ES2300204B1 - SYSTEM AND METHOD FOR THE DISPLAY OF AN INCREASED IMAGE APPLYING INCREASED REALITY TECHNIQUES. - Google Patents

Abstract

System and method for displaying a augmented image applying augmented reality techniques.

Interactive display system (1) based in Augmented Reality technologies for tourism applications and leisure, which allows a user (13) to contemplate a real image (6) augmented with some interesting information. The system (1) includes a real camera (2), a processing unit (3), a database (4), a display device (8) and a system Tracking (9). The processing unit (3) converts three-dimensional graphic objects (5) stored in the base of data (4) in two-dimensional virtual representations (5 ') in function of the position of the real camera (2) calculated by the tracking system (9); then align the two-dimensional virtual representations (5 ') and the real image (6), generating the enlarged image (6 '). The system (1) allows zoom in on the enlarged image (6 '), zooming in simultaneous and adjusted on the real image (6) and the two-dimensional virtual representations (5 ').

Description

System and method for displaying a augmented image applying augmented reality techniques.

Technical sector

This invention relates to a method and a system for viewing an enlarged scene, which allows increase with real content a real scene or image that It is within a user's point of view. The invention It is mainly oriented to devices for the tourism sector and leisure type binoculars for the observation of a view, although it is also designed for other environments such as cultural institutions, fairs or nature tourism.

State of the art

From the annals of modern science, the Visual observation has preceded knowledge. The observation visual, contemplation and knowledge meet intimately linked in western society. Can even affirm that modern society is a society based on what visual. The sense of sight has always been the dominant sense and the one who has played a leading role in the communication between people.

The concept of binoculars placed on a hill for tourists to observe the surrounding area for a few minutes when entering a coin is very generalized These binoculars offer a panoramic view of the buildings and streets of an urban area, its natural resources and cultural. Additionally, in some cases, they allow you to zoom about certain tourist attractions to see them more nearby. This view can arouse in tourists the interest of visit these attractions later, helping them in the identification of new points of interest for later visit.

However, it is often complex find something in the field of vision of binoculars other than the nearby forests or the sky itself. Even when it has found a tourist attraction that can be interesting, many times that interest is lost due to the lack of images and information about said attraction. People are used to receive information in a simple and entertaining way through from different channels such as Internet or television, using hyperlinks ("hyperlinks") to get content multimedia that respond to your request.

Most tourists learn about the world through different processes, which include features such as representation, imagination and observation. Every time more, visual technologies (photographs, cinema, video, television, digital images, etc.) are part of the everyday experience of many people and they also have a direct influence on the way people experience The new environments. These "visions" or socially generated "interpretations" that shape the world and their heritage in visual terms not only bring new research challenges, but generate numerous opportunities for critically examine the role and function of tourism as a vehicle in the communication of observation, being and knowledge.

Additionally, it can be said that there is a large amount of information in digital format, such as content audiovisual, electronic texts, multimedia applications or geographic information systems. Until today, this information has been used in a timely manner in electronic guides, remaining inaccessible to the visitor. In addition, the existing multimedia presentations are physically found away from real environments, which implies that the tourist must leave the tourist attraction for information additional.

If tourism organizations want to access to a larger audience, they must design multimedia content Interesting enough to attract tourists. By this requires new systems that allow these innovative applications and provide valuable content added.

Brief Description of the Invention

The present invention meets the needs previously mentioned by a system and a method for viewing an enlarged image with multimedia content additional. For this, the invention detects the position of a display device included in the system, increases the User view with graphic representations of graphic objects recovered from a database and allows the interaction of user with multimedia information provided.

Another aspect of the invention provides a system and a method to zoom on the enlarged image, detecting the position of the display device and setting the relative position of graphic objects when zooming on sight

Brief description of the figures

The details of the invention can be seen in the accompanying figures, not pretending to be limiting of scope of the invention:

- Figure 1 shows a system according to an embodiment of the invention.

