CN107609900A - A kind of room streetscape pricing method based on oblique photograph and BIM - Google Patents
A kind of room streetscape pricing method based on oblique photograph and BIM Download PDFInfo
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- CN107609900A CN107609900A CN201710740755.9A CN201710740755A CN107609900A CN 107609900 A CN107609900 A CN 107609900A CN 201710740755 A CN201710740755 A CN 201710740755A CN 107609900 A CN107609900 A CN 107609900A
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Abstract
The present invention provides a kind of room streetscape pricing method based on oblique photograph and BIM, belongs to construction engineering technical field.This method establishes target structures refined model first with BIM softwares, and the surrounding enviroment model of target structures is established using oblique photograph e measurement technology；Then, BIM models and oblique photograph measurement model are subjected to model space matching, form the virtual reality scenario that can be experienced；Finally, the room streetscape willingness to pay evaluation method based on virtual experience is proposed.By taking 6 layers of house as an example, illustrate room streetscape virtual experience and price-setting process, it was demonstrated that the availability of the present invention.The present invention provides new technological means for price of the room streetscape in real estate project in the presell stage.
Description
Technical field
The present invention relates to construction engineering technical field, particularly relates to a kind of room based on oblique photograph and BIM
Between streetscape pricing method.
Background technology
In real estate project, the fine or not degree of room streetscape affects the price in room to a certain extent.In presell
Stage, house are not built up, and room streetscape can not be experienced, and the house price to different streetscapes brings difficulty.
For real estate developer in traditional building presell stage, the mode that designer is commonly used is sand table, building effect
Fruit figure etc., but these technologies, all there is certain limitation, sand table model can only obtain one and get a bird's eye view image, architectural effect
Figure can only provide the visual experience of static state.
By Virtual Reality technology, if user's body can be allowed to see for oneself room streetscape in advance, to room presell rank
Price before section provides good foundation.Virtual reality technology can make user visually obtain concept of reality to greatest extent
Sense.User can be carried out body and faced with the mode of dynamic interaction in a virtual three-dimensional environment to the building in future or city
Its border, comprehensive close examination, from user can be subject to from any angle, any distance to scene, can freely it control clear
The route look at.This is the height that traditional Architectural exhibition mode can not reach.But in terms of virtual streetscape experience, currently grind
Study carefully and stress building interior, building that outdoor model is coarse, the sense of reality is insufficient, (Jia Qiang virtual reality technologies are in development of real estate
Using [J] value engineerings, 2016, (16):199-200), it have impact on the effect of streetscape experience.
BIM BIM has detailed building element information and fine threedimensional model, can be used for establishing
Build the sense of reality virtual scene of interior.Oblique photograph e measurement technology is a new technology in terms of mapping in recent years, by flying
5 boat cameras are carried on row platform, ground is shot to establish using the numerical map video camera of five different angles
The outdoor threedimensional model of high fidelity.
BIM and oblique photograph measurement model are combined to form the unified sense of reality three-dimensional scenic of indoor and outdoor by the present invention, and are opened
Scenario experiences technology and streetscape pricing method are sent out, advanced Scenario experiences means are provided for room streetscape price.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of room streetscape based on oblique photograph and BIM
Pricing method, advanced technological means is provided for room streetscape price.
This method comprises the following steps：
(1) sense of reality three-dimensional environment modeling based on oblique photograph measurement：
First, oblique photograph measurement is carried out to target structures region using unmanned plane, then, oblique photograph picture carried out
Post processing, establishes sense of reality three dimensional environmental model；
(2) based on BIM and tiltedly photogrammetric VR scene creations：
First, the three dimensional environmental model that post processing obtains in step (1) is imported into Virtual Reality platform；Then,
The BIM models of target structures are established, BIM models are imported into VR platforms, carry out target structures BIM and three dimensional environmental model
Spatial match；Finally, illumination is added, completes VR scene creations；
(3) the willingness to pay evaluation of room streetscape：
After VR scene creations are completed, by selecting buyer, virtual experience, virtual auction, setting price to complete room
The willingness to pay evaluation of streetscape.
Wherein, in step (1), first, oblique photograph measurement is carried out using unmanned plane.Between the continuous image of oblique photograph
Lap more than 60%, object with a part different shooting points between separation be less than 15 °, and photo record location and
Alignment system (POS) data.
