CN110136259A - A kind of dimensional Modeling Technology based on oblique photograph auxiliary BIM and GIS - Google Patents
A kind of dimensional Modeling Technology based on oblique photograph auxiliary BIM and GIS Download PDFInfo
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Abstract
The invention discloses a kind of dimensional Modeling Technologies based on oblique photograph auxiliary BIM and GIS, it is characterized in that: by oblique photograph aerial survey same position and multiple and different angles there is high-resolution image based on, three-dimensional modeling is carried out by calculating, building concentration and internal information are handled using BIM technology, spatial geographic information data are integrated and analyzed in GIS by data conversion.The present invention relates to dimensional Modeling Technology fields, in particular, being related to a kind of dimensional Modeling Technology based on oblique photograph auxiliary BIM and GIS.The present invention can automate and establish threedimensional model, have the characteristics that high-efficient, precision is high, authenticity is high and inexpensive, fining inter-process is carried out to buildings model in conjunction with BIM, three-dimensional visualization is carried out to model treatment by 3DGIS, modeling have the characteristics that it is quick, true, management and analyze have the characteristics that spatial visualization.Solves the problems such as conventional three-dimensional modeling efficiency low cost is high, model accuracy is inadequate and not can be carried out geography informatization management.
Description
Technical field
The present invention relates to dimensional Modeling Technology fields, in particular, being related to a kind of based on oblique photograph auxiliary BIM and GIS
Dimensional Modeling Technology.
Background technique
With information-based, intelligent city high speed development, quickly establish that range is wide, outdoor scene threedimensional model with high accuracy needs
It asks and is increasingly urgent to.The direction of outdoor scene threedimensional model towards " finer, more accurate, more extensive, richer, objectification " is developed.It passes
System can no longer meet demand based on the manual modeling pattern that large scale topographical map and field operation are manually taken pictures.
BIM is the visualization digital expression of building, can provide building from the abundant information for being designed into dismounting, build to refine
It builds threedimensional model and indoor model obtains and provides convenience.GIS is a kind of to acquire, store, manage, analyze and describe entire or portion
The space information system of point earth surface data related with space and geographical distribution, can preferably realize three-dimensional data can
Depending on changing integrated management, analysis and application.Therefore, the present invention proposes a kind of three-dimensional modeling based on oblique photograph auxiliary BIM and GIS
Technology solves problems of the prior art to play the advantage of scheme.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of three-dimensional modeling skills based on oblique photograph auxiliary BIM and GIS
Art is conducive to spatial geographic information three-dimensional modeling.
The present invention adopts the following technical scheme that realization goal of the invention:
A kind of dimensional Modeling Technology based on oblique photograph auxiliary BIM and GIS, it is characterized in that: specifically includes the following steps:
(1) obtain image: oblique photograph aerial survey same position and multiple and different angles have high-resolution image；
(2) data prediction: carrying out geometry pretreatment to multi-angle of view image, simulates all images including inclination image
Surface projection range carries out same place Auto-matching and free net bundle adjustment on images at different levels, obtains homotopy mapping
As a result；
(3) three-dimensional modeling: model construction is calculated using piecemeal, and program automatically selects best as to model, life in different perspectives
It at the point off density cloud of three dimension scale, puts cloud and is automatically converted to irregular triangle network TIN model, TIN model is carried out smoothly and excellent
Change, obtains optimal viewing angle image texture, it is automatic to assign model texture, export OSGB format threedimensional model achievement；
(4) it constructs BIM data model: building interior information is constructed using BIM, by oblique photograph OSGB format in skyline
True threedimensional model and fbx format BIM model introducting interface, implementation model fusion；
(5) it constructs GIS threedimensional model: being based on oblique photograph outdoor scene three-dimensional modeling data, POI number is loaded in 3D GIS platform
According to, carry out three-dimensional visualization browsing using the display platform of skyline, management measurement, terrain analysis, sight and shadowing analysis with
And vector, grid and complicated terrain analysis.
