WO2018100319A1

WO2018100319A1 - Video mapping system incorporating a mechanical support for a display

Info

Publication number: WO2018100319A1
Application number: PCT/FR2017/053336
Authority: WO
Inventors: Julien BERTA
Original assignee: Smart Pixels
Priority date: 2016-12-04
Filing date: 2017-12-01
Publication date: 2018-06-07
Also published as: FR3059863B1; FR3059863A1

Abstract

The present invention concerns a video mapping system (100) comprising: - a fixed video projector (10) able to project at least one image stream according to a determined projection field; - a mechanical support (20); - first assembly means (30) configured for securely assembling a determined removable object (O) on the mechanical support (20) in such a way that said object (O) is positioned in the projection field of the video projector (10), the first assembly means (30) being provided with a foolproofing system (40) ensuring a unique positioning and orientation of the object (O) relative to the video projector when the former is assembled on the mechanical support (20) in such a way as to hold constant the extrinsic parameters of the projection in order that the image stream coincides perfectly with the contours, shape and relief of the object.

Description

INTEGRATING VIDEO MAPPING SYSTEM

A MECHANICAL SUPPORT FOR DISPLAY

Technical area

The present invention relates to the field of video mapping (or video mapping), also known as projection mapping.

The video mapping, or projection mapping, consists mainly of projecting at least one image or a flow of images on a two-dimensional or three-dimensional object.

Video mapping can recreate images or videos on objects.

Video mapping is therefore a projection technology that transforms objects, often of irregular shapes, into display surfaces for projecting images or video. These augmented objects can be complex architectural landscapes such as a building (cathedral, church, historical monument, etc.) as well as smaller objects such as everyday consumer goods such as clothing, shoes, a handbag, toys; they can also be objects of the model or prototype type.

One of the objectives of the present invention is to design a video mapping system incorporating a rack-type support adapted for the correct positioning of the object to be increased so that the flow of images coincides perfectly with the outlines, the shapes and the relief. of the object to increase.

The present invention thus finds many advantageous applications in the field of sales by making it possible to present, in a display or display case, objects intended to be increased, that is to say objects on which a plan is projected. determined image flow.

An example of advantageous application of the invention may relate for example to the possibility in a car dealership to present the various configurations and possible options of a vehicle. We then understand that the seller must be able to position several miniature models of cars for presentation to his client and for each model the video mapping system will project the image flow associated with the model on the display. Another example of advantageous application of the invention may relate for example to the possibility in a shop window of a store to present the different colors, textures and accessories of a shoe or a range of shoes. Of course, it is understood here that this is an example among other possible examples of implementation.

The present invention will find other advantageous applications in other fields such as for example in the field of marketing for the design of a new product or packaging, or in the architectural field for presentation in front of a customer or a customer. jury of different architectural choices possible for the cladding of a facade of a building.

Prior art

We mainly distinguish two cases in the video mapping:

the 2D case, and

the 3D case.

In the case 2D, the geometry of the object to be increased is not necessarily known.

Projected images have been created or generated specifically to align properly with the contours, shapes, and terrain of the object.

For example, from a photo of a building, an artist creates a video animation that increases the building for a performance or performance.

This animation is then projected from a fixed point on the building (which itself remains fixed).

Examples of this technique are numerous and are widely illustrated, for example, in Donato Maniello's "Augmented Reality in Public Spaces" (The Thinker Printer, ISBN 978-88-95315-34-8).

It should be noted here that the 2D case can also be automated, for example by adding a camera to the system. The conjunction of the camera with the projection of particular and recognizable patterns then makes it possible to determine a 2D transformation that makes it possible to adapt the projected content to the shape by a geometric approximation (reference work for example "Virtual Display System Using Video Projector onto Real Object Surface »I Hirooka and Saito / ICAT 2004). In the 3D case, the geometry of the object to be increased is known.

In this case, the geometry of the object is used to deform the images to be projected.

Typically, a 3D rendering of the object is used to generate images as if they were seen by the video projector.

The state of the art of these techniques is well synthesized in "Spatial Augmented Reality" by Bimber and Raskar, ISBN 1-56881-230-2.