The photo that oblique photograph measures in step (1) needs to post-process, to establish the three dimensional environmental model of the sense of reality, specifically
Process is as follows：
First, POS data is analyzed.After photo being imported using ContextCapture platforms, meeting in ContextCapture
The POS information of photo is shown, if photo lacks POS data, adds POS parameter manually；
Then, aerial triangulation is carried out, after obtaining photo triangulation, generates digital surface model DSM；
Finally, photo and numerical value surface model are subjected to texture mapping, generate sense of reality environmental model, save as OSGB lattice
Formula.
Step (2) is before BIM models are loaded into VR platforms, it is necessary to which the texture of Optimized model, detailed process are as follows：It is first
First, BIM model files are imported into 3ds Max and carries out texture mapping；Then, using entitled osgExp 3ds Max plug-in units by 3ds
Model conversion in Max is OSGB files；Finally, OSGB files can pass through model->addChild(osgDB::
ReadNodefile (" ../model.osgb ")) sentence be loaded into VR platforms.
BIM and three dimensional environmental model spatial match process are as follows in step (2)：First, ordered and obtained according to radius ()
Outdoor environment model and BIM model diameters, and calculate the ratio of BIM model versus environmental models, it is right by setScale ()
BIM models zoom in and out；Then, the coordinate of BIM model areas in environmental model is obtained；Finally, setPosition () is passed through
Designated area BIM models being placed in environmental model.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
The evaluation method based on BIIM and oblique photograph e measurement technology in VR scenes with realizing to real building
The reduction of environment, greatly reduces manual intervention in terms of modeling, realizes quick, easily modeling process, and using virtual
Competing calibration method truly grasps authentic assessment and willingness to pay of the house purchaser for room streetscape, is room landscape experience and room
Between the important evidence provided of fixing a price provide new technological means for price of the room streetscape in real estate project in the presell stage.
Brief description of the drawings
Fig. 1 is the method general flow chart of the present invention；
Fig. 2 is the three-dimensional environment modeling procedure figure based on oblique photograph measurement in the present invention；
Fig. 3 is that room streetscape is virtually bidded flow chart in this method；
Fig. 4 is the residential building BIM illustratons of model in embodiment；
Fig. 5 is residential building plan；
Fig. 6 is the three dimensional environmental model created by this method；
Oblique photograph model and the scene graph after BIM Model Fusions in Fig. 7 this method；
Fig. 8 is the representative streetscape figure in each room of 6 layers of residential building, and (a) is A rooms, and (b) is B rooms, and (c) is C rooms
Between, (d) is D rooms；
Fig. 9 is 4 room streetscape price graph of residential building 6 layer.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of room streetscape pricing method based on oblique photograph and BIM.
This method broad flow diagram mainly includes as shown in Figure 1：(1) sense of reality three-dimensional environment based on oblique photograph measurement
Modeling；(2) based on BIM and tiltedly photogrammetric VR scene creations；(3) the willingness to pay evaluation of room streetscape.Idiographic flow is such as
Under：
(1) sense of reality three-dimensional environment modeling based on oblique photograph measurement：
Oblique photograph modeling software establishes three dimensional environmental model using widely used ContextCapture on the market,
The general modeling process of the software is as shown in Figure 2.The process is mainly made up of two steps：1. carried out using unmanned plane (UAV)
Oblique photograph；2. oblique photograph measures the post processing of picture.
1. carry out oblique photograph using unmanned plane.
It is exactly image photo that oblique photograph, which models most important raw material, generate threedimensional model precision and resolution ratio with adopting
The image precision of collection is directly related.In general, the lap between continuous image should be more than 60%.A same part for object
Different shooting points between separation should be less than 15 °.In order to obtain preferable image photo, it is necessary to use correct focal length and bat
Photographic range gathers image.Each pictures will store pos data, save as jpeg format.
2. oblique photograph measures the post processing of picture.
Step 1：Analyze POS data.After importing photo, the POS information of photo can be shown in ContextCapture.Such as
Fruit photo lacks POS data, then can add POS parameter (such as longitude and latitude coordinate) manually, this point can aid in
Aerial triangulation.