It is further limited as to the technical program, the step obtains image and specifically includes:
(1.1) camera calibration: carrying out camera calibration using Zhang Zhengyou calibration method, is carried out not using camera to be calibrated to scaling board
With the shooting of position and posture；
(1.2) flight course planning: choosing map datum, carries out reasonable Sortie division, optimization group and scheme；
(1.3) photogrammetric control point surveying: as system is pressed, course line is unified to be laid, and adjacent area net is public as far as possible, puts down high control point using area
Domain periphery is layouted, and internal appropriate plus cloth points put down high control point, and region surrounding is uniformly distributed, which to put down high control point, to mention significantly
High overall precision；
(1.4) aerial survey of unmanned aerial vehicle: setting flight parameter includes height, speed, shooting interval, and course spacing is other to spacing.
It is further limited as to the technical program, the step data prediction specifically includes:
(2.1) data inspection: achievement is taken the photograph to the boat of submission and carries out whole inspection, check item and content are as follows:
The quality of image: clear, color is saturated, is complete；
Image format: Tiff；
Image size: 10336*7788 pixel；
Pos information: the perfect mistake of elements of exterior orientation and image complete match；
Camera parameter: five lens focus are accurate；
(2.2) sky three calculates: by establishing tie point and control point coordinates file, in conjunction with Pos information, realizing multi-angle of view image certainly
The iterative calculation of calibration block adjustment, finally obtains three achievement of sky for meeting required precision；
(2.3) deblocking: according to the geographical feature situation for surveying area, being distinguished into multiple Job partitions for survey, then according to each
The area of Job partition specifically divides operation sub-district, according to each operation sub-district actual range, modeling region is delimited, according to operation
Sub-district central point is origin, carries out piecemeal automatically.
It is further limited as to the technical program, the step three-dimensional modeling specifically includes:
(3.1) point cloud matching: the elements of exterior orientation achievement based on empty three adjustments output forms three-dimensional image pair, to dividing automatically
All three-dimensional images for including in block carry out summarizing conjunction to progress point cloud matching calculating respectively, and by these three-dimensional images pair and point cloud
And；
(3.2) triangulation network generate, texture mapping: obtain a large amount of highdensity point cloud datas after three encryption of sky, according to point
Point off density cloud in the block cut is configured to irregular triangle network, and generates texture-free threedimensional model；
(3.3) inspection and modification of threedimensional model: in Skyline platform, in the case where angular height is 350 meters of scenes to three-dimensional data
It is checked:
(a) building whether there is texture distortion, broken hole, connect；
(b) the whether convex injustice of the water surface, glass, broken hole, reflective；
(c) overall scenario the problems such as whether there is or not levitated objects；
It is further limited as to the technical program, the step building BIM data model specifically includes:
(4.1) BIM model obtains: being obtained by radius function in the Bounding Sphere class in OSG and center function
Modulus molded dimension and centre coordinate.
(4.2) BIM Model Checking: using in PositionAttitudeTransform class setScale function and
The adjustment of setPosition function progress size and position.
(4.3) BIM model exports: oblique photograph measurement OSGB outdoor scene model data being carried out coordinate system setting, to construction
Good BIM model exports FBX mode, and setting coordinate system corresponding with tiltedly photogrammetric OSGB outdoor scene model merges the two
Form 3DML model data.
It is further limited as to the technical program, building has vector number in the step building GIS threedimensional model
Needing to prepare data according to the threedimensional model with POI information includes DOM image data, the DEM high number of passes made in ArcGIS
According to, three-dimensional earth's surface data model, OSGB oblique photograph three-dimensional live model, BIM architecture indoor model and the DLG number for surveying area
According to, 3DML data and attribute data.
Compared with prior art, the advantages and positive effects of the present invention are: oblique photograph technology, which can automate, establishes three
Dimension module has the characteristics that high-efficient, precision is high, authenticity is high and inexpensive, refines in conjunction with BIM to buildings model
Inter-process carries out three-dimensional visualization to model treatment by 3DGIS, and modeling has the characteristics that quick, true, management and analysis
Has the characteristics that spatial visualization.
Detailed description of the invention
Fig. 1 is present system block diagram.
