CN102054290A - Construction method of panoramic/realistic hybrid reality platform - Google Patents
Construction method of panoramic/realistic hybrid reality platform Download PDFInfo
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Abstract
The invention discloses a construction method of a panoramic/realistic hybrid reality platform, which comprises the following specific steps: acquiring panoramic picture data, geographic information data and other original data required for constructing a hybrid reality platform, and storing in a data storage unit of a data management background; then, creating a hybrid reality panoramic/realistic display curtain, creating a virtual ground and adding 3D entities to construct a hybrid reality space based on panoramic pictures; and finally, synchronizing the hybrid reality space with the geographic information of the real world. By organically combining the real scene with the 3D entities in the virtual space, the invention enables users to have strong space reality feeling and immersion feeling in the process of roaming in the hybrid reality space.
Description
Technical field
The present invention relates to virtual reality technology, a kind of specifically panorama outdoor scene mixes reality (HybridReality) platform construction method.
Background technology
In recent years, virtual reality technology is the focus of the research of on areas of information technology both at home and abroad.Traditional virtual reality technology all is by reappear the three-dimensional sight of real world based on the environmental modeling technology of 3D.Such as the method for virtual Philadelphia (Virtual Philadelphia) employing 3D modeling, each building in whole Philadelphia is carried out modeling in the Virtual Space, the user can carry out virtual roaming in the street in Philadelphia.Virtual community and for example, as: second life (Second Life) etc. equally also are to carry out modeling in the space by the 3D instrument, and different with the former is that the modeling to environment in community can be finished by user oneself.The advantage that adopts the 3D modeling technique to carry out virtual environment building is that space multistory sense and stereovision are strong.But adopt the virtual environment of three-dimensional scenic modeling and true environment all to have than big difference usually, fidelity is not high, and the extensive work of modeling need be by manually finishing, and efficient is lower.Characteristics such as and the virtual reality technology based on image rendering that grew up in recent years is complete with its environmental information reproduction, and the scene structure is quick develop into a kind of environmental modeling technology of highly effective gradually.
In utilizing, adopt the panorama real scene image of real scene to make up whole Virtual Space usually based on image rendering technique construction virtual reality scenario process.Numerous in the world famous universities such as Harvard University (Harvard University), the institutions of higher learning such as (University of Oxford) of Regius professor is adopting this technology to show campus environment to the world on the website separately.With the Harvard University is example, gathers the panorama real scene image at the key scenic spot of its inside, campus, it is mapped in the diameter of Spherical Volume, and calibrates these positions on the map of campus.When the user uses these calibration position of click, be implemented on the fixed view with space, any view campus scene.Usually, all disperse in the camera site of these panorama real scene images.
Google company adopts this virtual reality technology based on image rendering to release streetscape (Street View) function on Google map.Its adopt vehicle-mounted panoramic camera in the street on the way scenery take continuously, and the shooting path according to two-dimensional map makes up a series of spherical panoramas space in whole three dimensions, the panorama real scene image in corresponding geographic position is mapped to its spherical panorama space, the user can finish the roaming to whole streetscape by jumping in different spherical panorama spaces, and also can realize 360 comprehensive observations in each space.
The above-mentioned existing virtual reality system based on the image rendering technology has all adopted the method at the interior texture panorama real scene image of diameter of Spherical Volume (or other shapes cube for example, cylindrical space) to make up the panorama space.Though adopt the fidelity and the feeling of immersion of drawing that large increase has been arranged based on its virtual scene of image rendering technology, to compare with adopting 3D modeling technique structure virtual scene, its stereoscopic sensation and stereovision are inadequate again.Therefore only adopt based on the Virtual Space of image rendering technique construction and scene content rich can not be carried out comparatively complete performance.
In order to solve single application 3D modeling technique or to give the establishment limitation that virtual reality space is brought based on the image rendering technology, the method that makes up virtual reality space by hybrid modeling is suggested.Its main thought is that the real scene image of taking is set up its three-dimensional model by the method for three-dimensional reconstruction, and image texture is mapped to sets up on the good three-dimensional model, this hybrid modeling method lays particular emphasis on technical mixing, is to carry out mixing with the image rendering technology on the basis of 3D modeling.And the three-dimensional model that U.S. Google company and Microsoft company also adopt similar techniques that texture is got well in foundation is showed in roaming website, city separately.But can there be a large amount of problems such as pinup picture dislocation in the reality environment that adopts this technique construction, and therefore constructed reality environment is not really true to life.
Therefore people need a kind of environmental simulation Du Genggao, and scene has stronger stereoscopic sensation and stereovision, abundant in content VR-Platform.At present, the method that can realize possessing above-mentioned characteristic VR-Platform report as yet.
Summary of the invention
The structure virtual scene is independent in the prior art adopts based on the image rendering technology with employing is lower based on the scene structure fidelity that graphics plotting brought separately in order to overcome, or scene stereoscopic sensation and stereovision are relatively poor, the problem that content is abundant inadequately, the technical problem to be solved in the present invention provides a kind of environmental simulation Du Genggao, scene has stronger stereoscopic sensation and stereovision, and abundant in content panorama outdoor scene mixes real platform construction method.
