CN110310367A - Based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method - Google Patents
Based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method Download PDFInfo
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- CN110310367A CN110310367A CN201910594954.2A CN201910594954A CN110310367A CN 110310367 A CN110310367 A CN 110310367A CN 201910594954 A CN201910594954 A CN 201910594954A CN 110310367 A CN110310367 A CN 110310367A
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Abstract
The present invention relates to be based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method, comprising the following steps: S1, data acquisition；Collected data information is imported in three-dimensional reconstruction software and is handled by S2, data prediction；S3, oblique photograph java standard library and monitoring element information database are established, the database includes true scene data library and various dimensions 2.5D raster pyramid tile data library；The data of scene selected by user are showed user by S4, data publication and displaying；The present invention realizes light weight level display, solves the problems, such as that large scene high-precision map is difficult rapidly and efficiently to access in network-side, meanwhile, the requirement at the end PC and mobile terminal access configuration and flow is greatly reduced, realizes the widespread adoption of outdoor scene three-dimensional data.
Description
Technical field
The present invention relates to computer application technologies, are specifically based on large scene outdoor scene three-dimensional multi-angle 2.5D shadow
As lightweight browsing method.
Background technique
Along with the fast development of China's modern city, the scale in city constantly expands, and the planning and construction in city are not only
It is related to the development in city, and is more related to the quality of the life of resident.The space that we live is based on three-dimensional data, institute
See think all be it is three-dimensional, three-dimensional.GIS application based on traditional two-dimensional surface data is difficult to meet us for this
The data requirements of complicated city system, the adjustment that cannot achieve visualization, intuitively change are built in scheme in urban planning report and are existed
Bigger defect, is planned and is managed by 2-D data and increasingly denounced by people.And D Urban model
As the integrated technology for having gathered computer technology, geographical information technology, virtual reality technology, can for urban planning with build
If providing better opportunity to develop.
With the rapid development of 3-D technology, threedimensional model has become the core medium of expression product information, due to three
Dimension module can really, vivo express three-dimensional spatial information, it is strong that technique information expresses intuitive, hands over convenient for three-dimensional between personnel
Stream, and due to its detailed geometric description with building element and its structural relation of three-dimensional building object model, and there is high-fidelity
This feature of property, obtains more and more extensive approval, and gradually replace traditional two-dimensional data in the application.
But threedimensional model source data complexity is high, data scale is huge, as the requirement of city model data is more next
Higher, the growth of current graphics hardware processing capacity still far lags behind the three-dimensional data scale of surge, upload data or into
When row browsing, it inevitably will lead to such model and be difficult to efficiently be drawn so that picture delay or opening file
It needs to take a long time and institute's transmitting file geological information missing can not even upload so that situations such as information is lost.
Based on this, for the limitation of the prior art, the invention proposes a kind of light weights of various dimensions 2.5D threedimensional model
Change browser technology.
Summary of the invention
In order to solve above-mentioned problems of the prior art, the present invention, which provides, is based on large scene outdoor scene three-dimensional multi-angle
2.5D image lightweight browsing method guarantees that large scene, high accuracy three-dimensional model can be in most terminal and network rings
It being capable of the operation smooth in the case where not losing of high-fidelity, information under border.
The technical solution adopted by the present invention to solve the technical problems is:
According to embodiment of the present invention, it provides clear based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight
Look at method, comprising the following steps:
S1, data acquisition, according to field condition, are made an on-the-spot survey on the spot and are laid artificial target, further according to live feelings on the spot
Condition is arranged that optimal unmanned plane row is high and flight course planning, in scanning process according to circumstances phased point, survey area's topography and landform character
And modeling accuracy lays ground control point, and the integrality of scan data is checked after the completion of scanning；
Collected data information is imported in three-dimensional reconstruction software and is handled by S2, data prediction；
S3, oblique photograph java standard library and monitoring element information database are established, the database includes true three-dimensional scenic number
According to library and various dimensions 2.5D raster pyramid tile data library；
The data of scene selected by user are showed user by S4, data publication and displaying.
Preferably, in the step S1, the endlap of unmanned plane oblique photograph flight must not be lower than 80%, sidelapping
60% must not be lower than.