- Figure 2 shows the functional scheme of the invention.

- Figure 3 shows the operation of the system by an example of use of the invention.

- Figure 4 shows the preferred method of according to the invention.

- Figure 5 shows an example of the method of The invention to zoom.

Detailed description of the invention

In this document, the Augmented Reality (RA) technologies such as those technologies that increase a real scenario by adding information virtual, while an environment consisting primarily of augmented virtual information with some real objects is known as Augmented Virtuality (VA). In other words, the technologies RA can generate an augmented environment by adding certain  virtual information about a completely real initial environment.

The invention is based on the application of Augmented Reality (RA) technologies to the traditional concept of binoculars in tourist environments, that is, the invention is refers to a system that allows users to see a scene (for example, the view from a nearby hill) augmented by the virtual information overlay relative to the scene that The user is observing using RA technologies. He Increasing the scene increases the user's entertainment experience, since virtual information provides additional content to the scene (for example, the arrows pointing to buildings and show your name) The system also allows the user interact with virtual information and get content additional (for example, access to text files, images or videos related to a specific tourist resource). He system allows you to customize the contents based on Different user profiles.

Figure 1 shows a typical system (1) of according to an embodiment of the invention. The system (1) It basically comprises a real camera (2) that records an image real (6) or real-time image from the point of view of user (13), and that sends this real image (6) to a unit of processing (3). The processing unit (3) includes a base of data (4) that stores three-dimensional graphic objects (5) -no represented - which will be superimposed on the real image (6) using RA methods. RA methods convert graphic objects three-dimensional (5) in two-dimensional virtual representations (5 '), and then the representations overlap two-dimensional virtual (5 ') of said graphic objects three-dimensional (5) to the real image (6), forming the image increased (6 '). Three-dimensional graphic objects (5) can include additional multimedia information (7) -not represented- able to provide additional and more complex information about three-dimensional graphic objects (5).

The system (1) also includes a device for visualization (8) by which the user (13) can observe the enlarged image (6 '), that is, the real image (6) to which they have added the two-dimensional virtual representations (5 ') of three-dimensional graphic objects (5). The system (1) includes a tracking system (9) to detect the position current display device (8) as an item fundamental within the process of increase. As shown in Figure 1, the display device (8) and the real camera (2) are preferably mounted on the same axis mechanic so that they move in solidarity. In this way, the tracking system (9) calculates the position of the device display (8) and therefore the position of the real camera (2).

Additionally, speakers (10) are included so that the user (13) can listen to the presentations or other content in the form of audio included within the content additional multimedia (7). The system (1) also includes means of interaction (11) that fulfill the user interface function for the system (1). Finally, the system (1) can include a system of payment (12) based on the insertion of coins or other means of payment.

The real camera (2) can be any type of camera that includes "autofocus" lenses for optical zoom, from so that the user (13) can increase or decrease the zoom to observe small or distant objects more clearly. The camera real (2) must be able to be controlled from a control device external capable of accessing and modifying the zoom and other settings or camera control parameters, for example, by means of a RS-232C serial cable connection. exist large number of cameras of this type available commercially

The tracking system (9) is based preferably in inertial sensors. However, there is a great number of alternative positioning systems that can be used effectively in other embodiments. Since it is assumes that the system (1) is going to be used mainly in two directions (right / left, up / down), the techniques of Simpler tracking provide sufficient accuracy. Without However, the invention can use any system of tracking that is able to determine the position of the device display (8) robustly and send coordinates to the processing unit (3).

The display device (8) by means of the that the user (13) perceives the enlarged image (6 ') that includes the real image (6) and two-dimensional virtual representations (5 ') of the three-dimensional graphic objects (5) together with the additional multimedia content (7), is preferably a metaphor of conventional binoculars. Display device (8) preferably comprises a display that is basically a non-transparent video display system, which can be non-stereoscopic, stereoscopic and autostereoscopic. The display device (8) can be one of the binoculars or virtual telescopes available in the market with stereoscopic capacity. In future modes of embodiment of the invention, devices may be used semi-transparent and autostereoscopic for display the enlarged image (6 ').

