FR3072249A1 - METHOD FOR DETECTING A FINGER ROTARY OR OTHER PART OF THE BODY OF A USER FROM A PARTICULARLY PORTABLE DEVICE - Google Patents

Abstract

The invention primarily relates to a method of detecting a user's body part (24), in particular a finger circumference, using a device (10) provided with a support such as a slab or screen (15), for example a mobile phone or a digital tablet, or other. The method is based in particular on the realization of a step of determining a datum relative to a dimension of the target zone (26) according to a gap between measurement markers (25.1, 25.2) and may, where appropriate, involve 2D or 3D models of the body part, as well as biometric data or not to carry out identification of the wearer .

Description

METHOD FOR DETECTING A FINGERTIME OR OTHER PART OF THE BODY OF A USER FROM A PARTICULARLY PORTABLE APPARATUS The present invention relates to a method of detecting a fingertip or other part of the body of a user. 'an user. The invention finds a particularly advantageous application with portable devices of the mobile phone or tablet type. However, the invention can also be implemented with mobile devices or not as well as with autonomous devices or not.

The invention comes from the need to determine the finger size of a user, in order to facilitate the initiation of a purchase act, in particular the purchase of a ring in the form of a jewel or communicating object.

A communicating ring described in particular in patent applications WO2016 / 180544, W02017 / 134170, or WO2017 / 134174 is capable of exchanging information with a mobile device and / or an external reader, such as a payment terminal or a motor vehicle starting system or a building access terminal.

In a manner known per se, it is possible to determine a finger turn from a ring holder provided with calibrated shapes or from a measuring device. From a digital point of view, some applications have been developed in order to provide the user with measurements of his or her fingertip. However, no known method interacts directly with the finger. In fact, these methods require the use of intermediate pieces of paper which are printed at predetermined dimensions corresponding to ring sizes and from which the user can deduce his finger turn. According to another known method, the circumference of the finger can be measured using a tape wrapped around the finger and then placed on the screen of the portable device. The user can then obtain his finger turn by comparing the length of the tape measured with reference sizes.

However, these methods are not intuitive and can lead to a large number of errors due to a lack of experience in handling. Indeed, in the case of the use of the tape, the precision of the measurement depends on the appreciation of the user who can more or less tighten the tape around his finger, which has a direct impact on the accuracy of measurement.

The invention aims to effectively remedy these drawbacks by providing a method of detecting a part of the body of a user, in particular a finger turn, using a device provided with a support such than a screen or a screen, for example a mobile phone or a digital tablet, characterized in that it comprises:

a step of bringing the part of the body into contact with the support of the device,

a step of moving at least one measurement mark relative to another measurement mark, so that the two measurement marks each coincide with an end edge of a target zone corresponding in particular to the zone intended for receive an object, such as a ring or bracelet, and

a step of determining data relating to a dimension of the target area as a function of a difference between the two measurement marks.

The invention thus allows to provide a method of detecting a part of the body of the user which is robust and simple to implement. In fact, the invention does not require the use of added elements, such as pieces of paper, but is implemented directly on the part of the body to be measured. The invention is also economical since it can be implemented on devices only by installing a suitable software application.

According to one implementation, said method comprises a step of validating the measurement when the user considers that the measurement marks coincide with the end edges of the target area.

According to one implementation, the displacement of the measurement mark (s) is carried out using control buttons, such as digital buttons and / or physical buttons, in particular buttons for adjusting the volume of the apparatus.

According to one implementation, the displacement of the measurement mark (s) is carried out by voice command, by movement, such as movements of the finger, the telephone, the hand in front of a camera or the like, or by variation of pressure exerted by the body part of the user.

According to one implementation, in the case where the support is of tactile type, the part of the body is detected by the support, in particular by pressing on the support, so that the measurement marks appear automatically on both sides. In the other part of the body of the user, a final adjustment of the measurement mark (s) along the end edges of the target zone can be carried out using user commands.

According to one implementation, in the case where the support is a screen (15) non-touch or a projection support such as a window, a desk, or other associated with a camera located above and / or below said projection support, the user maintains an end edge of the target area (26) against a measurement mark, for example a fixed line, and moves at least one mobile measurement mark until said measurement mark coincides with an opposite end edge of the target area. In the case of a camera under or above a support such as a window, an image processing of the part of the body placed on the window is carried out.

According to one implementation, the determination of the data relating to a dimension of the target area is carried out by transformation, via a mathematical calculation, of a measurement in pixel numbers of a difference between at least two measurement marks in a dimensional measurement.