To achieve these goals, the technical solution used in the present invention is as follows:
1) in 3d space, creates curtain outside the demonstration of panorama outdoor scene
Adopt 3D graphic package interface to create the three-dimensional environment that mixes realistic space, and in mixing the three-dimensional environment of realistic space, draw curtain outside the scene demonstration; The panorama real scene image data that collect are sent to 3D display platform the Application Program Interface from the data management backstage, texture shows outer scene plot face to scene, obtains the panorama outdoor scene and shows outer act;
2) create virtual ground and add the 3D entity
Show outer act the virtual ground that foundation is used to put the 3D entity in the realistic space that mixes what built based on the panorama outdoor scene, promptly showing that based on the panorama outdoor scene outer act the 3D entity that shows in the realistic space that mixes adds on the virtual ground, roams on the virtual ground that the user creates in mixing realistic space current;
3) it is synchronous to mix the geographic information data of realistic space and real world
To show that the geographic information data that mixes the pairing real world of realistic space current frame image of outer curtain passes to the preprepared geographical information platform in real time by the routine interface between 3D display platform and the geographical information platform based on the panorama outdoor scene, on geographical information platform, demarcate and upgrade the position of user of current roaming.
Described mix reality be meant by with the panorama real scene image as scene background, and 3D modeling entity organically combined in the scene that the panorama real scene image makes up the computer virtual scene that merges on scene content.
The preparation of described panorama real scene image data and geographic information data comprises:
Utilize the data acquisition platform collection to make up and mix the needed raw data of real platform, the panorama real scene image data and the pairing geographic information data of this frame of one frame are stored respectively in the data acquisition storer according to continuous mode, and dumped in the data storage cell on data management backstage;
The geographic information data opening relationships table that deposit path that will each frame image data that data storage cell is stored in the data management backstage is corresponding with this frame is stored in relation table in the database on data management backstage.
Described establishment virtual ground may further comprise the steps:
Show in the panorama outdoor scene that built and mixing of outer act place to set up one in the realistic space and can not meet as virtual ground;
Determine the position of above-mentioned virtual ground in mixing realistic space, consistent to guarantee the image that outside the panorama outdoor scene shows, shows on the curtain with the perspective relation that mixes realistic space.
Described interpolation 3D entity is:
To import at the 3D solid model that mixes the outside establishment of realistic space and mix in the realistic space, be on the virtual ground of user in mixing realistic space the roaming before, the 3D solid model file that utilizes the 3D modeling tool to set up is carried out data storage, obtain the raw data of 3D entity, utilize routine interface to read in the 3D display platform described raw data again.
Perhaps described interpolation 3D entity is:
Mixing the inner 3D of interpolation of realistic space entity, promptly will prepare mixing the 3D attributes of entities information of drawing in the realistic space in the 3D on data management backstage entity management unit earlier stores, when the user is mixing the geographic position of the 3D entity that roams into above-mentioned preparation drafting in the realistic space, the data management backstage will be transferred to the 3D display platform in the 3D of current geographic position entity attribute information by routine interface in the 3D entity management unit, utilizes 3D graphic package interface drafting 3 D entity in the 3D display platform.
The described roaming on virtual ground may further comprise the steps:
Distance on the virtual ground and the actual range relation in the real world are demarcated, promptly in mixing realistic space from user's viewpoint to virtual ground distance and with actual photographed video camera center and ground actual range measure, the ratio of these two distances is as mixing the realistic space distance to actual range conversion scale;
Can't observe user's self 3D people entities the user but can observe in other users' the displayed scene of 3D people entities and carry out the roaming of first visual angle; Perhaps the user mixing in the realistic space can complete observation to the entity of representing this user self, also can observe simultaneously in the displayed scene of other user subjects and carry out the roaming of the 3rd visual angle.
The roaming of described first visual angle is the continous way roaming, is specially:
Begin to carry out and the initialization first visual angle continous way roaming program;
Read the first frame panorama real scene image data and the pairing geographic information data of these panorama real scene image data in preliminary election roaming path from the data management backstage;
With panorama real scene image texture curtain outside scene shows, gps data is sent to geographical information platform by routine interface and is used to upgrade the geographic position, and replacement user viewpoint position in mixing realistic space;
Judge that the current panorama outdoor scene that is presented at shows whether the panorama real scene image on the outer curtain arrives end frame;
If the arrival end frame, then the first visual angle continous way roaming program is carried out and is finished;
If do not arrive end frame, then the 3D display platform begins the geographic information data to data management background request next frame panorama real scene image data and this frame panorama real scene image data correspondence, with panorama real scene image data texture curtain outside scene shows of newly asking, and calculate the geographic information data of present frame and the rotation angle of distance between the previous frame geographic information data and panorama real scene image collecting device;
Utilize reality distance of having demarcated and the corresponding relation that mixes the realistic space distance, with viewpoint together with the panorama outdoor scene show outer curtain move to the present frame geographic information data pairing mix the realistic space position, geographic information data is sent to geographical information platform by routine interface and upgrades the geographic position simultaneously;
Go to " with panorama real scene image texture curtain outside scene shows, geographic information data is sent to geographical information platform by routine interface and is used to upgrade the geographic position, and replacement user viewpoint position in mixing realistic space " step.