Regarding the means of interaction (11), the preferred embodiment of the invention includes seven buttons to interact with the system (1) in one way Simple and ergonomic. As Figure 1 shows, the buttons (11) have been distributed between the left side (19) and the side right (20) of the system (1). On the left side (19) of the system (1) there are two buttons that allow you to interact with the image increased (6 '). The user (13) can zoom to increase the image with one of the buttons and zoom to reduce it with the other. On the right side (20) of the system (1) there are five buttons: a central button (preferably one color) and four buttons to its around (preferably a different color than the central button). The middle button is the "enter" button, which is used to click on the two-dimensional virtual representations (5 ') of three-dimensional graphic objects (5) and also to choose from between menus of additional multimedia content (7). The buttons that surround it serve to move through the menus that allow the selection of additional multimedia content (7).

The system (1) preferably includes two bases of different data (4): a database for augmentation and a database of self-administered contents. The database for magnification includes three-dimensional graphic objects (5) associated with points of interest for the user (13), including the name of the main tourist attractions and other objects graphics. The self-administered content database store additional multimedia content (7), including videos, movie clips, interactive 3D panoramas or even models three-dimensional existing tourist attractions and not existing.

The preferred embodiment of the invention also includes an authoring tool to simplify the manipulation of three-dimensional graphic objects (5), their position in the enlarged image (6 ') and multimedia content additional (7) that they can show. The program can work with XML files to change or create new ones suitable for the main program The preferred embodiment of the invention includes up to ten points of interest with a maximum of Five subobjects to choose from within the menu. These objects three-dimensional graphics (5) include points of interest tourist and its corresponding markers in the enlarged image (6 '), while sub-objects represent different types of additional multimedia content (7) displayed when choosing two-dimensional virtual representations (5 ') of objects three-dimensional graphics (5).

Figure 2 shows a functional scheme of the system (1) of Figure 1. As explained, the camera real (2) captures the user's point of view (13), that is, record a real-time video image called an image real (6). The tracking system (9) calculates and sends a position information (14) to the processing unit (3), informing about the current location and orientation of the display device (8). The processing unit (3) then performs a graphics adaptation process (15), which convert the three-dimensional graphic objects (5) stored in the two-dimensional virtual representations (5 ') depending on an orientation vector that is obtained from the information position (14). That is, the processing unit (3) adapts a view of three-dimensional graphic objects (5) to obtain a virtual scene, controlling a "virtual camera" that use the same orientation vector as the real camera (2), it is say, orienting the virtual camera exactly like the camera real (2). Therefore, the real scene (6) and the representations two-dimensional virtual (5 ') of graphic objects Three-dimensional (5) are synchronized according to the real world. This synchronization allows composing the real and virtual scenes of the enlarged image (6 ').

Then the processing unit (3) performs an augmentation process (16) in which the actual scene (6) is increases with the two-dimensional virtual representations (5 ') of three-dimensional graphic objects (5) to obtain the image augmented (6 '), which is sent back to the device visualization (8). When the user (13) looks through the display device (8), you can see the enlarged image (6 '). If the user (13) turns the system (1) or performs any movement that changes the position of the display device (8), the tracking system (9) reports the change to the unit processing (3). The graphics adaptation process (15) then update the two-dimensional virtual representations (5 ') of the three-dimensional graphic objects (5), so that match the new real image (6). Therefore, when the user (13) turn the system (1) or change its position, the enlarged image (6 ') changes in its entirety, that is, the real image (6) and the two-dimensional virtual representations (5 ') fit that change.