Preferably, in the step S1, ground control point is laid specifically, using GNSS real-time dynamic positioning system RTK
Measuring instrument cooperates total station, level and locality CORS co-ordinate system information, measures the three-dimensional coordinate at control point, for
The physical location at each control point is marked, for all control points in the distribution core overall distribution figure for surveying area.
Preferably, in the step S2, three-dimensional reconstruction software processing include photograph beautification, photo control point selection,
Thorn point, aerial triangulation and the Model Reconstruction of photo control point, the Model Reconstruction further include later road pavement and floor
Carry out refine and beautification.
Preferably, the specific steps in true scene data library are established are as follows:
After three-dimensional reconstruction data prediction, data are built up with the true 3 d model library of LOD tree pyramid of standard；
Original true three-dimensional data is recombinated, the data that real-time rendering uses are obtained；
Wherein, object generates the simplification mould of several different resolutions according to different control errors before drafting in advance
Type, when drawing, according to the position of object distance pilot, the screen error that user allows calculates the maximum allowable mistake of actual object
Difference.
Preferably, when object is drawn, the specific steps are selection control error is less than or equal to maximum in multiple simplified models
Allowable error and with the most similar model of the limits of error, recalculate the limits of error when pilot change in location and select
Corresponding simplified model is selected to be drawn.
Preferably, the specific steps in various dimensions 2.5D raster pyramid tile data library are established are as follows:
2.5D grid map comprising the three-dimensional multiple rotation dimensions of outdoor scene is generated to be put in storage with pyramid slice, the various dimensions of building
2.5D raster pyramid tile data library；
Outdoor scene threedimensional model is divided according to every 15 ° for a visual angle, and to the outdoor scene threedimensional model at each visual angle
Generate the raster data of 2.5D；
The threedimensional model that structure is complicated, data volume is huge is changed into 2.5D grille picture；
Pyramid slice, the various dimensions 2.5D raster pyramid tile data of building are carried out to 2.5D grille picture data.
Preferably, the step of pyramid slice being carried out to 2.5D grille picture data specifically:
A, the pictorial element of slice is obtained, is labeled as the 0th layer, and the tomographic image data are divided into 256 × 256 size numbers
According to block, and record respective coordinates position (X, Y)；
B, using the pictorial element center of preceding layer as basic point, row, column size is reduced according to set proportion, then sampled
And mark the number of plies；
C, it repeats step b and has reached the set number of plies to the total amount of data obtained is sampled；
D, by the obtained pictorial element of sampling by the sequential build digital slices pyramid of label.
Compared with prior art, the beneficial effects of the present invention are:
The present invention realizes light weight level display, solves what large scene high-precision map was difficult rapidly and efficiently to access in network-side
Problem, meanwhile, the requirement at the end PC and mobile terminal access configuration and flow is greatly reduced, realizes answering on a large scale for outdoor scene three-dimensional data
With.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is flow diagram of the invention；
Fig. 2 is the effect diagram that 2.5D is bonded with true three-dimensional live in one embodiment of the invention；
Fig. 3 is the result of browse schematic diagram of different angle 2.5D grid tile in one embodiment of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, the present invention provides large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method is based on,
The following steps are included:
S1, data acquisition, according to field condition, are made an on-the-spot survey on the spot and are laid artificial target, further according to live feelings on the spot
Condition is arranged that optimal unmanned plane row is high and flight course planning, in scanning process according to circumstances phased point, survey area's topography and landform character
And modeling accuracy lays ground control point, control points layout should follow the principle of " being reasonably distributed, area's precision is surveyed in effectively control ",
Test leakage in order to prevent checks the integrality of scan data after the completion of scanning；
Collected data information is imported in three-dimensional reconstruction software and is handled by S2, data prediction；
S3, oblique photograph java standard library and monitoring element information database are established, the database includes true three-dimensional scenic number
According to library and various dimensions 2.5D raster pyramid tile data library；
The data of scene selected by user are showed user by S4, data publication and displaying.
In the above-mentioned technical solutions, the present invention is sliced skill using space technology, computer vision technique, raster pyramid
Art splits a large amount of three-dimensional space data according to the 2.5D that Spatial Dimension carries out any various dimensions.When browsing any angle three
When dimension module, it is similar to the picture tile map of currently used any 2.5D in fact, thus portion big absolutely for market
It experiences and feels in vision and information content or initial three-dimensional data for point terminal, but the multi-angle for being in data structure
2.5D picture, in the case where the hi-fi and information for guaranteeing data are not lost, data volume and hardware configuration are required substantially
It reduces, promotes the complicated outdoor scene threedimensional model viewing experience of large scene, be substantially similar to the operation of current Internet map.