To be able to use a 3D rendering engine and generate images correctly aligned with a real 3D object, a number of parameters must be known:

- Projection matrix of the video projector (we also speak of intrinsic parameters). It is this matrix that is used to create a virtual camera and generate computer generated images.

The 3D shape of the object, necessary for the 3D engine to render in synthetic images.

- The position and orientation of the object in relation to the projector (we also speak of extrinsic parameters).

Generally, the intrinsic parameters of the video projector (or optical parameters) do not change during use (the lens, the zoom, the focal length, the shift are fixed) and, very frequently, the extrinsic parameters (position and orientation of the video projector compared to an object in the world reference) do not change either: the projector is fixed relative to the object to be increased.

We still meet some examples of video mapping on moving objects; in this case it is necessary to calibrate the system and to add to it a 3D positioning system of the object.

Various calibration procedures (determination of intrinsic and extrinsic parameters) exist; they are often based on the addition of a camera to the video mapping system and the calibration of a stereographic pair, conventional in computer vision.

Calibration techniques are disclosed, for example, in the international patent application PCT / FR2016 / 052756 belonging to the Applicant or in a publication of A UDET et al entitled "A user-friendly method to geometrically calibrated projector-camera System", IEEE Computer. Society Conference on Computer Vision and Pattern Recognition Workshop.

It will be noted here that the present invention does not relate to these calibration techniques. Both cases (2D and 3D) are conceivable in the context of the present invention.

It will be assumed that the video projector is broadcasting images adapted to the shape, position and orientation of the object (2D case) or that the video mapping system has been previously calibrated (3D case).

Consider the simple example of a marketing use of video mapping in which a stream of images is projected onto a product such as a shoe placed on the display of a shoe store; this store offers the customization of its shoes throughout its range.

The video mapping system is used here to show the customer the different possible appearances of his future purchase.

The flow of images projected on the shoe must allow the customer to visualize for the same shoe model all colors and possible accessories of the model (color of the shoe, laces, effects of material, textures, etc.).

For practical reasons, it is not possible to have a video mapping system for each shoe model or for each size.

In addition, the system must be easy to use for the seller.

It is therefore desirable to be able to remove the shoe from its display to place on it another model, and then to be able to replace the first shoe or another model if necessary.

It is therefore desirable in this example that the display unit fits all models on the one hand; and secondly, the shoe must be able to reposition itself correctly on the display without the seller being forced to calibrate again the video mapping system for each model in order to have a stream of images that is projected correctly on said shoe.

In general, regardless of the end use of the video mapping, it is desirable to be able to move or remove the desired object to increase its display. There are several reasons for this, including:

security reasons: the object to increase can be of value. It may therefore be necessary to remove it from the display rack to store it elsewhere (for example when closing the store). reasons of logistics or transport: the object to be increased can be cumbersome or fragile; it may therefore be necessary to remove it from the display to transport it separately from its display during a trip or an outside presentation meeting.

- maintenance reasons: if the object has to be damaged or dirty, it may be desirable to remove it and replace it, or simply repair it or clean it, reasons of versatility: it may be desirable to use the video mapping system for multiple objects.

In any case, it is very important to be able to easily reposition the object to be enlarged on the display unit strictly in the same position and the same orientation with respect to the projector if the flow of images is to be correctly projected. on said object.

We now understand that the ability to move or replace the object poses at least two issues that are the following and have never been resolved so far in the field of video mapping:

How to maintain the extrinsic parameters of the projection; that is, how to relocate the object to increase in the same way in relation to the video mapping system to maintain the accuracy of the projection?

How do you know which object has been placed on the display in order to broadcast the right flow of images adapted to the object and its geometric shape?

Some solutions are to use markers on the display to position the object.

This is not aesthetic and is not possible if the display is intended to support several objects to increase. The user must also demonstrate dexterity and precision to correctly position the object in relation to these marks.

The document KR 10-2015-0117505 discloses a display including a video mapping system equipped with a video projector and a platform capable of rotating on itself. In this document, several objects are jointly fixed on this platform.

Thus, when rotating the platform, a new object enters the projection field of the video projector. The system then comprises detection means capable of detecting the presence of this new object in the projection field. A signal is then transmitted to the system to project on said new object the stream of images corresponding to the detected object.