Figure 3 shows the operation of the invention using an example of use of the system (1). The graphic from the top shows an example of an enlarged image (6 ') displayed by the user (13). This enlarged image (6 ') It is composed of the real image (6) of a town (17) and some mountains (18), in which one of the buildings and one are indicated  of the mountains through the corresponding representations two-dimensional virtual (5 '). When the user (13) discovers a interesting object on which you want to gather more information -by example, the high-rise building in the center of the screen indicated with the text "obj1" -, acts with the means of interaction (11) until selecting the virtual representation two-dimensional (5 ') of said interesting object. Then the system (1) displays the additional multimedia content (7) related to said two-dimensional virtual representation (5 '). For example, as shown in Figure 3, the system (1) can display a screen where some text is displayed interesting and a video of a person explaining certain characteristics of the building, and / or offers new options for navigation. The system (1) can also offer information customized, so that the different contents can show to different user profiles, including aspects like multilingualism For example, an English-speaking tourist who Having a cultural profile can be a type of user profile. This user will receive more complete additional information in English about the history of the selected building that information received by other profiles.

Figure 4 shows the method according to the invention whereby three-dimensional graphic objects (5) are placed in the virtual world using a spherical environment. The registration information (24) that determines the placement of the three-dimensional graphic objects (5) in the enlarged image (6 ') It is defined using the authoring tool. The unit of processing (3) receives the registration information (24) of the different three-dimensional graphic objects (5) and information position (14) of the display device (8), to be able to carry out the process of adapting the graphics (15). Be build a virtual world (21), that is, a three-dimensional model in which three-dimensional graphic objects (5) are placed in its previously defined spatial position. In this virtual world (21), a virtual camera (22) is placed with respect to the objects three-dimensional graphics (5) based on the information in position (14) of the real camera (2). In other words, the objects three-dimensional graphics (5) are placed in virtual points that simulate the distance of real objects from the point of user view (13).

The graphics adaptation process (15) of the three-dimensional virtual objects (5) in representations Two-dimensional virtual (5 ') is based on information about the angle that three-dimensional graphic objects (5) differ with respect to a reference value Zero-View-Vector, which represents the central point of a coordinate system. Then the process graphics adaptation (15) convert graphic objects three-dimensional (5) in their respective virtual representations two-dimensional (5 '). The result is the placement and adaptation of the two-dimensional virtual representations (5 ') so that provide a feeling of depth to the user (13).

Next, the augmentation process (16) combines the two-dimensional virtual representations (5 ') with the image real (6) recorded by the real camera (2) to get the image increased (6 '). When looking at this enlarged image (6 '), the user (13) you can enjoy the landscape and the information provided by two-dimensional virtual representations (5 '). This Information is useful (as it contains the names of attractions tourist and any other interesting information) and clear (since It is presented in perspective, simulating the objects in the environment).

The process of transformation of the coordinates Spatial defined by three-dimensional graphic objects (5) in a real environment in two-dimensional coordinates that define the pixels that are displayed on a display device (8) is a key element in the present invention. As it has been explained previously, this process is done by applying a innovative approach, building a "virtual world" and capturing an image of said "virtual world" of it way in which the real camera (2) records the real image (6). TO then the enlarged image (6 ') superimposes the real world and the virtual world to achieve the effect of increasing, bringing together  both worlds in a new "augmented world".

Additionally, and as shown in Figure 4, the invention allows zooming in on the enlarged image (6 '). When zooming, the two-dimensional virtual representations (5 ') not only do they rescale, but they also reposition themselves, so that they continue to be placed on the objects that increase. This wants say that by zooming in, the invention guarantees that the points of view of the real camera (2) and the virtual camera (22) are adjusted in every moment.