According to one implementation, said method comprises a step of displaying a dimension of the user's finger according to a standard unit of measurement specific to a country of the user.

According to one implementation, the device transposes a measurement of the part of the body, for example the circumference of the finger, into one or more variables, such as a finger size, the variable or variables being used by a application managing the measurement or by another application or partly by the application and partly or totally remotely by servers.

The processing algorithms can be implemented locally on the device, in semi-remote mode, that is to say with processing partly local and partly on servers or totally on one or more servers.

According to one implementation, the data relating to a dimension of the target area of the part of the user's body is determined by pressing the finger on the support.

According to one implementation, the data relating to a dimension of the target area of the part of the user's body is determined by image analysis of a camera, in particular located at the front and / or at the front. rear of the unit.

According to one implementation, the data relating to a dimension of the target area of the part of the body of the user is determined by ultrasonic or infrared analysis.

According to one implementation, the data relating to a dimension of the target area of the body part of the user is determined by an external module.

According to one implementation, said method comprises a step of carrying out several measurements of the part of the user's body to increase the accuracy of the data relating to the dimension of the target area.

The invention also relates to an apparatus comprising a memory storing software instructions for the implementation of the method for detecting a part of the body of a user as defined in any one of the preceding claims.

According to one embodiment, the device may include a display screen or be devoid of it, for example comprising only a touch screen or a projection support.

According to one implementation, the determination of the data is based on the establishment of a multitude of lines tangent to the part of the body at points, so as to obtain a function derived from a circumference of the part of the body to perform several measurements. This allows you to sketch a succession of functions that will approximate the outline of the detected body. This development is facilitated in the case where the touch screen, the camera, the ultrasonic or infrared detector alone determines the outline of the body, and transforms it into a succession of points.

According to one implementation, said method comprises a step of building 2D or 3D models of a measured surface associated with the part of the body.

According to one implementation, said method comprises a step of combining several measurements and / or using several sensors to create a 3D image.

According to one implementation, a camera or an ultrasonic detector or a remote infrared detector captures a colored or calibrated area, so that when the user places a part of his body in this calibrated area, we deduce proportions of the body part.

According to one implementation, the determination of the information relating to a dimension of the body part is carried out from references, such as for example a photo of a hand located next to a coin, said method can also include processing steps to deduce the dimensions of any part of the user's body from a photograph on which we know the dimensions of a part of the user's body, such as his turn finger or shoe size.

For example, by image analysis, a ring worn by a user is detected. Knowing the dimensions of the ring, the system can provide dimensions of any other part of the body transformed into a point cloud, and after a succession of treatments and operations.

According to one implementation, the processing steps are based on an exploitation of information originating from a combination of several sensors, such as for example a camera and a distance sensor to estimate a distance between the camera and the body , necessary for the application of a proportionality principle, or two cameras under certain conditions. If the place is calibrated it is however possible to do without it.

According to one implementation, said method comprises a step of connection to a network so as to exchange, archive and / or compare data.

According to one implementation, said method comprises a step of taking one or more pieces of information from the body before, during or after having carried out a measurement, of the temperature, weight, humidity, fatty density type, reading of veins, pulse, iris, impedance, reflectivity, DNA, skin pigmentation, fingerprint, cracking or asperity of the skin, or biometric data of all kinds.

According to one implementation, said method comprises a step of taking or exchanging one or more pieces of information from one or more objects carried by the user before, during, or after, a dimensional measurement via a communication type NFC, Bluetooth, lora, Sigfox, GSM, or via radio or other telephone networks, WIFI, barcode, QR codes, color, shape, model of an object. Several data cited above may be correlated.

According to one implementation, said method comprises a step of construction of a structural model of the part of the body measured making it possible to overcome possible dimensional variations of the part of the body of the user. In other words, we define a structure of the body part of the user to be able to neglect the dimensional changes.

According to one implementation, said method comprises a step of recognition and analysis of distinctive marks of the body such as tattoos, moles, scars, or other skin imperfections and / or a step of recognizing objects worn or not by the user, such as a ring, a bracelet, a necklace, a watch, a garment, shoes, a hat, a cap, glasses, to know the presence or not of these objects as well as their dimensions.

According to one implementation, said method comprises a step of correlating biometric data or not to ensure identification of the user.