The roaming of described first visual angle is the great-jump-forward roaming, is specially:
Begin to carry out and the initialization first visual angle great-jump-forward roaming program;
Be selected in an inner virtual ground or the 3D architectural entity of the outer curtain of panorama outdoor scene demonstration by point and roam, obtain clicking the coordinate of position in virtual ground;
The initial position of viewpoint center on virtual ground is as the initial point that mixes realistic space, obtain and the rotation angle of viewpoint the center actual range in real world and panorama real scene image collecting device between the initial position on the virtual ground, calculate the actual longitude and latitude of this initial position;
The user judges whether to jump to selected position; Redirect if desired, next step then continues;
The physical location that calculating is tried to achieve sends back the data management backstage, in database, search deposit path with the most contiguous panorama real scene image information in this position, and in data storage cell, panorama real scene image data are extracted, transmit back the 3D display platform, on new position, repaint curtain outside the demonstration of panorama outdoor scene, on geographical information platform, upgrade the current geographic position of user simultaneously;
The user judges whether to quit a program, as quits a program, then the EOP (end of program) of the first visual angle great-jump-forward roaming;
As not withdrawing from the first visual angle great-jump-forward roaming program, then go to " initial position of viewpoint center on virtual ground is as mixing the initial point of realistic space; obtain and the rotation angle of viewpoint the center actual range in real world and panorama real scene image collecting device between the initial position on the virtual ground, calculates the actual longitude and latitude of this initial position " step;
If do not need to jump to selected position then go to " initial position of viewpoint center on virtual ground is as mixing the initial point of realistic space; obtain and the rotation angle of viewpoint the center actual range in real world and panorama real scene image collecting device between the initial position on the virtual ground, calculates the actual longitude and latitude of this initial position " step.
The roaming of described the 3rd visual angle may further comprise the steps:
Begin to carry out the 3rd visual angle roaming program;
Roaming program in initialization the 3rd visual angle limits the roaming range of user subject in virtual ground position, present frame scene place;
Handle the pairing 3D people entities of user self and on the residing virtual ground of present frame, begin roaming;
When the user handles the 3D people entities away from initial position, calculate current position of 3D people entities and initial position in mixing realistic space distance and with respect to the rotation angle of the panorama real scene image collecting device of initial position;
The user judges whether its viewpoint needs to jump to 3D people entities present position;
When user's viewpoint need jump to 3D people entities present position, next step continued;
The physical location that calculates is sent back the data management backstage, in database, search deposit path with the most contiguous panorama real scene image information in this position, in data storage cell, panorama real scene image data are extracted, and the result is transmitted back to the 3D display platform, on new position, draw curtain outside the spherical scene, on geographical information platform, upgrade the current geographic position of user simultaneously;
The user judges whether to quit a program, as quits a program, then the 3rd visual angle roaming EOP (end of program);
As not withdrawing from the 3rd visual angle roaming program, then go to " when the user handles the 3D people entities away from initial position, calculate current position of 3D people entities and initial position in mixing realistic space distance and with respect to the rotation angle of the panorama real scene image collecting device of initial position " step;
If judging its viewpoint, the user do not need to jump to 3D people entities present position, then go to " when the user handles the 3D people entities away from initial position, calculate current position of 3D people entities and initial position in mixing realistic space distance and with respect to the rotation angle of the panorama real scene image collecting device of initial position " step.
Described panorama outdoor scene shows that outer curtain adopts spherical, cube shaped, the cylinder bodily form or other enclosure space solid.。
Compared with prior art, beneficial effect of the present invention is as follows:
The present invention will organically combine based on the virtual reality system of image rendering technology and virtual reality system based on traditional 3D modeling technique, inherit the panorama real scene image and in making up virtual scene, had the advantage of high emulation, simultaneously also inherit the 3D modeling and had very strong relief advantage, it is poor effectively to have solved in the existing virtual reality system scene sense of reality, stereoscopic sensation is strong inadequately, problems such as content is abundant inadequately show as especially:
1. fidelity height, scene make up true, abundant in content.The present invention not only adopts based on the image rendering technology panorama real scene image is mapped in the outer curtain of scene demonstration, and utilizes the 3D modeling method, by mixing the inner 3D of interpolation of realistic space entity, has set up abundant in content three-dimensional outdoor scene efficiently and has mixed realistic space.The constructed realistic space that mixes has high emulation, stronger stereovision, stereoscopic sensation and feeling of immersion; And the user can appear in the Virtual Space with a kind of entity identities, this panorama real scene image with reality scene is a background, be combined in the method that mixes embedding 3D entity in the realistic space and can effectively strengthen the feeling of immersion in space, stereovision, stereoscopic sensation and fidelity, this is the present not available characteristics of all existing virtual reality systems.
2. the present invention will combine with the two-dimensional map (geographical information platform) of real world based on the realistic space that mixes of panorama outdoor scene, make the user when the panorama outdoor scene shows that outer curtain is to roam in the realistic space mixing of background, also on the map of real world, roam, realized that the environment that the user is immersed in real world simultaneously can also understand own present located geographic position, more increased the sense of reality of roaming.
3. the present invention is mapped to the outer curtain of scene demonstration with the panorama real scene image and creates the real world scene, and mixing the inner 3D of interpolation of realistic space modeling entity, this method provides a new technology path for computer simulation real world scene, and user interface of the present invention is succinctly friendly, easy operating contains much information.
