target construction and default
Ratio is projected, multiple projection rectangle regions are divided on the alien invasion region of the target construction, comprising:
Determine the minimum circumscribed rectangle of the outer profile of the target construction；
Construct multiple rectangular projection regions that the ratio between long side and short side are equal to the default projection ratio, and the multiple rectangular projection
The minimum circumscribed rectangle is completely covered in region.
4. according to claim 1 to method described in 3 any one, which is characterized in that described according to the multiple rectangular projection
Multiple projectors are laid in the target structures beyond the region of objective existence in region, comprising:
According to projector's parameter of the multiple rectangular projection region, according to preset formula calculate the multiple projector with it is described
The distance between alien invasion of target construction；
According to the multiple projector at a distance from the alien invasion of the target construction, laid in the target structures beyond the region of objective existence more
A projector.
5. according to the method described in claim 4, it is characterized in that, the preset formula are as follows: d=L*f, wherein d is projector
At a distance from the alien invasion of target construction, L is the length of rectangular projection region, and f is projector lens focal length.
6. the method according to claim 1, wherein the projected image that the multiple projector respectively projects is root
Complete image to be projected is split according to the quantity and installation position of the multiple projector.
7. method according to claim 1 or 6, which is characterized in that described image fusion process include:
Determine the image overlapping region between the adjacent image in the respective projected image of the multiple projector；
Feature Points Matching is carried out to the image overlapping region between the adjacent image, to obtain the feature point set to match；
Based on the feature point set to match, the adjacent image is registrated to the same coordinate system；
Splicing fusion is carried out to the adjacent image after registration.
8. a kind of optical projection system, which is characterized in that the optical projection system includes being based on the described in any item throwings of claim 1 to 7
Multiple projectors that image method is laid.
9. optical projection system according to claim 8, which is characterized in that the multiple projector is in matrix arrangement towards institute
State the alien invasion of target construction.
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| CN112183301A (en) * | 2020-09-23 | 2021-01-05 | 武汉大势智慧科技有限公司 | Building floor intelligent identification method and device |
| CN113096219A (en) * | 2021-03-08 | 2021-07-09 | 广州新起典文旅科技有限公司 | Light control method and device |
| CN114264660A (en) * | 2021-12-03 | 2022-04-01 | 国网黑龙江省电力有限公司电力科学研究院 | Transmission line tower surface defect detection method and device based on green laser imaging |
| CN115648847A (en) * | 2022-10-26 | 2023-01-31 | 东莞市皓龙激光科技有限公司 | Laser decoration method, system and storage medium |
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