The user (13) activates the zoom process interacting with the two buttons that are on the side left (19) of the system (1). The buttons are connected to the processing unit (3), so that when the user (13) act on them, the processing unit (3) modifies the zoom from the virtual camera (22) and send a command to the real camera (2) to change its zoom control parameters so synchronized

The adjustment of the control parameters of the real camera (2) and virtual camera (22) must be done real-time dynamics, while the system is working (1), to correctly align the real image (6) and the two-dimensional virtual representations (5 '). Due to system real camera zoom mechanic (2), there is a delay between the setting the zoom value of the virtual camera (22) and the mechanical update of the real camera zoom (2). This delay in the change between two zoom positions is perceived by the user (13). Another mechanical limitation of the real camera system (2) is that the zoom speed of said real camera (2) is not linear, due to the acceleration and deceleration processes at Start and end.

Theoretically, it would be necessary to have a connection and continuous data exchange between the camera virtual (22) and the real camera (2) so that there was a correspondence between the parameters of both cameras in any instant of time. However, in practice, it is not possible achieve continuous data exchange due to mechanical limitations of the real camera (2). In addition, there is a time delay since the processing unit (3) sends a command to know the status of the real camera (2) and until the real camera (2) returns its status to the processing unit (3). This delay is increased due to the low speed of update of the values of the zoom parameters of the real camera (2).

The invention proposes a method for updating and adjust the zoom values of the real (2) and virtual cameras (22), an example of which is shown in Figure 5, so that both values are coincident in all moments of time at despite mechanical limitations and camera delays real (2). In Figure 5, the initial angle of view of both Real (2) and virtual (22) cameras are set at a value of 48º. From according to the preferred embodiment of the invention, when the user (13) interacts with one of the buttons on the side left (19) of the system (1) to zoom by increasing the image, the virtual camera (22) and the real camera (2) begin to zoom in As previously mentioned, there are some delays in the real camera (2) to follow the zoom process, is that is, the real camera (2) zooms slower than the virtual camera (22). To synchronize the zoom value of the real camera (2) with instant camera zoom value virtual (22), the processing unit (3) receives a command from setting (25) of the virtual camera (22) indicating its instantaneous value Zoom The processing unit (3) then fixes the zoom of the real camera (2) with the zoom value of the virtual camera (22). However, if the user (13) continues to zoom, the value of the virtual camera zoom (22) keeps changing. Therefore, this process is repeated until the user (13) stops the zoom (until a time t elapses according to Figure 5). In others words, the adjustment between the zooms of the real camera (2) and the Virtual camera (22) is performed in an iterative discrete manner, of so that the relatively slower real camera (2) follows the zoom Virtual camera snapshot (22).

It should be mentioned that the real camera zoom (2) you can usually only adopt a set of discrete values Due to its mechanical configuration. As shown in the Figure 5, when the processing unit (3) receives information of the specific value of the virtual camera zoom (22), by example, 45º, the processing unit (3) tries to fix the zoom of the real camera (2) in the value of 45º. However, the zoom of the real camera (2) reaches this specific value with an error "e" (positive or negative). Because of this error, at the end of process, the processing unit (3) must read the final value of the  real camera zoom (2), which will be slightly different from the value end of the virtual camera zoom (22) due to the "in" error. Next, the processing unit (3) sends a command of tuning (26) to the virtual camera (22), so that the value end of the virtual camera (22) is updated with the final value of the real camera zoom (2).

The zoom control parameter of some Real cameras (2) used in practice are encoded in hexadecimal format. Therefore, when the processing unit (3) receive an adjustment command (25) from the virtual camera (22) indicating the current value of the virtual camera zoom (22), the processing unit (3) transforms this value into a code hexadecimal before sending it to the real camera (2) and vice versa.