This document proposes a multi-object solution.

The Applicant observes, however, that this document KR 10-2015-0117505 does not propose a removability of the object making it possible to position the same object in a repeatable manner according to a single positioning and orientation.

Also known is document FR 13 54208 which discloses an interactive display with at least one video screen.

This document mainly discloses the recognition of an object for displaying on a screen of a video associated with the object.

In this document, it is thus intended to instrument the object of the RFID tag type identification means. By positioning the object on the display, it is detected by an RFID reader integrated in the display.

It is then planned in this document to query a database to retrieve according to the identified object the video stream corresponding to the object.

This stream is then broadcast on the screen so as to simultaneously view said object and the video stream associated with it.

The document FR 13 54208 focuses mainly on the detection and identification of the object positioned on the display stand.

The Applicant observes that this document is in no way interested in video mapping. There is nowhere mentioned in this document any problem with the proper positioning of the object on the display to properly project a flow of images on the object. The Applicant therefore considers that to date there is no solution to these various problems above in the field of video mapping.

Summary and object of the present invention

The present invention aims to improve the current situation described above.

The present invention aims more particularly to overcome the various drawbacks mentioned above by providing a video mapping system incorporating a mechanical support serving as a display and in particular to ensure the correct positioning of the object to increase compared to the projector. More particularly, the subject of the present invention relates to a video mapping system comprising:

a fixed projector capable of projecting at least one stream of images according to a determined projection field;

a mechanical support;

first assembly means configured to integrally assemble a fixed (removable) object on the mechanical support so that the object is positioned in the projection field of the video projector.

According to the present invention, the first assembly means are provided with a keying system guaranteeing a unique positioning and orientation of the object with respect to the video projector when it is assembled on the mechanical support.

Thus, thanks to this combination of technical means, characteristic of the present invention, and more particularly thanks to these assembly means equipped with a keying system, there is a video mapping system ensuring a unique positioning and orientation of the object to increase so as to maintain constant the extrinsic parameters of the projection so that the flow of images coincides perfectly with the contours, the shape and the relief of the object.

The presence of these polarizers allows the user to remove the object and reposition it at will repeatably being assured that the flow of images is always correctly projected on said object according to the contours, the shape and the relief of that -this.

In an alternative embodiment of the present invention, the first assembly means comprise:

a female or male mechanical imprint formed on the mechanical support, and - a mechanical male or female imprint formed on said object,

According to the present invention, the mechanical fingerprints male and female each have a geometry complementary to each other.

The choice of the geometry is arbitrary but must present a good fit to guarantee the position and not to present invariance by rotation (circle, regular polygons are to be avoided) to guarantee the locking in rotation.

Advantageously, the assembly of the object on the mechanical support is made by interlocking the mechanical fingerprints male and female between them. In another embodiment of the present invention, the first assembly means comprise at least one tapping formed on the mechanical support and a thread formed on the object to be increased.

In this variant, the threading and the tapping are able to cooperate together to securely fasten the object to the support by screwing.

The skilled person may consider other modes of assembly to ensure the integral connection between the object and the support.

Alternatively, the foolproof system may comprise a plurality of magnets having an alternating polarity to ensure the unique positioning and orientation of the object during assembly of the object on the support. In the same way, one or more magnets and / or ferromagnetic elements can guarantee the positioning and the orientation of the object with respect to the video projector.

The keying system makes it possible to have a video mapping system projecting a stream of images onto removable objects.

It then becomes possible to use the same system for several different projection objects.

In the 2D case mentioned in the preamble, the contents (flow of images) have all been created or aligned with the corresponding objects placed on the support: their alignment is repeatable and guaranteed.

In the 3D case, the intrinsic parameters are decomposed into: a transformation (denoted Tpi for projector-interface transformation) between the video projector 10 and the mechanical support 20 serving as mechanical interface, followed by a transformation (denoted Tio for transformation object interface) between the mechanical interface and the object.

To perform the 3D rendering and produce the synthesis images necessary for the projection, it is necessary to obtain Tpo {projector-object transformation).

We have :

Tpo = Tpi x Tio

In the example of a shoe shop, the projection system is installed and Tpi is constant.