Thus, it is possible to correlate several analyzes (physiognomic constitution of a part of the body combined with a fingerprint reading or other method or alternatively a physiognomic constitution of a body combined with a watch or garment model or any type of object including tattoos and moles) to ensure secure identification thanks to the multiplication of measurements and measurement channels of biometric data or not.

In the case of a worn object, if the object is able to demonstrate that it has identified its carrier directly, during the measurement or some time before or during the wearing of the object (with synchronization and by the principle of persistence) via a connection that can be remote at the instant (before, during or after) when the device attempts to analyze one or more measurements, then we can consider that a given biometric associated with the wearing of an object linked to its wearer is a strong identification of the wearer. The system according to the invention can thus be considered as a security device.

The measurements extracted from the image analysis and / or from the tactile detection make it possible to generate one or more keys which will potentially serve as an identification device.

According to one implementation, said method includes an empirical learning step to improve the detection performance by artificial intelligence and / or neural networks.

The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These figures are given only by way of illustration but in no way limit the invention.

Figure 1 is a schematic representation of a portable device of the mobile phone or tablet type capable of implementing the method according to the invention for automatic detection of a part of the body of a user;

Figure 2 is a schematic representation of the measurement of a turn of the finger using dimensional marks displayed on a screen;

Figure 3 is a diagram of the different steps of the method according to the invention for detecting a finger turn or other part of the body of a user.

Identical, similar or analogous elements retain the same reference from one figure to another.

FIG. 1 shows a portable device 10 of the mobile phone or digital tablet type comprising a microcontroller 11 integrating a microprocessor 12 and a memory 13, as well as a human-machine interface 14 comprising for example a touch screen 15.

According to a particular embodiment, the portable device 10 may also include a central control button 16 as well as other physical control buttons, such as buttons for adjusting the volume 17. However, this does not is not compulsory, the device 10 being able to comprise only digital control buttons which are displayed on the screen 15. The functional elements 12, 13, 15 communicate with each other via a standard communication bus 19. As a variant, the screen 15 is not tactile and the man-machine interface 14 takes the form of a physical keyboard. A camera 18 could be installed at the front and / or at the rear of the device 10.

The portable device 10 may also include other components necessary for its operation (communication module, microphone, speaker, etc.) which are not shown in the figure in order to facilitate understanding of the 'invention. These elementary components are known to those skilled in the art.

The memory 13 stores 11-In software instructions used by an application 20 whose corresponding icon 21 Finger measurement measurement is displayed on the screen 15. The invention is thus described below, with reference to the Figures 2 and 3, for the detection of a turn of the finger but it could also be implemented for the measurement of a dimension of another part of the body of the user, such as the wrist or the foot.

During a step 100, the user selects, via the icon 21, the Fingertip measurement application to trigger the execution of the corresponding 11-In instructions. The application 20 then invites the user to place his finger 24 stretched out on the screen 15 via the display of a message 23.

In a step 101, the user brings his finger 24 into contact with the screen 15 of the device, as shown in FIG. 2. In the case where the screen 15 is of the touch type, the body part is detected by the screen 15, in particular by pressing on the screen 15. Measurement marks 25.1, 25.2 then appear automatically, in a step 102, on either side of the user's finger 24 . These marks 25.1, 25.2 may advantageously take the form of straight lines. Alternatively, the lines have a slightly curved shape matching the external contour of finger 24. The marks may take the form of cursors.

A final adjustment of the reference mark (s) 25.1, 25.2 around a target zone 26 corresponding for example to the zone intended to receive the ring is carried out in a step 103. This adjustment can be carried out using commands from the user.

To do this, only one of the measurement marks 25.1, 25.2 may be movable relative to the other. Alternatively, the two pins 25.1, 25.2 are movable relative to each other. The displacement of at least one reference 25.1,

25.2 with respect to the other mark is made so that the two measurement marks 25.1, 25.2 each coincide with an end edge of the target area 26.

It should be noted that, in the case where the screen 15 is of the tactile type, the adjustment of the marker (s) 25.1, 25.2 to the width of the target area 26 can be carried out while the finger 24 is in contact with the screen 15.

Alternatively, the adjustment of the marks 25.1, 25.2 can be carried out with respect to a shape which is displayed on the screen 15 following the detection of the pressure of the finger 24 against the touch screen, the user then being able to remove your finger from the screen 15.