Step 2：Aerial triangulation.Aerial triangulation is that elevation and the plane position of pass point are tried to achieve by calculating means
The measuring method put.The process finally provides the externally-oriented parameter of the photo and three-dimensional coordinate that obtain measurement object point.In the air
The purpose of triangulation is the externally-oriented parameter by improving every photo, when generating digital surface model (DSM) to improve
Precision needed for realizing.
Step 3：Generate topographical surface model DSM.
Step 4：Texture mapping.After creating new DSM, the texture mapping that is created from the photo of collection to DSM.
Step 5：The threedimensional model of the sense of reality is generated, saves as OSGB forms.
In specific implementation process, 6 layers of residential building are have selected as case.The BIM models of the building are created by Revit
Build and show in Fig. 4.There are four rooms in each floor of the building, these rooms are respectively designated as A, B, such as C and D rooms, Fig. 5
It is shown.The gross area in every room is 81 square metres, and the building is located at a small town in Jinhua, Zhejiang city, every square metre of price
About 30,000 yuan, the initial prices in every room are about 2,430,000 yuan.In each room, there is the window of three different directions, so
What comes into a driver's per four rooms of floor is all different.The oblique photograph model of the present invention is by using unmanned plane to Jinhua, Zhejiang city
Small town carries out oblique photograph measurement, have collected the high definition photo of the small town.730 jpeg format shooting high definition photos of collection, and
Record corresponding positioning and alignment system (POS) data of photograph.By modeling method of the present invention, built by ContextCapture
The samll cities and towns' three dimensional environmental model (including building, trees, river and road) for having found a high realism is as shown in Figure 6.
(2) based on BIM and tiltedly photogrammetric VR scene creations：
In the present invention, it have selected the widely used three dimentional graph display OpenScenenGraph (OSG) that increases income and be used as VR
Platform.The three dimensional environmental model generated by oblique photograph measurement data is preserved with OSGB form, and OSGB is OSG acquiescence lattice
Formula, therefore any need not change can under OSG environment and be loaded directly into three dimensional environmental model.
The residential building BIM models of the present invention are created using Autodesk Revit2016, and model can be with Revit
Many detailed components, such as wall, pillar and stair are shown, but model texture is poor in Revit, is loaded into BIM models
, it is necessary to the texture of Optimized model before OSG.First, the BIM model files of Revit generations are imported into 3ds Max progress textures to reflect
Penetrate.Then, the use of entitled osgExp 3ds Max plug-in units is OSGB files by the model conversion in 3ds Max.Finally, OSGB
File can pass through model->addChild(osgDB::ReadNodefile (" ../model.osgb ")) sentence be loaded into
In OSG.By above-mentioned steps, the BIM models with high quality texture can be shown in OSG.
Spatial match is the key issue that BIM and three dimensional environmental model integrate.In order to solve this problem, BIM models will
Scale adjustment is carried out according to the size of three dimensional environmental model, and is moved to ad-hoc location.In BoundingSphere classes in OSG
Radius () function can measure the radiuses of all models of OSG.PositionAttitudeTransform this class can be with
The position of model and ratio are adjusted by using setPosition () and setScale () function.Order can more than
To realize the matching of BIM models and environmental model.First, ordered according to radius () and obtain outdoor environment model and BIM models
Diameter, and calculate the ratio of BIM model versus environmental models, BIM models are zoomed in and out by setScale ()；Then, obtain
Obtain the coordinate of BIM model areas in environmental model；Finally, BIM models are placed on by ring by setPosition () can
Designated area in the model of border., can be by OSG if finding that BIM matches inaccuracy with target area by scene walkthrough
SetPosition () and setAttitude () function trim locations and angle.
In addition, illumination has certain influence to the vivid effect of VR scenes, therefore illumination should be added in collective model.
OSG Class Light classes can be used for for model creation illumination.The relevant parameter (for example, environment, position and direction) of illumination
It can be configured in Class Light, appropriate illumination is created for whole model of place.
BIM models (Fig. 4) are integrated into OSG three dimensional environmental model (Fig. 6) by method set forth above, it is integrated
VR scenes are as shown in Figure 7.The rover developed by using the present invention, room streetscape can be carried out in integrated VR scenes
Virtual experience.Fig. 8 (a), (b), (c), (d) respectively illustrate the typical room streetscape in four rooms of the building layer 6.