Description of drawings
Fig. 1 is a system architecture diagram;
Fig. 2 A, 2B mix realistic space structural representation (), (two) for what show outer curtain based on the spherical panorama outdoor scene;
Fig. 3 first visual angle continous way roaming program flow diagram;
The program flow diagram of Fig. 4 first visual angle great-jump-forward roaming;
The program flow diagram of Fig. 5 the 3rd visual angle roaming.
Embodiment
Embodiment 1
The inventive method is by organically combining the panorama real scene image in the scene that the panorama real scene image makes up as scene background and with 3D modeling entity, and so a kind of computer virtual scene that merges on scene content is called and is mixed reality.
The present invention mixes real platform construction method and is based upon on as shown in Figure 1 the system architecture basis, and its system architecture comprises: data management backstage 11 is made up of database 12, data storage cell 13,3D entity management unit 14; Application Program Interface 15 is made up of 3D display platform 16 and geographical information platform 17.
, be used for mixing the roaming of realistic space to data management backstage 11 request msgs (comprising panorama real scene image data and geographic information data) by Application Program Interface 15.
Present embodiment only utilizes the GPS device to gather outdoor geography information gps data.
3D entity management unit 14 is used to store the data messages such as longitude and latitude position, 3D entity place, 3D solid data and this user ID that the user adds, wherein user ID is used for rights management, has only the user who adds the 3D entity just to have authority that the 3D entity of its interpolation is deleted.
Present embodiment adopts the Application Program Interface 15 based on the MFC single document interface, embeds 3D display platform 16 in Application Program Interface 15, and embeds geographical information platform (present embodiment employing electronic chart).
The present invention mixes real platform construction method, at first utilizes the data acquisition platform collection to make up and mixes the needed raw data of real platform.Data acquisition platform is made up of panorama real scene image collecting device, geographical information collection equipment (present embodiment adopts gps system that outdoor geographic information data is gathered), data acquisition control program and data acquisition storer.Panorama real scene image collecting device (as the panoramic shooting head) is responsible for gathering panorama real scene image data; Geographical information collection equipment is gathered gps data; The data acquisition control program uses two threads to control panorama real scene image collecting device and geographical information collection equipment respectively, and adopt same clock frequency signal that panorama real scene image collecting device and geographical information collection equipment are carried out synchronous triggering, the panorama real scene image data and the pairing gps data of this frame of a frame are stored in the data acquisition storer respectively according to continuous mode.Each frame panorama real scene image data is preserved (such as saving as jpeg format or BMP form etc., this specific embodiment selects for use jpeg image format to store) separately, be stored at last in the data storage cell 13 on data management backstage 11; The gps data opening relationships table that deposit path that will each frame image data that data storage cell 13 is stored in data management backstage 11 is corresponding with this frame is stored in this relation table in the database 12 on data management backstage 11.So, the deposit path of every frame panorama real scene image is corresponding one by one with the gps data of these frame panorama real scene image data in database 12, can obtain data and its pairing gps data of this frame panorama real scene image by the deposit path of every frame panorama real scene image.
Panorama outdoor scene of the present invention mixes real platform construction method and may further comprise the steps:
1. in 3d space, create curtain outside the demonstration of spherical panorama outdoor scene
Adopt 3D graphic package interface (as OpenGL or Direct3D etc., present embodiment adopts OpenGL) create the three-dimensional environment that mixes realistic space, and in this mixes the three-dimensional environment of realistic space, draw scene and show outer curtain (scene of present embodiment shows that outer curtain adopts outside the spherical scene demonstration acts 22); The panorama real scene image data that collect are sent to 3D display platform 16 from data management backstage 11, adopt the texture mapping method in the 3D graphic package interface that panorama real scene image data texture is shown outer curtain 22 to spherical scene, can get the spherical panorama outdoor scene and show outer curtain;
2. create virtual ground and add the 3D entity
Above-mentioned virtual ground concrete method for building up in the present embodiment is as follows:
Set up virtual ground 21 in the curtain outside the spherical panorama outdoor scene that has built shows: virtual ground 21 is one can not meet, and is used to put 3D architectural entity 24 or 3D people entities 25 etc. in the realistic space in whole mixing.
In order to guarantee to observe from user's viewpoint, 3D architectural entity 24 shows that with the spherical panorama outdoor scene image scene on the outer curtain is corresponding, need guarantee that the image that shows on the curtain outside the spherical panorama outdoor scene shows is consistent with the perspective relation that mixes realistic space.This perspective relation is observed viewpoint height, virtual ground position and spherical panorama outdoor scene by the user and is shown that outer curtain epigraph perspective relation determines jointly.Present embodiment is drawn two parallel lines on virtual ground, corresponding with highway both sides straight line on the image.By regulating the height of viewpoint and virtual ground, when two parallel lines on the virtual ground and highway straight line coincide, show that perspective relation demarcates successfully, thereby determined the position of virtual ground and the position of user's viewpoint.