In the case where the screen 15 is not of the tactile type, the user maintains an end edge of the target zone 26 against a measurement mark

25.1, 25.2 displayed on the screen 15 or a projection support such as a window, a desk, or the like associated with a camera situated above and / or below said projection support. The user then moves a mobile marker 25.1,25.2 until said mobile marker 25.1, 25.2 coincides with the opposite end edge of the target area 26.

In all cases, the displacement of the measurement mark (s) 25.1, 25.2 can be carried out using control buttons, such as numeric buttons and / or physical buttons, in particular volume adjustment buttons 17 of the 'apparatus. The reference mark (s) 25.1, 25.2 can thus move at the rate of pressing on the control buttons and approach one towards the other until they come into coincidence with a corresponding end edge of the target area 26.

Alternatively, the displacement of the marker (s) 25.1, 25.2 is effected by voice command, by movement, such as movements of the finger, the telephone, the hand in front of a camera or the like, or by variation of a pressure exerted. by the user's body part.

When the user considers that the measurement marks 25.1, 25.2 coincide with the end edges of the target area 26, the user validates the measurement in a step 104. To this end, the user can for example press a validation button 27 displayed on the screen 15.

Once the validation has been carried out, a mathematical calculation taking into account a dimension of each pixel of the screen 15 makes it possible to transform, in a step 105, a measurement in pixel numbers of the difference between the marks 25.1 and 25.2 in a dimensional measurement. The measured distance is assimilated to the diameter of the user's finger 24.

Alternatively, the difference between the benchmarks 25.1, 25.2 is transformed into one or more variables, such as a finger size 24 expressed in the standard of the country concerned. The variable or variables being used by an application managing the measurement or by another application or partly by the application and partly or totally remotely by servers.

The data thus determined (dimension and / or value corresponding to the dimension of the finger, such as a normalized finger size 24) can be displayed on the screen 15 of the device 10 in a step 106. The dimension finger 24 can thus be displayed according to a standard measurement unit specific to the user's country.

The display of this data is however not necessary. In fact, the data relating to the measurement could be sent directly to the application in a manner transparent to the user, without being displayed on the screen 15 of the device. As a variant, the data relating to the measurement is displayed and transmitted to the application.

In order to increase the accuracy of the data relating to the dimension of the target area 26, it will be possible to carry out several measurements of the user's finger 24. Typically, it will be possible to make a first measurement of the diameter of the finger 24 with the finger placed on the screen 15 by its underside as well as a second measurement of the diameter of the finger 24 with the finger placed on the edge.

It is of course possible to apply this detection to other parts of the body. We can, for example, identify the dimensions (width, perimeter, radius or diameter) of a wrist or a foot using the same method as that described above.

Alternatively, the size of the target area 26 of the body part of the user or a corresponding value is determined by image analysis of the camera 18.

Alternatively, the size of the target area 26 of the body part of the user or a corresponding value is determined by ultrasonic or infrared analysis.

Alternatively, the data relating to a dimension of a target area 26 of the body part of the user is determined by an external module.

The invention is not limited to a part of the isolated body and could be applied to a whole body.

Alternatively or in addition, the determination of the dimensional data is based on the establishment of a multitude of lines tangent to the part of the body at points, so as to obtain a function derived from a circumference of the part of the body to perform multiple measurements. This allows you to sketch a succession of functions that will approximate the outline of the detected body. This development is facilitated in the case where the touch screen, the camera, the ultrasonic or infrared detector alone determines the outline of the body, and transforms it into a succession of points.

It is also possible to construct 2D or 3D models of a measured surface associated with the part of the body. One can also combine several measurements and / or use of several sensors to create a 3D image.

According to a particular implementation, a camera or an ultrasonic detector or a remote infrared detector captures a colored or calibrated area, so that when the user places a part of his body in this calibrated area, it is deduced therefrom proportions of the body part.

The determination of the information relating to a dimension of the body part can also be carried out from references, such as for example a photo of a hand situated next to a coin, said method also being able to include processing steps to deduce the dimensions of any part of the user's body from a photograph on which we know the dimensions of a part of the user's body, such as his finger size or a shoe size.

For example, by image analysis, a ring worn by a user is detected. Knowing the dimensions of the ring, the system can provide dimensions of any other part of the body transformed into a point cloud, and after a succession of treatments and operations.

The processing steps can be based on an exploitation of information originating from a combination of several sensors, such as for example a camera and a distance sensor to estimate a distance between the camera and the body, necessary for application of 'a principle of proportionality, or two cameras under certain conditions. If the part is calibrated it is however possible to do without this.

The device can also connect to a network so as to exchange, archive and / or compare data.

