Augmented real-estate model and associated production method

Abstract

The invention relates to an augmented real-estate model (10) comprising: - projection means (13); - a supervision member (14); and - a support (11) comprising: locations comprising means for positioning a base so that the base is placed in a three-dimensional reference frame of each location providing position information; and means (25) for identifying the buildings (12) and / or neighbourhoods placed in an urban environment (20) which are configured to detect an identification device embedded in each base (16); the supervision member (14) being configured to select a three-dimensional model (15) from among a set of three-dimensional models which is associated with the different buildings (12) and / or neighbourhoods placed in the urban environment (20), so as to control the projection means (13) in order to project textures onto the given buildings (12) and / or neighbourhoods.

Description

[0001] AUGMENTED REAL ESTATE MODEL AND METHOD OF

[0002] ASSOCIATED PRODUCTION

[0003] TECHNICAL FIELD

[0004] The invention relates to a real estate model incorporating juxtaposed buildings to represent a miniature urban environment. A real estate model is traditionally used to present a real estate project to local residents or investors. In certain contexts, a real estate model is also called an urban planning model.

[0005] The invention relates more particularly to an augmented real estate model, that is to say a real estate model on which visual elements are added by projection means external to the buildings of the real estate model.

[0006] Furthermore, the invention also relates to the associated production method.

[0007] STATE OF THE ART

[0008] To present an urban planning project for a city or local authority, it is traditional to create a model to present the future project. Nowadays, these models are still mostly physically created by model makers, i.e., people specialized in building modeling. These model makers create an urban environment by manufacturing buildings using wooden or plastic structures and positioning a large number of decorative elements, such as windows, trees, or bus shelters, to embellish the buildings and give realism to the urban environment. Even today, all buildings and decorative elements are most often hand-painted to simulate the expected realism of the urban environment.

[0009] When it is not required to provide a physical real estate model, it is also known to illustrate urban development projects by means of a virtual real estate model, also called a "3D model", with which users can interact to visualize different stages or angles of an urban environment project. For example, patents FR 3 080 471 and WO 2022 / 147202 propose solutions for providing fully virtual real estate models. In addition to virtual models, it is also known to perform augmented reality on physical real estate models by using images projected onto buildings that are not painted.

[0010] For example, US 7,068,274 proposes using two projectors to apply lighting effects to a building. More specifically, this document proposes detecting the position of an observer to adapt the projected images according to their position.

[0011] This method allows for a high level of detail on an augmented real estate model, but it can only be implemented to present the real estate model to a single person, whereas it is often desired to present the real estate model to several people simultaneously.

[0012] Furthermore, to achieve effective realism in the positioning of textures for augmented real estate models, it is necessary to know precisely the position of the different buildings in the urban environment represented by the real estate model. To solve this problem, document US 7,068,274 proposes using four three-dimensional markers in the form of uprights extending around a building. These uprights rise substantially to the height of the building, so that the presence of these uprights limits the possibility of installing several buildings to form an urban environment.

[0013] Typically, to have a high level of detail, it may be sought to have a precision of the order of a millimeter in the positioning of the projected images in relation to the buildings in order to be able to apply precise details on the topologies of the buildings, that is to say details close to those that can be achieved by modelers with physical and hand-painted models.

[0014] Indeed, a supervisory body of the augmented real estate model is configured from a three-dimensional model of the urban environment and at least one piece of information on the position of the buildings in the urban environment so that the supervisory body can control the projection means. In practice, this phase of detecting the position of buildings and districts allowing the recalibration of the protection means can take several hours.

[0015] Furthermore, it may be desirable to provide real estate models with several possible locations, for example to illustrate the evolution of a neighborhood, a city over the years or during different phases of future work. This type of demonstration requires modifying certain buildings or certain neighborhoods of an urban environment. To do this, it is currently common to use several physical models made by hand, but there is no solution allowing the interchange of buildings and / or neighborhoods of an augmented real estate model due to the problems of realigning the positions that these modifications would require.