Effectively solve the application covering of the full user group of a wide range of various dimensions of outdoor scene three-dimensional data.Meanwhile being based on oblique photograph true three
Dimension module construct a set of outdoor scene monitoring system and its will real time monitoring and very three-dimensional seamless combination, effective solution monitoring with
The problem of two-dimensional map blind area.
When it is implemented, in order to guarantee the quality of true three-dimensional modeling data, unmanned plane oblique photograph flies in the step S1
Capable endlap must not be lower than 80%, and sidelapping must not be lower than 60%.
When it is implemented, laying ground control point specifically, using GNSS real-time dynamic positioning system in the step S1
RTK measuring instrument cooperates total station, level and locality CORS co-ordinate system information, measures the three-dimensional coordinate at control point, needle
It marks to the physical location at each control point, for all control points in the distribution core overall distribution figure for surveying area.
When it is implemented, the processing of three-dimensional reconstruction software includes the beautification of photograph, photo control point choosing in the step S2
Select, the thorn of photo control point point, aerial triangulation and Model Reconstruction, due to during oblique photograph due to weather, optical fiber
And the influence of on-site actual situations will affect the display quality of data, further include road pavement and floor after the Model Reconstruction
Carry out refine and beautification.
When it is implemented, establishing the specific steps in true scene data library are as follows:
After three-dimensional reconstruction data prediction, data are built up with the true 3 d model library of LOD tree pyramid of standard；
Original true three-dimensional data is recombinated, the data that real-time rendering uses are obtained；
Wherein, object generates the simplification mould of several different resolutions according to different control errors before drafting in advance
Type, when drawing, according to the position of object distance pilot, the screen error that user allows calculates the maximum allowable mistake of actual object
Difference.
When it is implemented, the specific steps are selection control error is less than or equal in multiple simplified models when object is drawn
The limits of error and with the most similar model of the limits of error, recalculate the limits of error when pilot change in location
And corresponding simplified model is selected to be drawn.
When it is implemented, establishing the specific steps in various dimensions 2.5D raster pyramid tile data library are as follows:
2.5D grid map comprising the three-dimensional multiple rotation dimensions of outdoor scene is generated to be put in storage with pyramid slice, the various dimensions of building
2.5D raster pyramid tile data library；
Outdoor scene threedimensional model is divided according to every 15 ° for a visual angle, and to the outdoor scene threedimensional model at each visual angle
Generate the raster data of 2.5D；
The threedimensional model that structure is complicated, data volume is huge is changed into 2.5D grille picture；
Pyramid slice, the various dimensions 2.5D raster pyramid tile data of building are carried out to 2.5D grille picture data.
When it is implemented, the step of carrying out pyramid slice to 2.5D grille picture data specifically:
A, the pictorial element of slice is obtained, is labeled as the 0th layer, and the tomographic image data are divided into 256 × 256 size numbers
According to block, and record respective coordinates position (X, Y)；
B, using the pictorial element center of preceding layer as basic point, row, column size is reduced according to set proportion, then sampled
And mark the number of plies；
C, it repeats step b and has reached the set number of plies to the total amount of data obtained is sampled；
D, by the obtained pictorial element of sampling by the sequential build digital slices pyramid of label.
As a preferred embodiment of the invention, as shown in Figures 2 and 3, the various dimensions obtained through the above way
2.5D raster pyramid tile data can quickly show the close progressive of image, greatly under limited network bandwidth conditions
The demand to browsing terminal equipment performance is alleviated greatly.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (8)
1. being based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method, which comprises the following steps:
S1, data acquisition, according to field condition, are made an on-the-spot survey on the spot and are laid artificial target, situation is set on the spot further according to scene
Set that optimal unmanned plane row is high and flight course planning, in scanning process according to circumstances phased point, survey area's topography and landform character and
Modeling accuracy lays ground control point, and the integrality of scan data is checked after the completion of scanning；
Collected data information is imported in three-dimensional reconstruction software and is handled by S2, data prediction；
S3, oblique photograph java standard library and monitoring element information database are established, the database includes true scene data library
With various dimensions 2.5D raster pyramid tile data library；
The data of scene selected by user are showed user by S4, data publication and displaying.