We can also take one or more pieces of information from the body before, during or after making a measurement, such as temperature, weight, humidity, fat density, reading of veins, pulse, iris, impedance, reflectivity. , DNA, pigmentation of the skin, fingerprint, chapped skin or roughness of the skin, or biometric data of all kinds.

It is also possible to take or exchange one or more pieces of information from one or more objects carried by the user before, during, or after, a dimensional measurement via an NFC, Bluetooth, Lora, Sigfox, GSM type communication. , or via a radio or other telephone network, WIFI, barcode, QR codes, color, shape, model of an object. Several data cited above may be correlated.

A structural model of the body part measured can be constructed to overcome possible dimensional variations in the body part of the user. In other words, we define a structure of the body part of the user to be able to neglect the dimensional changes.

One can also provide a step of recognition and analysis of distinctive marks of the body such as tattoos, moles, scars, or other skin imperfections and / or a step of recognition of objects worn or not by the user, such as a ring, a bracelet, a necklace, a watch, a garment, shoes, a hat, a cap, glasses, to know the presence or not of these objects as well as their dimensions.

User identification can be ensured through the correlation of biometric data or not. Thus, it is possible to correlate several analyzes (physiognomic constitution of a part of the body combined with a fingerprint reading or other method or alternatively a physiognomic constitution of a body combined with a watch or clothing model or any type objects including tattoos and moles) to ensure secure identification thanks to the multiplication of measurements and measurement channels of biometric data or not.

In the case of a worn object, if the object is able to demonstrate that it has identified its carrier directly, during the measurement or some time before or during the wearing of the object (with synchronization and by the principle of persistence) via a connection that can be remote at the instant (before, during or after) when the device attempts to analyze one or more measurements, then we can consider that a given biometric associated with the wearing of an object linked to its wearer is a strong identification of the wearer. The system according to the invention can thus be considered as a security device.

It will be possible to provide an empirical learning step to improve detection performance by artificial intelligence and / or neural networks. It will be appreciated that the above description has been given by way of example only and does not limit the field of the invention from which one would not depart by replacing the various elements or steps by any other equivalent.

In addition, the different characteristics, variants, and / or embodiments of the present invention can be associated with each other in various combinations, insofar as they are not incompatible or mutually exclusive of each other.

Claims (27)