Fig. 2 is the schematic diagram of oblique photograph output model of the present invention.
Fig. 3 is oblique photograph model, BIM model and GIS model integrated schematic diagram of the present invention.
Specific embodiment
With reference to the accompanying drawing, the specific embodiment of the present invention is described in detail, it is to be understood that of the invention
Protection scope be not limited by the specific implementation.
As shown in Figure 1-Figure 3, the present invention provides a kind of dimensional Modeling Technology based on oblique photograph auxiliary BIM and GIS.
Specifically includes the following steps:
(1) obtain image: oblique photograph aerial survey same position and multiple and different angles have high-resolution image.
(1.1) camera calibration: using Zhang Zhengyou calibration method carry out camera calibration, using camera to be calibrated to scaling board into
The shooting of row different location and posture;The scaling board made is clapped from different positions and posture with camera to be calibrated
It takes the photograph, at least obtains 3 images, under normal circumstances in order to which stated accuracy consideration needs to obtain 10-20 images.
(1.2) flight course planning: after camera calibration, it is to be understood that the information such as airspace, area, landform of target area,
The design and planning in course line are carried out later.Determine that aerial survey scale bar, flight are high by the precision and actual demand of target product
The information such as degree.The relevant parameter of ground and eminence need according to selected boat camera parameter with take photo by plane parameter by calculate come
It obtains.
(1.3) photogrammetric control point surveying: as system is pressed, course line is unified to be laid, and adjacent area net is public as far as possible, puts down high control point and adopts
Layouted with area peripheral edge, internal appropriate plus cloth points put down high control point, region surrounding is uniformly distributed put down high control point can be big
It is big to improve overall precision；
(1.4) aerial survey of unmanned aerial vehicle: the regional areas A area is 5.26 square kilometres, carries general trend of events wisdom using quadrotor drone
The black card version of Pisces inclined camera is taken photo by plane, and Pisces inclined camera inclination angle is 420, obtains the Pixel size 4.75 of image, is designed
Flying height 250m, 2 cm of ground resolution, ship's control 85%, sidelapping degree 75%, flying speed 6.5m/s.
(2) data prediction: carrying out geometry pretreatment to multi-view images, eliminate the geometric error of image, vertically lower will regard
Image and inclination image carry out simultaneous adjustment.Based on Photomesh software, in conjunction with the initial elements of exterior orientation that POS system provides,
Simulation include inclination image including all images surface projection range, take by slightly to smart pyramid matching strategy,
Same place Auto-matching and free net bundle adjustment are carried out on images at different levels, obtain homotopy mapping result.It is flat based on sky three
The elements of exterior orientation achievement of difference output, Photemesh can automatically match image, form three-dimensional image pair.
(2.1) data inspection: achievement is taken the photograph to the boat of submission and carries out whole inspection, check item and content are as follows:
The quality of image: clear, color is saturated, is complete；
Image format: Tiff；
Image size: 10336*7788 pixel；
Pos information: the perfect mistake of elements of exterior orientation and image complete match；
Camera parameter: five lens focus are accurate.
(2.2) sky three calculates: by establishing tie point and control point coordinates file, in conjunction with Pos information, realizing multi-angle of view shadow
As self-calibration block adjustment iterative calculation, three achievement of sky for meeting required precision is finally obtained, part Pos file is as follows:
(2.3) deblocking: according to the geographical feature situation for surveying area, being distinguished into multiple Job partitions for survey, then according to each
The area of Job partition specifically divides operation sub-district, according to each operation sub-district actual range, modeling region is delimited, according to operation
Sub-district central point is origin, carries out piecemeal automatically.
(3) three-dimensional modeling: model construction is calculated using piecemeal, and program automatically selects best as to mould in different perspectives
Type generates the point off density cloud of three dimension scale, and point cloud is automatically converted to irregular triangle network TIN model, TIN model is carried out smooth
And optimization, optimal viewing angle image texture is obtained, it is automatic to assign model texture, export OSGB format threedimensional model achievement.