Loaming method on the virtual ground is as follows:
At first to demarcate distance on the virtual ground and the actual range relation in the real world.To in mixing realistic space from user's viewpoint to virtual ground distance and with actual photographed video camera center and ground actual range measure.The ratio of these two distances promptly can be used as and mixes the realistic space distance to actual range conversion scale, and this process is finished in initialization step.So, each position on the virtual ground all corresponding the longitude and latitude of a reality on the real world.The user roams track 23 shown in Fig. 2 A.The invention provides two kinds of roam mode in mixing realistic space: roaming of first visual angle and the roaming of the 3rd visual angle.Do in the present invention as giving a definition at first visual angle and the 3rd visual angle: first visual angle refers to that the displayed scene that the user is seen is the observed scene of user's usefulness eyes on the 3D display platform, the user can't see the 3D people entities of self, but can see other users' 3D people entities; The 3rd visual angle refers to that the user can be complete sees self the entity of representing this user in the space, also can see other users' entity, and when user subject moved, user's viewpoint can be followed the user and be handled entity and arrive the target location.
A. first visual angle roaming
The roaming of first visual angle is divided into two kinds of loaming methods, and a kind of is the continous way roaming, and another is the great-jump-forward roaming.
A) continous way roaming
The continous way roaming is to roam according to the image taking path.Wherein the initial position of viewpoint center on virtual ground of user's roaming is the initial point that mixes realistic space.The initial position at viewpoint center is corresponding with the actual latitude and longitude coordinates of present frame panorama real scene image.The height of viewpoint is as the criterion with the position of reserving in the acceptance of the bid of the position of virtual ground determining step.
Its program circuit as shown in Figure 3, concrete grammar is as follows:
(31,32) begin to carry out and the initialization first visual angle continous way roaming program;
(33) read the first frame panorama real scene image data and the pairing gps data of these panorama real scene image data that the path is roamed in preliminary election from data management backstage 11;
(34) in mixing realistic space panorama real scene image texture is arrived curtain outside the demonstration of spherical panorama outdoor scene, gps data is sent to geographical information platform 17 by routine interface and is used to upgrade the geographic position, and replacement user viewpoint position;
(35) judge that in roam procedure the current spherical panorama outdoor scene that is presented at shows whether the panorama real scene image on outer act arrives end frame; If panoramic picture arrival end frame, the then EOP (end of program) (37) of the first visual angle great-jump-forward roaming; Otherwise go to step (36);
(36) 16 beginnings of 3D display platform are to the gps data of data management backstage 11 request next frame panorama real scene image data and this frame panorama real scene image data correspondence.The panorama real scene image data texture of newly asking is shown outer curtain to the spherical panorama outdoor scene, and (the video camera rotation angle can be passed through gps data to calculate distance between present frame gps data and the previous frame gps data and video camera rotation angle, perhaps the outer parameter of camera calibration obtains, and present embodiment adopts gps data to obtain the video camera rotation angle);
Utilize the distance in the real world demarcated and mix corresponding relation between the distance in the realistic space, with viewpoint together with the spherical panorama outdoor scene show outer curtain move to the present frame gps data pairing mix the realistic space position, gps data is sent to geographical information platform renewal geographic position by routine interface simultaneously, goes to step (34).
B) great-jump-forward roaming
Great-jump-forward roaming can make the user show mixing in the realistic space scope that outer curtain covered in the spherical panorama outdoor scene of present frame, chooses the position of next step arrival from the path of stipulating arbitrarily, and at its corresponding panorama real scene image of this position display.Great-jump-forward roaming specific implementation method in the present embodiment as shown in Figure 4.
(41,42) begin to carry out and the initialization first visual angle great-jump-forward roaming program;
(43) being selected in an inner virtual ground or the 3D architectural entity of the outer curtain of spherical panorama outdoor scene demonstration by point roams, promptly with the mode of clicking obtain wish the in-position mix the realistic space coordinate, with this mix the realistic space coordinate projection on virtual ground (if directly be selected on the virtual ground, then do not need to carry out projection), obtain clicking the coordinate of position on virtual ground;
(44) initial position of viewpoint center on virtual ground is as the initial point that mixes realistic space, obtain and viewpoint the center actual range in real world and video camera rotation angle between the initial position on the virtual ground, calculate the actual longitude and latitude of this position;
(45) user judges whether to jump to selected position; Redirect if desired, subsequent steps (46) then, otherwise go to step (44);
(46) the actual geographic position that calculating is tried to achieve sends back data management backstage 11, in database 12, search deposit path with the most contiguous panorama real scene image information in this geographic position, and in data storage cell 13, panorama real scene image data are extracted, transmit back 3D display platform 16, on new position, repaint curtain outside the spherical scene, on geographical information platform 17, upgrade the current geographic position of user simultaneously;
(47) user judges whether to quit a program, as quits a program, then the EOP (end of program) (48) of the first visual angle great-jump-forward roaming; As not withdrawing from, then go to step (44).
B. the 3rd visual angle roaming
The 3rd visual angle roaming specific implementation method in the present embodiment as shown in Figure 5.
(51) begin to carry out the 3rd visual angle roaming program;
(52) roaming program in initialization the 3rd visual angle limits the roaming range of user subject in virtual ground position, present frame scene place;
The present invention does not have special provision to the shape of roaming range, can be the zone of shapes such as circle or rectangle.Present embodiment adopts border circular areas, and user's people entities is in the radius decision of present frame random zone radius outer curtain by spherical scene, in the present embodiment random zone radius be the spherical panorama outdoor scene show outer act radius about 1/2.