Each shoe model is different and its Tio must be known. This is determined during the manufacture of the object (we then know the position of the mechanical interface since it is part of the object), or can be determined by performing a complete calibration of the system for each object.

In a second step, the object having been made removable, the system must now support several different objects.

A first behavior is to give the user any interaction device (keyboard, menu, pointer, voice command, gesture control) to indicate to the system that the object has changed.

In response to this command, the system generates and projects a new set of images: - either directly in the 2D case,

either indirectly using a new 3D model and its associated Tio in the 3D case).

For the record, one of the other objectives of the present invention is to ensure recognition of the object to be increased.

For this purpose, the video mapping system preferably comprises means for identifying the object; according to the invention, these identification means are configured to detect the object to increase and generate in case of detection of said object an electrical signal comprising information relating to the identity of the object.

According to the invention, the identification means are configured to communicate to the video projector the electrical signal so that the projector selects the flow of images to be projected according to the identified object.

In a first embodiment of the present invention, the identification means are optical identification means comprising:

a code positioned under the object and containing information relating to the identity of the object, and

an optical reader integrated on the support and whose reading head is positioned opposite the code when the object is assembled on the support to read the code.

Such a code can be a code of the barcode or matrix code type (QR code, AATAMATROX code).

One can also consider OCR type recognition means for reading an identifier positioned directly under the object. In a second embodiment of the present invention, the identification means are electromagnetic identification means comprising:

a radiofrequency tag containing information relating to the identity of the object, and

a radiofrequency tag reader integrated in the medium and able to read the information relating to the identity of the object when the reader is close to the label (that is to say when said label enters the magnetic field of the reader). Through the use of short-distance wireless communication technology of the RFID type, the system can read a tag tag or communicate directly with the object to know its identifier.

Alternatively, we can consider a technology of the NFC type.

In a third embodiment of the present invention, the identification means are electromechanical identification means comprising electrical contacts operable by the object when it is fixed on the support.

For example, we can provide:

push buttons which are positioned on said support so as to be depressed during the positioning and assembly of the object on the support, or electrical contacts open or closed depending on the assembly or not of the object on the support.

In a fourth embodiment of the present invention, the identification means are electronic identification means comprising communication means configured to establish communication with an electronic chip positioned on said object and comprising information relating to the identity. said object.

Advantageously, the communication means are configured to convey said at least one information relating to the identity of said object to said projector.

According to one variant, the communication means are of the wireless type. For example, it will be possible to use communication means using a wireless communication protocol of the Wifi, Bluetooth, Zigbee, and so on type.

According to another variant, the communication means are of the wired type. For example, in the context of a wire communication, the mechanical interface can establish electrical contacts (serial line, I2C bus or other) which allows a digital communication with a memory (for example an electronic chip) in the object, giving his identifier.

Advantageously, the video mapping system comprises second assembly means configured to integrally assemble the video projector to the mechanical support.

Having the projector directly attached to the support allows for an autonomous system that can be positioned anywhere. It is not necessary to (re) calibrate the projector during each movement of the system.

Thus, the object of the present invention, by its various functional and structural aspects described above, ensures a unique positioning and orientation of the object to be increased compared to the projector, which ensures a correct projection of the image flow according to the geometry of said object.

Brief description of the attached figures

Other characteristics and advantages of the present invention will emerge from the description below, with reference to FIGS. 1 to 4, which illustrate two non-limitative embodiments thereof and in which:

- Figures 1 and 2 each show schematically a video mapping system according to an embodiment of the present invention;

Figures 3 and 4 each schematically show a video mapping system according to another embodiment of the present invention. Detailed description according to various advantageous exemplary embodiments

A video mapping system will now be described in the following with reference to Figures 1 to 4.

In a conventional manner, the video mapping system 100 described here and illustrated in FIGS. 1 to 4 comprises a projector 10 capable of projecting a stream of images according to a determined CP projection field.

The objective here is to project this stream of images onto an object O such as for example a house model (Figures 1 and 2) or a shoe (Figures 3 and 4). The application of the invention illustrated in FIGS. 1 and 2 corresponds, for example, to a situation in which an architect uses the video mapping system 100 to present to a jury or his client the various possible claddings of a facade of a building represented by a model O.