[0016] The technical problem of the invention is therefore to provide an augmented real estate model allowing interchangeability of buildings and / or districts of an urban environment that is simpler and quicker to implement.

[0017] INVENTION

[0018] To address this technical problem, the invention proposes to provide a support for fixing buildings and / or districts to form an urban environment and to integrate locations into this support. Thus, this support makes it possible to receive different types of buildings or districts so that the buildings or districts can be interchanged by changing at least one base on which the buildings or districts are fixed.

[0019] To limit the problems of recalibrating the projection means, each location has positioning means allowing the base to be moved on a three-dimensional reference point so that a supervisory body can know the position of the buildings by knowing the position of the associated base.

[0020] Furthermore, the support also includes means of identifying buildings or districts placed in the urban environment by detecting an identification device integrated into each base.

[0021] Thus, the invention makes it possible to obtain an augmented real estate model in which buildings or districts can be easily interchanged while still achieving the dynamism and particularly interesting rendering of augmented real estate models. The invention makes it possible, for example, to obtain projections of images and video animations with details of the order of a millimeter, that is to say with as much detail as those currently obtained by model makers.

[0022] To this end, according to a first aspect, the invention relates to an augmented real estate model, said model comprising:

[0023] - a support on which a set of buildings and / or districts are fixed to form an urban environment;

[0024] - projection means arranged above the support so as to illuminate the buildings and / or districts; and

[0025] - a supervisory body integrating a three-dimensional model of said urban environment and information on the position of the buildings and / or districts so as to control the projection means in order to project textures onto the buildings and / or districts.

[0026] The invention is characterized in that the support comprises:

[0027] - locations allowing the integration of several separate buildings and / or districts; the buildings and / or districts comprising a base intended to be fixed in the locations; each location comprising means for positioning the base so that the base is placed in a three-dimensional reference frame of each location providing the position information; and

[0028] - means for identifying buildings and / or districts placed in the urban environment configured to detect an identification device integrated into each base; the supervisory body being configured to select a three-dimensional model, from a set of three-dimensional models, associated with the building and / or distinct districts placed in the urban environment so as to control the projection means in order to project textures onto the buildings and / or districts used.

[0029] With these means of positioning and detecting interchangeable bases in locations, the invention makes it possible to directly recalibrate, and without using a long and complex calibration process, projections on a physical model so as to obtain an augmented real estate model.

[0030] The locations may correspond to non-through holes formed in an upper face of the support. This upper face of the support may include topologies in order to illustrate the variations in flatness of the terrain on which the urban environment is formed. Thus, in one embodiment, the bases do not cover the entire upper face of the support and a portion of the upper face of the support is visible and cannot be modified.

[0031] Preferably, in order to be able to modify the entire surface of the urban environment, all of the juxtaposed supports cover the entire upper face of the support in order to illustrate the buildings and the variations in flatness of the land. In this embodiment, the interchangeable bases can have distinct thicknesses to illustrate real estate projects involving phases of backfilling or clearing the land.

[0032] The locations made in the support may have variable dimensions provided that the different bases intended to be positioned in the locations have dimensions adapted to those of the locations predestined for these bases. Preferably, when the bases all cover the urban environment, the locations are all of identical dimensions.

[0033] The locations may be square or rectangular in shape and the bases may cooperate with the locations to provide means for mechanically correcting the expected orientation of the base relative to each location, for example a system of male / female notches. On each base, one or more buildings may be fixed with a sufficiently strong anchorage with the base so as to limit variations in relative position between the buildings and the associated base.

[0034] To achieve this, the building uprights can be screwed or glued to the base. Preferably, the buildings are made with the base by three-dimensional printing from a three-dimensional model, thus ensuring the relative position of the buildings to the base.