(53) handle the pairing 3D people entities 25 of user self and on the residing virtual ground 21 of present frame, begin roaming (concrete method of operating belongs to prior art, embodies) in program.Because each point on the virtual ground 21 is all represented the actual latitude and longitude coordinates of real world.Therefore the roaming distance of this 3D people entities 25 on virtual ground 21 represented the actual range corresponding with real world too.
(54) when the user handles 3D people entities 25 away from initial position, calculate 3D people entities 25 current positions and the distance of initial position in mixing realistic space, and with respect to the video camera rotation angle of initial position.This distance that mixes in the realistic space is changed according to demarcating the good transformational relation that mixes realistic space and real world distance, obtained the distance of 3D people entities 25 positions and this initial position in real world.Because the longitude and latitude of known initial position, can utilize actual range between the video camera rotation angle that obtained and two positions to try to achieve the latitude and longitude coordinates of 3D people entities 25 position reality;
(55) user judges whether its viewpoint needs to jump to 3D people entities 25 present positions; When user's viewpoint need jump to 3D people entities 25 present positions, subsequent steps (56), otherwise go to step (54)
(56) when user's viewpoint need jump to 3D people entities 25 present positions, the actual geographic position that calculates is sent back data management backstage 11, in database 12, search deposit path with the most contiguous panorama real scene image information in this geographic position.In data storage cell 13, panorama real scene image data are extracted, and the result is transmitted back to 3D display platform 16, on new position, draw curtain outside the spherical scene, on geographical information platform 17, upgrade the current geographic position of user simultaneously.
(57) user judges whether to quit a program, as quits a program, then the 3rd visual angle roaming EOP (end of program) (58); As not withdrawing from, then go to step (54).
(the 3D entity comprises personage and the various entities except that the personage to present embodiment with the 3D entity of 3D display platform 16 outsides, as sign, buildings etc., import in the 3D display platform down together), concrete introduction method is as follows: will utilize 3D modeling tool (as 3D modeling softwares such as MAYA or 3DMax) to set up good 3D solid model file to store as file layouts such as .3ds .max or .ma, obtain the raw data (these raw data comprise the position of the Points And lines of 3D entity in the space, and surperficial pinup picture data) of 3D entity.Utilize routine interface to read in 3D display platform 16 raw data of these Points And lines etc., realize the importing of 3D entity.
In roam procedure, the radius size decision of curtain outside the scope that the 3D entity shows in mixing realistic space is shown by the spherical panorama outdoor scene.Be specially, the radius that the 3D entity shows outside the distance of outer curtain viewpoint center should show less than the spherical panorama outdoor scene act in the position of virtual ground and present frame spherical panorama outdoor scene, in this scope, as seen the 3D entity mixes in the realistic space present frame.
3. the geographic information data (electronic map data) that will mix realistic space and real world is synchronous
The user is when the virtual ground roaming that mixes realistic space, and along with the change of roaming scence, its geographic position is also changing.The geographic information data that the spherical panorama outdoor scene is shown the pairing real world of outer curtain current frame image, it is gps data, by 3D display platform 16 and geographical information platform 17 is that routine interface between the electronic chart passes to the preprepared electronic chart in real time, demarcates and upgrade the current location of user's roaming on electronic chart.
It is as follows to mix the synchronous detailed process of realistic space and electronic map data:
Shown in Fig. 2 B, geographical information platform 17 with two dimension electronically Figure 26 form embed Application Program Interface 15.The gps data that the two dimension electronic chart can obtain user of current roaming position by the electronic chart and the data-interface function in the 3D display platform 16 of form web page.The api function that utilizes two-dimentional electronic chart is calibrating this user geographic position 27 on map with icon by the gps data of the user of current roaming position that obtained on the electronic chart.In the said process, the two dimension electronic chart carries out a secondary data by the data-interface function of carrying out 3D display platform 16 every 500ms (this numerical value can change according to the real-time needs) and obtains the geographic position 27 of renewal user on electronic chart in Figure 26 electronically.
Embodiment 2
Difference from Example 1 is:
The outer curtain of described scene be shaped as cubic space (regular hexahedron).
The method of adding the 3D entity in mixing realistic space is to utilize 3D graphic package interface mixing the inner 3D of establishment of realistic space entity, and is specific as follows:
The user can observe some buildingss or place in the curtain outside cube panorama outdoor scene shows in the process of roaming, and in real scene, many buildingss, place etc. do not have significant identification marking.Present embodiment adopts 3D graphic package interface to add the 3D entity in the curtain outside cube panorama outdoor scene shows, present embodiment is an example with the virtual identifying board, and for the user has solved the problem that mixes scenery identification in the realistic space process in roaming, the specific implementation method is:
In the 3D entity management unit 14 in data management backstage 11 in advance with the attribute information of 3D virtual identifying board (as in the place of virtual identifying board real world latitude and longitude information, Sign Board is towards the angle, the size of Sign Board, pattern, the literal of writing, information such as font) store.When the user is mixing when roaming into this geographic position in the realistic space, data management backstage 11 will be transferred to 3D display platform 16 at 3D entity informations such as the 3D of current geographic position virtual identifying boards by routine interface in the 3D entity management unit 14, in 3D display platform 16, utilize 3D graphic package interface to draw the virtual identifying board, be used for indicating specific buildings of scene or place etc.