The application of the invention illustrated in FIGS. 3 and 4 corresponds to another situation in which the seller of a shoe store uses the video mapping system 100 to present to his client (in the window or on a display stand) the different possible personalizations of a shoe model O.

Of course, it will be understood here that these are two examples of application among others.

In its simplest version, there is a static video mapping in which the images to be projected are processed beforehand in order to be projected.

The projector is here precalibrated.

In this case, the video projector 10 must have a position and orientation that are fixed and unique with respect to the object O so that the images to be projected coincide perfectly with the object O to be increased.

We understand here that the video mapping is for single use; if the video projector 10 and / or the object O are moved, the images must be processed again so that the video projector 10 projects the images correctly onto the object O.

In case of relative displacement of the object O with respect to the projector 10, it is necessary to recalibrate the system 100.

The extrinsic parameters of the projection must therefore remain constant here. To remedy this, the video mapping system 100 may resort to the use of a video projector 10 coupled to a camera (not shown here); this camera is able to detect the object O on which the flow of images must be projected so as to make this flow of images coincide with the contours, the shape and the relief of the object O.

This more complex approach requires the use of calibration software to make the virtual space coincide with the real environment. The principle of this calibration is to map a two or three dimensional object into a virtual space that mimics the real environment.

In this way, the central unit of the system 100 knows precisely the locations of the object O where the various information relating to the object to be increased must be projected. With this mapping, the software can interact with the video projector 10 to transform the image flow that is to be projected onto the surface of the object O.

Such a calibration system, described for example in the international patent application PCT / FR2016 / 052756, makes it possible to project a stream of images onto an object O in motion relative to the video projector 10.

It will be noted here that the present invention makes it possible to fit into both configuration logic: either the video projector 10 is precalibrated, or it is necessary to calibrate the video projector 10 when the O object is positioned for the first time. the video mapping system 100.

In one case as in the other, it is preferable in the context of the present invention that the position and the orientation of the object O remain the same if one does not want to (re) calibrate the system 100 at each new use. In the example described here, it is considered that the video projector 10 is precalibrated.

It is therefore necessary that the object O to be increased is positioned relative to said projector 10 in a single predetermined position and a single orientation and coherent with respect to the image stream to be projected. To remedy this problem related to the position and orientation of the object O with respect to the video projector 10, the video mapping system 100 according to the present invention provides for the integration of a mechanical support 20 serving as a display.

In the two examples described here and illustrated in FIGS. 1 and 2, there is provided on this support 20 assembly means 30, said first assembly means, configured to ensure a solid connection between:

the object to increase O, here for example the house model (Figures 1 and 2) or the shoe (Figures 3 and 4), and

the mechanical support 20.

In these examples, second assembling means 60 configured to integrally assemble the video projector 10 to the mechanical support 20 are also provided so that the video projector 10 remains fixed and is oriented in a determined direction in order to project the flow. of images according to a determined CP projection field. For example, it is possible for these second assembly means 60 to comprise a screw / nut system to ensure the mechanical connection between the support 20 and the video projector 10. Of course, other examples for the assembly of the video projector 10 on the support 20 may be envisaged by those skilled in the art.

The orientation of the video projector 10 can be achieved by a system of reference or keying ensuring that the video projector 10 is correctly oriented.

Alternatively, it may also be provided that the video projector 10 is directly integrated in the support 20 in a housing which is intended for it and which is configured to ensure a positioning of the video projector 20 in a position and a single orientation.

10

In these two examples illustrated in FIGS. 1 to 4, the first assembly means 30 are in turn configured with respect to the video projector 10 so that the object to be increased O is positioned in the projection field CP of the video projector 10 .

To guarantee a unique positioning and orientation of the object O when it is assembled on the mechanical support 20, provision is made to provide the first assembly means 30 with a coding system 40.

The keying system 40 is characteristic of the present invention.

In the example described here in FIGS. 1 and 2, the mechanical support 20 thus has two cylinders of different diameters 41 and the object to be increased O, here an architectural model, presents the negative 42 of these two. cylinders 41, here two cylindrical holes 42 of complementary shape to the two cylinders 41.