[0035] The support can be a wooden support or a plastic support. For example, a plastic support can be thermoformed according to the expected position of the slots. Similarly, the base can also be made of a piece of wood or plastic without changing the invention.

[0036] An identification device is integrated into the base to detect the presence of a specific base in a location. For example, the identification device may be an RFID tag for "Radio-Frequency Identification." With this RFID technology, the base may include one or more RFID readers to list the different bases positioned at the different locations. To do this, an RFID reader may be attached below each location, or a single RFID reader may be used to capture RFID tags from multiple locations.

[0037] By knowing the identification codes of the RFID tags of the different bases present in the locations, the supervisory body can thus identify the three-dimensional model integrating the different buildings and / or districts corresponding to these bases.

[0038] To obtain an accurate display of the textures on these buildings and / or these districts, each location is provided with positioning means so that the different bases reach three-dimensional reference points of each location. For example, a three-dimensional reference point may correspond to a corner of the location. To constrain the base to a specific corner of a location, the positioning means may correspond to springs, magnetic means or jacks exerting constant pressure on the base to constrain it to bear on the three-dimensional reference point.

[0039] Taking the example of magnetic means, each location and each base can incorporate magnets of opposite poles so that the base is attracted to each location on the three-dimensional frame.

[0040] With these different elements, the supervisory body can therefore select in real time the three-dimensional model corresponding to the elements placed on the model by modifying the projected image to adapt the textures, so that a user can easily develop the model and obtain an effective rendering.

[0041] The detection of changes to a building and / or a district can be carried out automatically by the supervisory body by regularly detecting, for example every second or every minute, when new RFID tags are detected by the RFID readers. Alternatively, the detection of a new base can be carried out by a mechanical element having a specific shape that can be detected by a sensor of the support.

[0042] A user can also manually indicate when a change has been made. To do this, a human-machine interface, such as a touchscreen, can be attached to the bracket.

[0043] This human / machine interface can highlight different parts of the model by modifying the projections made on this model, for example to target a district or an apartment in a building.

[0044] It is also possible to modify the display of the supervisory device through a remote terminal, such as a tablet or a smartphone. In this embodiment, the supervisory device integrates means for wirelessly receiving commands transmitted by a user. Conventionally, it is possible to limit interactions originating from wireless communications to referenced users by means of IT security solutions, for example means for encrypting communications and for authenticating users with restricted rights.

[0045] Thus, the invention simply makes it possible to modify buildings and / or districts of an augmented real estate model while adjusting the projection made on the buildings and / or districts of the urban environment. Furthermore, the console or mobile terminal also makes it possible to modify the projections made to provide different information to one or more users.

[0046] To do this, the supervisory body must integrate several three-dimensional models of the urban environment represented by the model based on the different possible locations of the buildings and / or districts. These three-dimensional models can also be defined and / or used during the process of creating the buildings and / or districts of the real estate model. Indeed, it is particularly interesting to automatically create the buildings and / or districts with the base by additive manufacturing so as to be able to control the topology of the elements created during additive printing and to be able to modify the three-dimensional model according to the specific parameters of the elements created.

[0047] To do this, according to a second aspect, the invention relates to a method for producing an augmented real estate model according to the first embodiment of the invention. This production method includes the following steps:

[0048] - additive manufacturing of a building and / or a district on a base based on an initial three-dimensional model; and

[0049] - measurement of the relative position of the elements produced in relation to the base in order to obtain a three-dimensional model corrected according to the relative position of the elements in relation to the base.

[0050] This measurement can be carried out at the end of or during the additive construction of the building and / or the district on the base.