(3.1) point cloud matching: the elements of exterior orientation achievement based on empty three adjustments output forms three-dimensional image pair, to automatically into
All three-dimensional images for including in row piecemeal summarize to progress point cloud matching calculating respectively, and by these three-dimensional images pair and point cloud
Merge.
(3.2) a large amount of highdensity point cloud datas, root triangulation network generation, texture mapping: are obtained after three encryption of sky
It is configured to irregular triangle network according to the point off density cloud in the block of segmentation, and generates texture-free threedimensional model.
(3.3) inspection and modification of threedimensional model: in Skyline platform, in the case where angular height is 350 meters of scenes to three-dimensional
Data are checked:
(a) building whether there is texture distortion, broken hole, connect；
(b) the whether convex injustice of the water surface, glass, broken hole, reflective；
(c) overall scenario the problems such as whether there is or not levitated objects；
(4) it constructs BIM data model: building interior information is constructed using BIM, by oblique photograph OSGB format in skyline
True threedimensional model and fbx format BIM model introducting interface, implementation model fusion.
(4.1) BIM model obtains: passing through the radius function and center letter in the Bounding Sphere class in OSG
Number obtains moulded dimension and centre coordinate.
(4.2) BIM Model Checking: using in PositionAttitudeTransform class setScale function and
The adjustment of setPosition function progress size and position.
(4.3) BIM model exports: oblique photograph measurement OSGB outdoor scene model data being carried out coordinate system setting, to construction
Good BIM model exports FBX mode, and setting coordinate system corresponding with tiltedly photogrammetric OSGB outdoor scene model merges the two
Form 3DML model data.
(5) it constructs GIS threedimensional model: being based on oblique photograph outdoor scene three-dimensional modeling data, load POI in 3D GIS platform
Data carry out three-dimensional visualization browsing, management measurement, terrain analysis, sight and shadowing analysis using the display platform of skyline
And vector, grid and complicated terrain analysis.
Building needs to prepare with the threedimensional model of vector data and POI information in the step building GIS threedimensional model
Data include DOM image data, make in ArcGIS DEM altitude data, three-dimensional earth's surface data model, OSGB inclination are taken the photograph
Shadow three-dimensional live model, BIM architecture indoor model and the DLG data and attribute data of surveying area, the 3DML data of formation can
To be merged in GIS platform with data such as other DLG, attribute data, attribute datas.
Disclosed above is only a specific embodiment of the invention, and still, the present invention is not limited to this, any ability
What the technical staff in domain can think variation should all fall into protection scope of the present invention.
Claims (6)
1. a kind of dimensional Modeling Technology based on oblique photograph auxiliary BIM and GIS, it is characterized in that: specifically includes the following steps:
Obtain image: oblique photograph aerial survey same position and multiple and different angles have high-resolution image；
Data prediction: carrying out geometry pretreatment to multi-angle of view image, simulates the ground of all images including inclination image
Table drop shadow spread carries out same place Auto-matching and free net bundle adjustment on images at different levels, obtains homotopy mapping knot
Fruit；
Three-dimensional modeling: model construction is calculated using piecemeal, and program automatically selects best as generating three to model in different perspectives
The point off density cloud of scale is tieed up, point cloud is automatically converted to irregular triangle network TIN model, and TIN model is carried out smooth and optimization, is obtained
Optimal viewing angle image texture is taken, it is automatic to assign model texture, export OSGB format threedimensional model achievement；
It constructs BIM data model: building interior information is constructed using BIM, by oblique photograph OSGB format in skyline
The introducting interface of the BIM model of true threedimensional model and fbx format, implementation model fusion；
It constructs GIS threedimensional model: being based on oblique photograph outdoor scene three-dimensional modeling data, POI data is loaded in 3D GIS platform, benefit
Three-dimensional visualization browsing, management measurement, terrain analysis, sight and shadowing analysis and arrow are carried out with the display platform of skyline
Amount, grid and complicated terrain analysis.