2. according to claim 1 be based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method, spy
Sign is: in the step S1, the endlap of unmanned plane oblique photograph flight must not be lower than 80%, and sidelapping must not be lower than
60%.
3. according to claim 1 be based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method, spy
Sign is: in the step S1, lay ground control point specifically, using GNSS real-time dynamic positioning system RTK measuring instrument,
Cooperate total station, level and locality CORS co-ordinate system information, the three-dimensional coordinate at control point is measured, for each control point
Physical location mark, for all control points survey area distribution core overall distribution figure.
4. according to claim 1 be based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method, spy
Sign is: in the step S2, the processing of three-dimensional reconstruction software includes the beautification of photograph, photo control point selection, photograph control
Thorn point, aerial triangulation and the Model Reconstruction of point, the Model Reconstruction further include that road pavement and floor carry out refine later
And beautification.
5. according to claim 1 be based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method, spy
Sign is, establishes the specific steps in true scene data library are as follows:
After three-dimensional reconstruction data prediction, data are built up with the true 3 d model library of LOD tree pyramid of standard；
Original true three-dimensional data is recombinated, the data that real-time rendering uses are obtained；
Wherein, object generates the simplified model of several different resolutions according to different control errors before drafting in advance,
When drafting, according to the position of object distance pilot, the screen error that user allows calculates the limits of error of actual object.
6. according to claim 5 be based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method, spy
Sign is: when object is drawn, the specific steps are selection control error is less than or equal to the limits of error in multiple simplified models
And with the most similar model of the limits of error, the limits of error are recalculated when pilot change in location and are selected corresponding
Simplified model is drawn.
7. according to claim 1 be based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method, spy
Sign is, establishes the specific steps in various dimensions 2.5D raster pyramid tile data library are as follows:
2.5D grid map comprising the three-dimensional multiple rotation dimensions of outdoor scene is generated to be put in storage with pyramid slice, the various dimensions 2.5D of building
Raster pyramid tile data library；
Outdoor scene threedimensional model is divided according to every 15 ° for a visual angle, and the outdoor scene threedimensional model at each visual angle is generated
The raster data of 2.5D；
The threedimensional model that structure is complicated, data volume is huge is changed into 2.5D grille picture；
Pyramid slice, the various dimensions 2.5D raster pyramid tile data of building are carried out to 2.5D grille picture data.
8. according to claim 7 be based on large scene outdoor scene three-dimensional multi-angle 2.5D image lightweight browsing method, spy
The step of sign is, carries out pyramid slice to 2.5D grille picture data specifically:
A, the pictorial element of slice is obtained, is labeled as the 0th layer, and the tomographic image data are divided into 256 × 256 dimension datas
Block, and record respective coordinates position (X, Y)；
B, using the pictorial element center of preceding layer as basic point, row, column size is reduced according to set proportion, then sampled and marked
Remember the number of plies；
C, it repeats step b and has reached the set number of plies to the total amount of data obtained is sampled；
D, by the obtained pictorial element of sampling by the sequential build digital slices pyramid of label.
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| CN112182307A (en) * | 2020-09-23 | 2021-01-05 | 武汉滴滴网络科技有限公司 | Spatial polygon model multilayer stacking method capable of constructing directed acyclic graph |
| CN112650782A (en) * | 2020-12-30 | 2021-04-13 | 湖南虹康规划勘测咨询有限公司 | Big data geographic information visualization method, system and storage medium |
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| CN119376671A (en) * | 2024-11-27 | 2025-01-28 | 北京七维视觉传媒科技有限公司 | A 2.5D model multi-screen display editing method and system |
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| CN114627262A (en) * | 2022-05-11 | 2022-06-14 | 武汉大势智慧科技有限公司 | Image generation method and system based on oblique grid data |
| CN114627262B (en) * | 2022-05-11 | 2022-08-05 | 武汉大势智慧科技有限公司 | Image generation method and system based on oblique grid data |
| CN119376671A (en) * | 2024-11-27 | 2025-01-28 | 北京七维视觉传媒科技有限公司 | A 2.5D model multi-screen display editing method and system |
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