[0051] DESCRIPTION OF FIGURES

[0052] The manner of carrying out the invention as well as the advantages which result therefrom will emerge clearly from the following embodiments, given for informational but non-limiting purposes, in support of the appended figures in which figures 1 to 8 represent: [Fig 1]: a schematic cross-sectional representation of an augmented real estate model according to an embodiment of the invention;

[0053] [Fig 2]: a schematic representation from above of a support for the augmented real estate model of figure 1;

[0054] [Fig 3]: a schematic cross-sectional representation of a building mounted on a base of the augmented real estate model of figure 1;

[0055] [Fig 4]: a perspective view of a building mounted on a base of the augmented real estate model of figure 1;

[0056] [Fig 5]: a perspective view of the building in figure 4 on which a projection is made;

[0057] [Fig 6]: a perspective view of the building in Figure 4 built on several bases; and

[0058] [Fig 7]: A perspective view of an urban environment from the augmented real estate model in Figure 1.

[0059] DESCRIPTION OF THE INVENTION

[0060] Figure 1 illustrates an augmented real estate model 10 formed by a support 11 on which interchangeable buildings 12 or districts are fixed.

[0061] The support 11 may correspond to a parallelepiped table with legs 30 made of wood, plastic or metal. Above the support 11, light sources 13 are positioned to project one or more images onto the buildings 12. These light sources 13 may be fixed to the support 11 by metal ladders or uprights 31, or integrated into a ceiling placed above the support 11. To fix the buildings 12 to the support 11, the latter has locations 17, as illustrated in FIG. 2. Each location 17 is provided with positioning means 18 in order to move a base 16, on which a building 12 and / or a district is fixed, onto a three-dimensional reference frame 19.

[0062] The positioning means 18 may correspond to springs, magnetic means or jacks and the three-dimensional reference mark 19 may correspond to the angle of a location 17. This three-dimensional reference mark 19 may also correspond to the center of the location 17 with positioning means placed on each side of the location 17 so as to obtain precise centering of the base 16. Furthermore, the three-dimensional reference mark 19 may integrate means for detecting the position of the base 16 so that the positioning means 18 may be controlled to align a means for detecting the position of the triangular reference mark 19 with a locating means on the base 16.

[0063] For example, the base 16 may incorporate a target in its lower face and the three-dimensional marker 19 may incorporate a reader configured to detect the target in order to ensure precise positioning of the base 16 relative to the triangular marker 19.

[0064] Whatever the positioning means 18 used, the base 16 must be precisely positioned relative to the three-dimensional reference point 19, so as to be able to automate the projection of the images by the light sources 13.

[0065] To do this, a supervisory body 14 integrated in the support 11 must detect which buildings 12 and / or districts are mounted on the different bases 16 installed in the different locations 17. Preferably, as illustrated in FIG. 3, the base 16 integrates an identification device 24, for example an RFID tag. One or more RFID readers 25 are also integrated in the support 11 and under the locations 17 so as to detect the different RFID tags 24 of the different bases 16. These readers 25 transmit information on the type of building present on the support 11 so that the supervisory body 14 can find a three-dimensional model stored in a database 15 and corresponding to a three-dimensional representation of the urban environment 20 thus formed.

[0066] The supervisory body 14 therefore recovers this three-dimensional model in order to control the projection means 13 and in order to obtain a particularly effective rendering on the buildings 12.

[0067] This rendering is illustrated in Figures 5 and 7 and makes it possible to transform buildings 12 without any coloring, as illustrated in Figure 4, into buildings 12 providing a realistic rendering. Indeed, as illustrated in Figure 5, each detail from the balcony 32 to the color of the trees or even the name of the street 33 are obtained by the projection. Furthermore, the projection can be dynamic to simulate the wind in the trees by applying small modifications to the color of the trees over time.

[0068] The augmented real estate model 10 preferably has a console 21 on which a user can select modifications to the projection zones so as to highlight a district, a building or even an apartment present in a building 12. Furthermore, it is also possible to control modifications to the display of the supervision unit 14 by means of a smartphone 22 communicating wirelessly with the supervision unit 14.