Embodiment 3
Difference from Example 1 is:
The outer curtain of described scene is shaped as cylindrical space.
In the method that mixes realistic space inside interpolation 3D entity is to utilize 3D graphic package interface mixing to create the 3D entity in the realistic space, and will mix realistic space in the 16 outside 3D solid models importings of creating of 3D display platform.
The outer curtain structure of scene of the present invention can also be created as other enclosure space solid.
Above embodiment is only for explanation the present invention; but not limitation of the present invention; relevant technologies field personnel are under the situation that does not break away from the spirit and scope of the present invention; can also make various conversion and distortion, so the technical scheme of all equivalent variations should belong to also within the category of claim protection of the present invention.
Claims (11)
1. a panorama outdoor scene mixes real platform construction method, it is characterized in that may further comprise the steps:
1) in 3d space, creates curtain outside the demonstration of panorama outdoor scene
Adopt 3D graphic package interface to create the three-dimensional environment that mixes realistic space, and in mixing the three-dimensional environment of realistic space, draw curtain outside the scene demonstration; The panorama real scene image data that collect are sent to 3D display platform the Application Program Interface from the data management backstage, texture shows outer scene plot face to scene, and the panorama outdoor scene that obtains to mix in the realistic space shows outer act;
2) create virtual ground and add the 3D entity
Show outer act the virtual ground that foundation is used to put the 3D entity in the realistic space that mixes what built based on the panorama outdoor scene, promptly showing that based on the panorama outdoor scene outer act the 3D entity that shows in the realistic space that mixes adds on the virtual ground, roams on the virtual ground that the user creates in mixing realistic space current;
3) it is synchronous to mix the geographic information data of realistic space and real world
To show that the geographic information data that mixes the pairing real world of realistic space current frame image of outer curtain passes to the preprepared geographical information platform in real time by the routine interface between 3D display platform and the geographical information platform based on the panorama outdoor scene, on geographical information platform, demarcate and upgrade the position of user of current roaming.
2. mix real platform construction method by the described panorama outdoor scene of claim 1, it is characterized in that: described mix reality be meant by with the panorama real scene image as scene background, and 3D modeling entity is organically combined in the scene of panorama real scene image structure the computer virtual scene that on scene content, merges.
3. mix real platform construction method by the described panorama outdoor scene of claim 1, it is characterized in that the preparation of described panorama real scene image data and geographic information data comprises:
Utilize the data acquisition platform collection to make up and mix the needed raw data of real platform, the panorama real scene image data and the pairing geographic information data of this frame of one frame are stored respectively in the data acquisition storer according to continuous mode, and dumped in the data storage cell on data management backstage;
The geographic information data opening relationships table that deposit path that will each frame image data that data storage cell is stored in the data management backstage is corresponding with this frame is stored in relation table in the database on data management backstage.
4. mix real platform construction method by the described panorama outdoor scene of claim 1, it is characterized in that: described establishment virtual ground may further comprise the steps:
Show in the panorama outdoor scene that built and mixing of outer act place to set up one in the realistic space and can not meet as virtual ground;
Determine the position of above-mentioned virtual ground in mixing realistic space, consistent to guarantee the image that outside the panorama outdoor scene shows, shows on the curtain with the perspective relation that mixes realistic space.
5. mix real platform construction method by the described panorama outdoor scene of claim 1, it is characterized in that: described interpolation 3D entity is:
To import at the 3D solid model that mixes the outside establishment of realistic space and mix in the realistic space, before promptly roaming on the virtual ground in mixing realistic space, the 3D solid model file that utilizes the 3D modeling tool to set up is carried out data storage, obtain the raw data of 3D entity, utilize routine interface to read in the 3D display platform described raw data again.
6. mix real platform construction method by the described panorama outdoor scene of claim 1, it is characterized in that: described interpolation 3D entity is:
Mixing the inner 3D of interpolation of realistic space entity, promptly will prepare mixing the 3D attributes of entities information of drawing in the realistic space in the 3D on data management backstage entity management unit earlier stores, when the user is mixing the geographic position of the 3D entity that roams into above-mentioned preparation drafting in the realistic space, the data management backstage will be transferred to the 3D display platform in the 3D of current geographic position entity attribute information by routine interface in the 3D entity management unit, utilizes 3D graphic package interface drafting 3 D entity in the 3D display platform.
7. mix real platform construction method by the described panorama outdoor scene of claim 1, it is characterized in that: the described roaming on virtual ground may further comprise the steps:
Distance on the virtual ground and the actual range relation in the real world are demarcated, promptly in mixing realistic space from user's viewpoint to virtual ground distance and the camera lens primary optical axis of panorama real scene image collecting device measure to the ground actual range, the ratio of these two distances transforms scale as mixing the realistic space distance to actual range;
In can not observing self the displayed scene of 3D people entities, the user carries out the roaming of first visual angle; Perhaps can complete observation in the displayed scene of himself 3D people entities, carry out the roaming of the 3rd visual angle the user.