(3) the willingness to pay evaluation of room streetscape：
The present invention obtains the willingness to pay of room streetscape using the method virtually bidded, as shown in Figure 3.Virtually bid
Whole process can be divided into four steps：Selection buyer, virtual experience, virtual auction, set price.When all Buyers's Experiences are complete
After the what comes into a driver's in room, provided and oneself be ready for room streetscape pay this extra how many price according to the difference of room streetscape, and calculated
The highest bid in each room.If some buyers are desired higher than the bid of current highest price, transaction will continue.When
When all buyers break up one's business, the ceiling price of room rate will be considered as the final price of room rate at present.
In specific implementation, the virtual experience of room landscape is participated in by inviting 50 buyers, and provide 6 layers of all rooms
Outdoor scene what comes into a driver's is fixed a price.By the above-mentioned virtual price competing method based on virtual experience, the final price of four room views has been drawn
As shown in Figure 9.Room D what comes into a driver's price highest, and room A and B outward appearance what comes into a driver's are minimum.From Fig. 8 it can be found that in D rooms
It can be seen that whole cities and towns, but the visual field outside A and D rooms is blocked.Therefore, draw room rate most according to virtual competitive bidding
Final value lattice are rational.Developer is according to final bid price according to the price for determining room streetscape.The present invention is real estate project
Price of the middle room streetscape in the presell stage provides new technological means.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (5)
- A kind of 1. room streetscape pricing method based on oblique photograph and BIM, it is characterised in that：Including following step Suddenly：(1) sense of reality three-dimensional environment modeling based on oblique photograph measurement：First, oblique photograph measurement is carried out to target structures region using unmanned plane, then, located after being carried out to oblique photograph picture Reason, establishes sense of reality three dimensional environmental model；(2) based on BIM and tiltedly photogrammetric VR scene creations：First, the three dimensional environmental model that post processing obtains in step (1) is imported into Virtual Reality platform；Then, establish The BIM models of target structures, BIM models are imported into VR platforms, carry out the space of target structures BIM and three dimensional environmental model Matching；Finally, illumination is added, completes VR scene creations；(3) the willingness to pay evaluation of room streetscape：After VR scene creations are completed, by selecting buyer, virtual experience, virtual auction, setting price to complete room streetscape Willingness to pay evaluation.
- 2. the room streetscape pricing method according to claim 1 based on oblique photograph and BIM, its feature It is：Lap in the step (1) between the continuous image of oblique photograph is more than 60%, difference of the object with a part Separation between shooting point is less than 15 °, and photo record location and alignment system POS data.
- 3. the room streetscape pricing method according to claim 1 based on oblique photograph and BIM, its feature It is：The detailed process that oblique photograph picture post-processes in the step (1) is as follows：First, POS data is analyzed, after importing photo using ContextCapture platforms, can be shown in ContextCapture The POS information of photo, if photo lacks POS data, POS parameter is added manually；Then, aerial triangulation is carried out, after obtaining photo triangulation, generates digital surface model DSM；Finally, photo and digital surface model are subjected to texture mapping, generate sense of reality environmental model, save as OSGB forms.
- 4. the room streetscape pricing method according to claim 1 based on oblique photograph and BIM, its feature It is：The step (2) is before BIM models are loaded into VR platforms, it is necessary to which the texture of Optimized model, detailed process are as follows：It is first First, BIM model files are imported into 3ds Max and carries out texture mapping；Then, using entitled osgExp 3ds Max plug-in units by 3ds Model conversion in Max is OSGB files；Finally, OSGB files can pass through model->addChild(osgDB:: ReadNodefile (" ../model.osgb ")) sentence be loaded into VR platforms.
- 5. the room streetscape pricing method according to claim 1 based on oblique photograph and BIM, its feature It is：Target structures BIM and three dimensional environmental model spatial match process are as follows in the step (2)：First, according to radius () order obtains outdoor environment model and BIM model diameters, and calculates the ratio of BIM model versus environmental models, passes through SetScale () zooms in and out to BIM models；Then, the coordinate of BIM model areas in environmental model is obtained；Finally, pass through BIM models are placed on the designated area in environmental model by setPosition ().
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Application publication date: 20180119 |