In this way, there is only one way to position the model O on the support

20 by fitting the two cylinders 41 of the support 20 in the two cylindrical holes 42 positioned under the model O.

In this example, each time we reposition the model O on the system 100, it will always be placed in the same position and in the same orientation relative to the projector 10.

30 The architect on the move during a meeting presenting his project will be able to transport the model (s) O separately from the video projector 10.

During the presentation, he will not have to worry about the calibration of his projector 10 during his presentation or presentation: it will be sufficient to position his or her models O on the support 20 according to the position of the cylinders 41 and cylindrical holes without worrying about the positioning or the orientation of that (s) -ci.

Thanks to these polarizers 41 and 42, the extrinsic parameters of the projection are constant: the model O will be positioned according to the desired position and orientation, thus allowing the projected image flow on the object to coincide perfectly with the contours, the shape and the relief of the model.

In the example described here in FIGS. 3 and 4, the first assembly means 30 present on the support 20 a female mechanical impression 41 having an irregular polygonal shape complementary to that of a male mechanical impression 42 formed under the shoe O .

In this example, the female mechanical fingerprints 41 and male 42 allow an interlocking assembly of the shoe O on the support 20.

This assembly, thanks to the keying system 40, ensures a unique positioning and orientation of the shoe O relative to the support 20 and therefore relative to the video projector which is fixed to it relative to the support.

The seller can then remove and replace the support 20 shoe O without worrying about the proper positioning thereof. He can reposition another shoe and so on so that the shoe O on the display is always positioned and oriented in the same way relative to the video projector.

These are two examples of realization among others conceivable.

Other examples of implementation may be considered in the context of the present invention to provide the keying function.

For example, one skilled in the art can provide in the assembly means 30 to position a set of magnets whose polarity is alternated to constrain the user has positioned the object O in a single position and a single orientation. In the same way, an arrangement of one or more magnets and ferromagnetic elements can guarantee positioning and orientation.

According to a first aspect of the invention, the video mapping system thus comprises a mechanical assembly system of a projection object O. The system proposed in the context of the present invention thus makes it possible to unhook the object of the system then to replace it exactly in the same place. As described above, several implementations to provide the keying function are envisaged within the scope of the present invention:

by interlocking assembly elements having irregular geometric shapes: a positive of the shape on the object O fits into a negative of the support 5 - by screwing,

by aligning magnets with alternating polarity.

By aligning one or more magnets with one or more ferromagnetic metal parts

According to a second aspect of the invention, it is desirable to automatically recognize the object O on the support 20.

Thus, in the example described in FIGS. 3 and 4, the video mapping system 100 includes means 50 for identifying the object O making it possible to detect the object O.

Preferably, in case of detection of the object O, the generation by the means 50 of an electrical signal comprising information relating to the identity of said object O is provided.

Thus, in this example, the seller positions on the support 20 the shoe of the model X. When positioning it on the support 20, the identification means 50 will generate an electrical signal comprising information relating to the identity of the X model.

If the seller replaces this model X with a model Y, the identification means 50 will generate a new electrical signal comprising information relating to the identity of the model Y.

It is understood here that the identification means 50 are configured to communicate to the video projector 10 said electrical signal.

Thus, the video projector 10 can project the flow of images to be projected according to the shoe model O exposed: the model X or the model Y.

The video projector 10 comprises for this purpose a database (not shown here) comprising a plurality of image streams each associated with an object to be increased (for example: the whole of the shoe collection of a shop); this database is connected to selection means (not shown here) configured to select the image stream according to the received electrical signal.

To carry out this identification, it is provided in the example described here that the identification means 50 are of the electromagnetic type and comprise: a radio frequency tag 52 positioned on the shoe O (inside the sole, for example) and containing information relating to the model of the shoe O, and

a radio frequency tag reader 51 integrated in the support 20 and able to read the information relating to the model in question when the reader 51 is close to the label 52. It is understood here that the reading is possible when the object O is placed in the magnetic field produced by the reader 51, which is the case when the shoe O is assembled on the support 20. When the shoe O is secured to the support 20, the reader 51 will read the information contained on the label 51 and transmit them as an electrical signal to the video projector 10.

On receiving this signal, the video projector 10 then selects from a dedicated database the image flow corresponding to the model on the support 20.