[0069] To obtain such a real estate model 10, it is preferable to produce the buildings 12 directly with each base 16 using additive manufacturing, for example by producing the buildings 12 from plastic. Preferably, white or gray plastic is used to facilitate projection onto these buildings 12. This three-dimensional production of the buildings 12 on the different bases 16 also makes it possible to measure, during or at the end of production, the variations in relative position of the buildings 12 with respect to the base 16. Thus, when a base 16 is detected as being placed on one of the locations 17, it is possible to recalculate the dimensional model based on the variations in position to the nearest micrometer of the building 12 with respect to the base 16.

[0070] Furthermore, a building 12 can be made of several parts 34a-34f, as illustrated in FIG. 6, without changing the invention. Thus, the parts 34a-34f are mounted juxtaposed in a location and form several juxtaposed bases in which at least one base incorporates an identification device 24.

[0071] With all these corrections applied by the invention, it is possible to obtain a rendering with an accuracy of the order of a hundred micrometers, that is to say a particularly precise rendering. The invention thus makes it possible to provide an augmented real estate model 10 making it possible to replace the physical models widely used for their ease of modification of buildings.

[0072] Indeed, with the augmented real estate model 10 of the invention, it is now possible to obtain a capacity for modifying parts as efficiently as with a physical model painted by hand. Unlike the physical model, the production time is much lower, in particular thanks to the use of additive manufacturing of the buildings 12 and the use of projection to form the textures on these buildings 12.

Claims

CLAIMS 1. Augmented real estate model (10), said model (10) comprising: - a support (11) on which a set of buildings (12) and / or districts are fixed to form an urban environment (20); - projection means (13) arranged above the support (11) so as to illuminate the buildings (12) and / or the districts; and - a supervision body (14) integrating at least one three-dimensional model (15) of said urban environment (20) and information on the position of the buildings (12) and / or the districts so as to control the projection means (13) in order to project textures onto the buildings (12) and / or the districts; characterized in that the support (11) comprises: - locations (17) allowing the integration of several buildings (12) and / or distinct districts; the buildings (12) and / or districts comprising at least one base (16) intended to be fixed in the locations (17); each location (17) comprising means (18) for positioning the base (16) so that the base (16) is placed on a three-dimensional reference mark (19) of each location (17) providing the position information; and - identification means (25) of the buildings (12) and / or the districts placed in the urban environment (20) configured to detect an identification device (24) integrated in each base (16); the supervision member (14) being configured to select a three-dimensional model (15), from a set of three-dimensional models, associated with the buildings (12) and / or the distinct districts placed in the urban environment (20), so as to control the projection means (13) in order to project textures onto the buildings (12) and / or the districts used.

2. Augmented real estate model according to claim 1, in which the locations (17) correspond to non-through holes formed in an upper face of the support (11).

3. Augmented real estate model according to claim 2, wherein said upper face of the support (11) comprises topologies.

4. Augmented real estate model according to one of claims 1 to 3, in which each base (16) supports at least one building (12) whose uprights are screwed or glued onto the base (16).

5. Augmented real estate model according to one of claims 1 to 3, in which each base (16) and at least one building (12) are produced by three-dimensional printing from a three-dimensional model.

6. Augmented real estate model according to one of claims 1 to 5, in which the identification device (24) integrated in each base (16) corresponds to an RFID tag.

7. Augmented real estate model according to one of claims 1 to 6, in which the positioning means (18) correspond to springs, magnetic means or jacks.

8. Augmented real estate model according to one of claims 1 to 7, in which the augmented real estate model (10) integrates a human / machine interface (21).

9. Augmented real estate model according to one of claims 1 to 8, in which the supervision member (14) integrates means for wirelessly receiving commands transmitted by a user.

10. Method for producing an augmented real estate model (10) according to one of claims 1 to 9, the method integrating the following steps: - additive manufacturing of a building (12) and / or a district on a base (16) based on an initial three-dimensional model; and - measurement of the relative position of the elements produced in relation to the base (16) so as to obtain a three-dimensional model corrected according to the relative position of the elements in relation to the base.

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