8. mix real platform construction method by the described panorama outdoor scene of claim 6, it is characterized in that: the roaming of described first visual angle is the continous way roaming, is specially:
Begin to carry out and the initialization first visual angle continous way roaming program;
Read the first frame panorama real scene image data and the pairing geographic information data of these panorama real scene image data in preliminary election roaming path from the data management backstage;
With panorama real scene image texture curtain outside scene shows, gps data is sent to geographical information platform by routine interface and is used to upgrade the geographic position, and replacement user viewpoint position in mixing realistic space;
Judge that the current panorama outdoor scene that is presented at shows whether the panorama real scene image on the outer curtain arrives end frame;
If the arrival end frame, then the first visual angle continous way roaming program is carried out and is finished;
Perhaps, if do not arrive end frame, then the 3D display platform begins the geographic information data to data management background request next frame panorama real scene image data and this frame panorama real scene image data correspondence, with panorama real scene image data texture curtain outside scene shows of newly asking, and calculate the geographic information data of present frame and the rotation angle of distance between the previous frame geographic information data and panorama real scene image collecting device;
Utilize reality distance of having demarcated and the corresponding relation that mixes the realistic space distance, with viewpoint together with the panorama outdoor scene show outer curtain move to the present frame geographic information data pairing mix the realistic space position, geographic information data is sent to geographical information platform by routine interface and upgrades the geographic position simultaneously;
Go to " with panorama real scene image texture curtain outside scene shows, geographic information data is sent to geographical information platform by routine interface and is used to upgrade the geographic position, and replacement user viewpoint position in mixing realistic space " step.
9. mix real platform construction method by the described panorama outdoor scene of claim 7, it is characterized in that: the roaming of described first visual angle is the great-jump-forward roaming, is specially:
Begin to carry out and the initialization first visual angle great-jump-forward roaming program;
Be selected in an inner virtual ground or the 3D architectural entity of the outer curtain of panorama outdoor scene demonstration by point and roam, obtain clicking the coordinate of position in virtual ground;
The initial position of viewpoint center on virtual ground is as the initial point that mixes realistic space, obtain and the rotation angle of viewpoint the center actual range in real world and panorama real scene image collecting device between the initial position on the virtual ground, calculate the actual longitude and latitude of this initial position;
The user judges whether to jump to selected position; Redirect if desired, next step then continues;
The physical location that calculating is tried to achieve sends back the data management backstage, in database, search deposit path with the most contiguous panorama real scene image information in this position, and in data storage cell, panorama real scene image data are extracted, transmit back the 3D display platform, on new position, repaint curtain outside the demonstration of panorama outdoor scene, on geographical information platform, upgrade the current geographic position of user simultaneously;
The user judges whether to quit a program, as quits a program, then the EOP (end of program) of the first visual angle great-jump-forward roaming;
Perhaps, as not withdrawing from the first visual angle great-jump-forward roaming program, then go to " initial position of viewpoint center on virtual ground is as mixing the initial point of realistic space; obtain and the rotation angle of viewpoint the center actual range in real world and panorama real scene image collecting device between the initial position on the virtual ground, calculates the actual longitude and latitude of this initial position " step;
Perhaps, if do not need to jump to selected position then go to " initial position of viewpoint center on virtual ground is as mixing the initial point of realistic space; obtain and the rotation angle of viewpoint the center actual range in real world and panorama real scene image collecting device between the initial position on the virtual ground, calculates the actual longitude and latitude of this initial position " step.
10. mix real platform construction method by the described panorama outdoor scene of claim 7, it is characterized in that: the roaming of described the 3rd visual angle may further comprise the steps:
Begin to carry out the 3rd visual angle roaming program;
Roaming program in initialization the 3rd visual angle limits the roaming range of user subject in virtual ground position, present frame scene place;
Handle the pairing 3D people entities of user self and on the residing virtual ground of present frame, begin roaming;
When the user handles the 3D people entities away from initial position, calculate current position of 3D people entities and initial position in mixing realistic space distance and with respect to the rotation angle of the panorama real scene image collecting device of initial position;
The user judges whether its viewpoint needs to jump to 3D people entities present position;
When user's viewpoint need jump to 3D people entities present position, next step continued;
The physical location that calculates is sent back the data management backstage, in database, search deposit path with the most contiguous panorama real scene image information in this position, in data storage cell, panorama real scene image data are extracted, and the result is transmitted back to the 3D display platform, on new position, draw curtain outside the spherical scene, on geographical information platform, upgrade the current geographic position of user simultaneously;
The user judges whether to quit a program, as quits a program, then the 3rd visual angle roaming EOP (end of program);
Perhaps, as not withdrawing from the 3rd visual angle roaming program, then go to " when the user handles the 3D people entities away from initial position, calculate current position of 3D people entities and initial position in mixing realistic space distance and with respect to the rotation angle of the panorama real scene image collecting device of initial position " step;
Perhaps, if judging its viewpoint, the user do not need to jump to 3D people entities present position, then go to " when the user handles the 3D people entities away from initial position, calculate current position of 3D people entities and initial position in mixing realistic space distance and with respect to the rotation angle of the panorama real scene image collecting device of initial position " step.
11. mix real platform construction method by the described panorama outdoor scene of claim 1, it is characterized in that: described panorama outdoor scene shows that outer curtain adopts spherical, cube shaped, the cylinder bodily form.
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