The example described here incorporates RFID technology for model identification.

Those skilled in the art may consider other techniques to allow the identification of model O, for example identification by mechanical or electrical contact or by electrical, radio or optical means.

Thus, the present invention proposes a video mapping system ensuring a simple use by avoiding calibration operations that can prove to be complex or even prohibitive for a novice.

The salesman in a shop will be able to position at will and in a repeatable way as many models of shoe as he wishes to present to his customer the different models and the different personalizations possible of his range.

The architect will be able to make the presentation of these different models and skins without worrying about the good positioning of these models.

In fact, whatever the use made here of the present invention, the decapping means arranged on the display stand ensure the correct positioning and the good orientation of the object on the display stand so as to keep constant the extrinsic parameters of the display. projection so that the projected image flow coincides perfectly with the contours, the shape and the relief of the object. It should be observed that this detailed description relates to a particular embodiment of the present invention, but in no case this description is of any nature limiting to the subject of the invention; on the contrary, its purpose is to remove any imprecision or misinterpretation of the claims that follow.

It should also be observed that the reference signs in parentheses in the following claims are in no way limiting in nature; these signs are only intended to improve the intelligibility and understanding of the claims that follow as well as the scope of the protection sought.

Claims

A video mapping system (100) comprising:

a fixed projector (10) able to project at least one stream of images according to a determined projection field (CP);

a mechanical support (20);

first assembly means (30) configured to integrally assemble a determined removable object (O) on said mechanical support (20) so that said object (O) is positioned in the projection field (CP) of said projector ( 10)

in which the first assembly means (30) are provided with a coding system (40) guaranteeing a unique positioning and orientation of the object (O) with respect to the video projector when it is assembled on said mechanical support (20) so as to keep the extrinsic parameters of the projection constant so that the flow of images coincides perfectly with the contours, the shape and the relief of the object.

The system (100) of claim 1, wherein the foolproof system (40) comprises:

a female or male mechanical impression (41) formed on said mechanical support (20), and

a mechanical fingerprint (42) male or female formed on said object (O), said mechanical impressions (41, 42) male and female each having a geometry complementary to each other.

3. System (100) according to claim 1, wherein the first assembly means (30) comprise at least one tapping provided on said mechanical support (20) and a thread provided on said object (O), said threading and said tapping being able to cooperate together to integrally assemble said object (O) on said support (20) by screwing.

4. System (100) according to any one of the preceding claims, wherein the coding system (40) comprises one or more magnets having an alternating polarity or whose alignment with one or more ferromagnetic elements guarantees the unique positioning and orientation of the object (O) during assembly of said object (O) on said support (20).

5. System (100) according to any one of the preceding claims, which comprises identification means (50) of said object (O) configured to detect said object (O) and generate in case of detection of said object (O) a electrical signal comprising information relating to the identity of said object (O).

The system (100) of claim 5, wherein said identification means (50) is configured to communicate to said projector (10) said electrical signal and wherein the projector (10) is configured to select said stream of images. projecting on said object (O) as a function of said electrical signal.

The system (100) of claim 5 or 6, wherein the identification means (50) is an optical identification means comprising:

a code positioned under said object (O) and containing at least one information relating to the identity of said object, and

an optical reader integrated on said support (20) and positioned opposite said code when said object (O) is assembled on said support (20) in order to read said code.

System (100) according to claim 5 or 6, wherein the identification means (50) are electromagnetic identification means (51, 52) comprising:

a radio frequency tag (52) positioned on said object (O) and containing at least one information relating to the identity of said object (O), and

a radio frequency tag reader (51) integrated in said medium (20) and able to read said at least one information relating to the identity of said object (O) when said reader (51) is in proximity to said tag ( 52).

9. System (100) according to claim 5 or 6, wherein the identification means (50) are electronic identification means comprising an electronic chip positioned on said object (O) and comprising at least one information relating to the identity of said object (O) and communication means configured to convey said least information relating to the identity of said object (O) to said projector (10).

10. System (100) according to any one of claims 5 or 6, wherein the identification means (50) are electromechanical means having electrical contacts actuated by said object (O) when it is fixed on said support (20).