The specifications of the real cameras (2) existing in the market usually include a table that relates a set of view angles with corresponding values Hexadecimal control parameters. For example, in the mode of preferred embodiment, the hexadecimal values of the Zoom control parameters range from 0 to 4000, representing Viewing angles between 4.8º (maximum zoom) and 48º (without any kind of zoom). This means that the values of the angles of view for these specific hexadecimal values. However, the most of the hexadecimal values and their angles corresponding are not included in the table. In order to calculate any hexadecimal code for any angle of view and vice versa, the invention proposes the use of algorithms of interpolation based on camera specification table real (2). For example, for the real camera (2) of the mode preferred embodiment of the invention, the following are proposed interpolation equations:

y = -0.2274x3 + 22.593x2 - 949.94x + 18690,

where and is the parameter value zoom control in hexadecimal and x is the current angle of view of the real camera (2). When you receive an adjustment command (25) that includes the angle of view of the virtual camera (22), the unit of processing (3) use this equation to calculate the code corresponding hexadecimal that is sent to the real camera (2).

x = -2.87 * 10 12 and 3 + 1.99 * 10 7 and 2 * -0.00525077y + 48,

where x is the angle of view of the real camera (2) e y is the hexadecimal value of the parameter of zoom control After reading the value of the control parameter of the zoom of the real camera (2) in hexadecimal format, the unit of processing (3) uses this equation to calculate the angle of corresponding view that will be sent to the virtual camera (22) as tuning command (26).

As previously explained, the invention applies to the cultural tourism sector, which is one of the key future areas for the creation and consolidation of cultural industries Augmented Reality techniques proposals to access and understand tourist content and cultural are highly visual forms of presentation and interactive Therefore, these technological approaches are a added value, which allows visitors to experience the history associated with a real environment in a personalized way.

As a first example of application of the invention, the reader can imagine the view of a city from a nearby hill. The invention is placed at the top of the hill to allow a "visit" to some of the tourist attractions and elements of the environment, and to receive information about each of these attractions. For example, you can choose a cathedral or an island in the middle of the bay to receive multimedia information
additional.

However, the embodiments of the invention are not limited to tourist environments, but are can extend to a wide variety of playful experiences and cultural. Similar scenarios can be described in situations such as cultural institutions, exhibition halls, tourism nature, fairs or any other scenario in which they appear objects and resources that can be augmented by Graphics by Computer or additional multimedia content.

As a second example, the application of the invention for cultural art pieces and artistic, monuments and unique pieces. The use of techniques current restoration as infrared rays are being generalizing among cultural institutions. So, it has found information hidden behind the first layer of the picture. The visitor of a museum can use the invention in front of a box to get additional invisible information and interact with the different parts of the canvas. The museums and the cultural institutions can define a price for the content shown using the invention.

A third example may be the increase in Objects shown at trade shows. Machine tool is usually shown in large fairs. One of the main problems of manufacturers is that they can't show All the functionalities of the machines at the fair. The invention can provide more information about the components and the real operation of the machines.

In a final example of the invention, the reader You can consider the case of hikers who want to meet more data on landscapes, flora and fauna while They walk through the rural environment. The invention can provide additional information at the top of the mountains, such as the name of the different peaks of the environment, the way of access or diversity  in fauna and flora.

Although this invention has been presented and described in relation to their preferred embodiments, it is clear that some changes and modifications will be made additional to those previously mentioned about the characteristics Basic of the invention. Additionally, there is great diversity of types of software and hardware that can be used when materialize the invention, and the invention is not limited to previously described examples. Therefore, applicants protect all variations and modifications within the scope of Application of the present invention. The invention is defined. by the following claims, including all equivalent.

Claims (14)

1. System (1) for displaying an enlarged image (6 ') comprising a real image (6) or image in the field of view of a user (13) augmented with certain interesting contents, characterized in that it comprises:

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a real camera (2) to record the real image (6) from the point of user view (13),

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a database (4) with a set of graphic objects three-dimensional (5) that provide graphical information capable of increase the real image (6),

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a tracking system (9) that calculates and records the position of the display device (8),

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a processing unit (3), which converts graphic objects three-dimensional (5) in two-dimensional virtual representations (5 ') depending on the position of the display device (8) calculated by the tracking system (9), and that builds the enlarged image (6 ') by composing the two-dimensional virtual representations (5 ') of objects graphics (5) and the real image (6),

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a display device (8) for image display increased (6 '),

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media interaction (11) that provide an interface of Username.