1. A method of detecting a part of the body (24) of a user, in particular a finger loop, using an apparatus (10) provided with a support such as a screen or a screen ( 15), for example a mobile phone or a digital tablet, characterized in that it comprises: a step of bringing the part of the body (24) into contact with the support (15) of the device (10), - a step of moving at least one measurement mark (25.1,25.2) relative to another measurement mark (25.1, 25.2), so that the two measurement marks (25.1, 25.2) each coincide with an edge end of a target area (26) corresponding in particular to the area intended to receive an object, such as a ring or a bracelet, and - a step of determining data relating to a dimension of the target area (26) as a function of a difference between the two measurement marks (25.1,25.2). 2. Method according to claim 2 or 3, characterized in that it includes a measurement validation step when the user considers that the measurement marks (25.1, 25.2) coincide with the end edges of the target area (26). 3. Method according to claim 1 or 2, characterized in that the displacement of the measurement mark (s) (25.1,25.2) is carried out using control buttons, such as numeric buttons and / or physical buttons, in particular buttons for adjusting the volume (17) of the device (10). 4. Method according to claim 1 or 2, characterized in that the displacement of the measurement mark (s) (25.1,25.2) is carried out by voice command, of movement, such as movements of the finger, of the telephone, of the hand in front a camera or the like, or by varying a pressure exerted by the body part (24) of the user. 5. Method according to any one of claims 1 to 4, characterized in that in the case where the support (15) is of tactile type, the part of the body (24) is detected by the support (15), in particular by pressure on the support (15), so that the measurement marks (25.1, 25.2) appear automatically on both sides of the body part (24) of the user, a final adjustment of the measurement marks (25.1,25.2) along the end edges of the target area (26) which can be carried out from user commands. 6. Method according to any one of claims 1 to 4, characterized in that, in the case where the support is a screen (15) non-touch or a projection support such as a window, a desk, or other associated to a camera located above and / or below said projection support, the user maintains an end edge of the target area (26) against a measurement mark (25.1, 25.2), for example a fixed line, and moves at least one movable measurement mark (25.1,25.2) until said measurement mark (25.1,25.2) coincides with an opposite end edge of the target area (26). 7. Method according to any one of claims 1 to 6, characterized in that the determination of the data relating to a dimension of the target area (26) is carried out by transformation, via a mathematical calculation, of a measurement in numbers pixels of a difference between at least two measurement marks (25.1,25.2) in a dimensional measurement. 8. Method according to any one of claims 1 to 7, characterized in that it comprises a step of displaying a dimension of the finger (24) of the user according to a standard measurement unit specific to a country of the user. 9. Method according to any one of claims 1 to 8, characterized in that the device transposes a measurement of the body part, for example the finger circumference (24), in one or more variables, such as a finger size (24), the variable or variables being used by an application managing the measurement or by another application or partly by the application and partly or totally remotely by servers. 10. Method according to any one of claims 1 to 9, characterized in that the data relating to a dimension of the target area (26) of the body part (24) of the user is determined by means of the pressure of the finger (24) on the support (15). 11. Method according to any one of claims 1 to 9, characterized in that the data relating to a dimension of the target area (26) of the body part (24) of the user is determined by image analysis a camera (18) in particular located at the front and / or at the rear of the device (10). 12. Method according to any one of claims 1 to 9, characterized in that the data relating to a dimension of the target area (24) of the part of the body (24) of the user is determined by ultrasonic or infrared analysis . 13. Method according to any one of claims 1 to 9, characterized in that the data relating to a dimension of the target area (26) of the body part (24) of the user is determined by an external module. 14. Method according to any one of claims 1 to 13, characterized in that it comprises a step of carrying out several measurements of the part of the body (24) of the user to increase the accuracy of the data relating to the dimension of the target area (26). 15. Method according to any one of claims 1 to 14, characterized in that the determination of the data is based on the establishment of a multitude of lines tangent to the part of the body at points, so as to obtain a function derived from a circumference of the body part to perform several measurements. 16. Method according to any one of claims 1 to 15, characterized in that it comprises a step of construction of 2D or 3D models of a measured surface associated with the part of the body. 17. Method according to any one of claims 1 to 15, characterized in that it comprises a step of combining several measurements and / or using several sensors to create a 3D image. 18. Method according to any one of claims 1 to 17, characterized in that a camera or an ultrasonic detector or a remote infrared detector captures a colored or calibrated area, so that when the user places part of his body in this calibrated area, we deduce the proportions of the body part. 19. Method according to any one of claims 1 to 18, characterized in that the determination of the information relating to a dimension of the body part is carried out from references, such as for example a photo of a hand located next to a coin, said method can also include processing steps to deduce the dimensions of any part of the user's body from a photograph on which we know the dimensions of a part of the body of a user, such as his finger size or a shoe size. 20. The method of claim 19, characterized in that the processing steps are based on an exploitation of information from a combination of several sensors, such as for example a camera and a distance sensor to estimate a distance between the camera and the body, necessary for the application of a principle of proportionality, or two cameras under certain conditions. 21. Method according to any one of claims 1 to 20, characterized in that it comprises a step of connection to a network so as to exchange, archive and / or compare data. 22. Method according to any one of claims 1 to 21, characterized in that it comprises a step of taking one or more pieces of information from the body before, during or after having carried out a measurement, of the temperature, weight and humidity type. , fat density, reading of veins, pulse, iris, impedance, reflectivity, DNA, skin pigmentation, fingerprint, cracking or roughness of the skin, or biometric data of all kinds. 23. Method according to any one of claims 1 to 22, characterized in that it comprises a step of taking or exchanging one or more pieces of information from one or more objects carried by the user before, during, or after, a dimensional measurement via radio or other type of communication. 24. Method according to any one of claims 1 to 23, characterized in that it comprises a stage of construction of a structural model of the part of the body measured making it possible to be free from possible dimensional variations of the part of the body of the user. 25. Method according to any one of claims 1 to 24, characterized in that it comprises a step of recognition and analysis of marks 5 distinctive of the body such as tattoos, moles, scars, or other skin imperfections and / or a step of recognizing objects worn or not worn by the user, such as a ring, a bracelet, a necklace, a watch, a garment, shoes, a hat, a cap, glasses, to know the presence or not of these objects as well as their dimensions. 26. Method according to any one of claims 1 to 25, characterized in that it comprises a step of correlating biometric data or not to ensure identification of the user. 27. A method according to any one of claims 1 to 26, characterized in that it comprises a step of empirical learning by artificial intelligence and / or neural networks.