2. the dimensional Modeling Technology according to claim 1 based on oblique photograph auxiliary BIM and GIS, it is characterized in that: described
Step obtains image and specifically includes:
Camera calibration；
Flight course planning: map datum is chosen, reasonable Sortie division is carried out, takes longer sides conduct in conjunction with mission area shape
Air strips direction reduces number of turns to the full extent, guarantees quality of taking photo by plane；
Photogrammetric control point surveying: as system is pressed, course line is unified to be laid, and adjacent area net is public as far as possible, puts down high control point using area peripheral edge
It layouts, internal appropriate plus cloth points put down high control point, and region surrounding is uniformly distributed, which to put down high control point, can greatly improve entirety
Precision；
Aerial survey of unmanned aerial vehicle: setting flight parameter includes height, speed, shooting interval, and course spacing is other to spacing.
3. the dimensional Modeling Technology according to claim 1 based on oblique photograph auxiliary BIM and GIS, it is characterized in that: described
Step data prediction specifically includes:
(2.1) data inspection: achievement is taken the photograph to the boat of submission and carries out whole inspection, check item and content are as follows:
The quality of image: clear, color is saturated, is complete；
Image format: Tiff；
Image size: 10336*7788 pixel；
Pos information: the perfect mistake of elements of exterior orientation and image complete match；
Camera parameter: five lens focus are accurate；
(2.2) sky three calculates: by establishing tie point and control point coordinates file, in conjunction with Pos information, realizing multi-angle of view image certainly
The iterative calculation of calibration block adjustment, finally obtains the data for meeting required precision；
(2.3) deblocking: according to the geographical feature situation for surveying area, being distinguished into multiple Job partitions for survey, then according to each
The area of Job partition specifically divides operation sub-district, according to each operation sub-district actual range, modeling region is delimited, according to operation
Sub-district central point is origin, carries out piecemeal automatically.
4. the measurement method of the dimensional Modeling Technology according to claim 1 based on oblique photograph auxiliary BIM and GIS,
Be characterized in: the step three-dimensional modeling specifically includes:
(3.1) point cloud matching: the elements of exterior orientation achievement based on empty three adjustments output forms three-dimensional image pair, to dividing automatically
All three-dimensional images for including in block carry out summarizing conjunction to progress point cloud matching calculating respectively, and by these three-dimensional images pair and point cloud
And；
(3.2) triangulation network generate, texture mapping: obtain a large amount of highdensity point cloud datas after three encryption of sky, according to point
Point off density cloud in the block cut is configured to irregular triangle network, and generates texture-free threedimensional model；
(3.3) inspection and modification of threedimensional model: in Skyline platform, in the case where angular height is 350 meters of scenes to three-dimensional data
It is checked:
(a) building whether there is texture distortion, broken hole, connect；
(b) the whether convex injustice of the water surface, glass, broken hole, reflective；
(c) overall scenario the problems such as whether there is or not levitated objects.
5. special according to the measurement method of the dimensional Modeling Technology described in claim 1 based on oblique photograph auxiliary BIM and GIS
Sign is: the step building BIM data model specifically includes:
(4.1) BIM model obtains: being obtained by radius function in the Bounding Sphere class in OSG and center function
Modulus molded dimension and centre coordinate;
(4.2) BIM Model Checking: using in PositionAttitudeTransform class setScale function and
The adjustment of setPosition function progress size and position;
(4.3) BIM model exports: oblique photograph measurement OSGB outdoor scene model data being carried out coordinate system setting, to what is constructed
BIM model exports FBX mode, setting coordinate system corresponding with tiltedly photogrammetric OSGB outdoor scene model, in CityBuilder
The two is merged to form 3DML model data.
6. special according to the measurement method of the dimensional Modeling Technology described in claim 1 based on oblique photograph auxiliary BIM and GIS
Sign is: building needs to prepare data with the threedimensional model of vector data and POI information in the step building GIS threedimensional model
Including DOM image data, the DEM altitude data made in ArcGIS, three-dimensional earth's surface data model, OSGB oblique photograph three
Tie up outdoor scene model, BIM architecture indoor model and the DLG data and attribute data of surveying area, the 3DML data of formation can be with
The data such as other DLG, attribute data, attribute data are merged in GIS platform.
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Application publication date: 20190816 |