2. System (1) according to claim 1, characterized in that the real camera (2) comprises zoom lenses, the interaction means (11) provide a user interface to vary the zoom of the enlarged image (6 ' ), and because when the user (13) acts on the interaction means (11), the processing unit (3) adjusts the zoom of the real camera (2) and properly converts the three-dimensional graphic objects (5) into virtual representations two-dimensional (5 '). 3. System (1) according to claim 1, characterized in that the system (1) includes at least one speaker (10) and that the database (4) includes a database for the increase of graphic objects three-dimensional (5) and a database of self-administered content for additional multimedia information (7) that can be displayed on the display device (8) and heard thanks to the speaker (10). 4. System (1) according to claim 1, characterized in that the tracking system (9) comprises an inertial sensor. 5. System (1) according to claim 1, characterized in that the display device (8) is a device that allows the display of images near the user's eyes (13) in a manner similar to a conventional prismatic. 6. System (1) according to claim 1, characterized in that it comprises a payment system (12). 7. System (1), according to claim 1, characterized in that the system (1) is an apparatus oriented towards the tourism and leisure sectors. 8. Method for generating an enlarged image (6 ') comprising a real image (6) or image from the point of view of a user (13) augmented with some interesting contents, characterized in that it comprises the following steps:

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provide a processing unit (3) with a database (4) that includes a series of objects three-dimensional graphics (5) that provide content interesting capable of increasing the real image (6),

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Record the real image (6) from the user's point of view (13) using a real camera (2),

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follow the position of a display device (8) by means of a tracking system (9),

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transform graphic objects three-dimensional (5) in two-dimensional virtual representations (5 ') depending on the position of the display device (8) calculated by the tracking system (9), and generate the image augmented (6 ') by aligning virtual representations two-dimensional (5 ') and the real image (6),

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display the enlarged image (6 ') by means of a display device (8),

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adapt the enlarged image (6 ') in function of changes in the position of the device display (8) or based on user commands through of the means of interaction (11), allowing the user (13) interact with areas of interest of the real image (6).

Method according to claim 8, characterized in that it includes the additional step of displaying, in the display device (8), additional multimedia information (7) stored in the database (4). 10. Method according to claim 8, characterized in that it further comprises the following steps:

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he user (13) interacts with the interaction means (11) to change the zoom ratio of the enlarged image (6 '),

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the Processing unit (3) changes the camera's zoom value real (2) and properly change virtual representations two-dimensional (5 ') of the three-dimensional graphic objects (5),

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the processing unit (3) recomposes the enlarged image (6 ') in function of the new zoom position.

Method according to claim 10, characterized in that when the user (13) acts on the interaction means (11) for a time t, the process of varying the zoom of the real camera (2) and readjusting the objects Three-dimensional graphs (5) in their corresponding two-dimensional virtual representations (5 ') are performed a certain number of times, at discrete intervals, during time t. Method according to claim 10, characterized in that it comprises the step of reading the final zoom value of the real camera (2) and setting the virtual camera zoom value (22) to said final zoom value of the real camera (2). 13. Method according to claim 10, characterized in that the processing unit (3) reads the zoom value of the real camera (2) in the form of a hexadecimal value and, and converts the three-dimensional graphic objects (5) into their corresponding two-dimensional virtual representations (5 ') based on an angle of view x given by
x = -2.87 * 10 12 y 3 + 1.99 * 10 7 y 2 * -0.00525077y + 48. 14. Method according to claim 10, characterized in that the processing unit (3) converts the three-dimensional graphic objects (5) into their corresponding two-dimensional virtual representations (5 ') based on an angle of view x, and then, change the real camera (2) based on a zoom value encoded as a hexadecimal value and given by y = -0.2274x3 + 22.593x2-949.94x + 18690.