GB2586950A

GB2586950A - Garment, method and device

Info

Publication number: GB2586950A
Application number: GB1908183.5A
Authority: GB
Inventors: Mahmood Tahir; Crofts Adam
Original assignee: Prevayl Ltd
Current assignee: Prevayl Ltd
Priority date: 2019-06-07
Filing date: 2019-06-07
Publication date: 2021-03-17
Anticipated expiration: 2039-06-07
Also published as: GB201908183D0; GB2586950B

Abstract

A garment 11 comprises: a sensor 101, 103 arranged to monitor the activity of the wearer of the garment; a communication unit 105 arranged to receive activity data for the wearer from the sensor and transmit the activity data to an external device 15; and a fiducial marker 107 in the form of a 2D image located on an outside surface of the garment. The fiducial marker is arranged such that, when imaged by an image capturing device 13, the fiducial marker is useable to determine position information for the garment. The fiducial marker may be an augmented reality marker and may further comprise a code string identifying the garment encoded into a visual symbol, usable to access activity data associated with the sensor of the garment. The system may simultaneously display a representation of the wearer of the garments, such as an avatar, with a representation of the activity data on a display, wherein the activity data may partially overlay the representation of the wearer at a position corresponding to the estimated location of the sensor (see fig.3). The activity data may comprise data related to a muscle or cardiac activity.

Description

GARMENT, METHOD AND DEVICE The present invention is directed towards a method, garment and system. The present invention is directed in particular towards determining position information for a garment.

Background

Garments incorporating sensors are wearable electronics designed to interface with a wearer of the garment and to determine information such as the wearer's heart rate, rate of respiration, activity level, and body positioning. Such properties can be measured with a sensor assembly that includes a sensor for signal transduction and/or microprocessors for analysis. Such garments are commonly referred to as:smart clothing: It would be desirable to provide a mechanism for determining position information for a garment such as by tracking the motion of the garment

Summary

According to the present disclosure there is provided a garment method and device as set forth in the appended claims. Other features of the invention will be apparent from the dependent claims, and the description which follows.

According to a first aspect of the invention, there is provided a garment The garment comprises a sensor arranged to monitor the activity of the wearer of the garment The garment comprises a communication unit arranged to receive activity data for the wearer from the sensor and transmit the activity data to an external device. The garment comprises a fiducial marker in the form of a 2D image located on an outside surface of the garment The fiducial marker is arranged such that when imaged by an image capturing device, the fiducial marker is useable to determine position information for the garment Beneficially, a fiducial marker is useable as a point of reference forthe ga rment and thus enables the position of the garment and the motion of the garment over time to be monitored simply by capturing images of the garment In this way, the marker beneficially allows for the motion of the garment to be monitored. The fiducial marker of the present invention is beneficial as it is simple, of low cost and does not negatively affect the comfort of the garment for the wearer.

The fiducial marker may be an Augmented Reality (AR) marker.

The fiducial marker may comprise a code string identifying the garment encoded into a visual symbol. The fiducial marker may be arranged such that when imaged by an image capturing device, the at least one fiducial marker is useable to access activity data associated with the sensor of the garment The fiducial marker may comprise a plurality of fiducial markers. The plurality of fiducial markers may be located at different locations on the garment The plurality of fiducial markers may be arranged in a geometric pattern. The plurality of fiducial markers may be arranged together on the garment to form a decorative item.

The plurality of fiducial markers may be located at different locations on the garment The fiducial marker may be integrated into the garment The fiducial marker may be printed onto the garment Any known garment printing technique may be used such as screen printing or inkjet printing.

The fiducial marker may be incorporated into the stitching of the garment and/or a seam of the garment and/or a hem of the garment and/or a neckline of the garment, and/or a collar of the garment and/or a sleeve of the garment and/or a cuff of the garment and/or a pocket of the garment, and/or a body of the garment and/or a fastener of the garment The fastener may be a zipper, button, clasp, toggle, stud, snap fastener, popper, eyelet buckle, tie or ribbon.

The sensor may comprise a plurality of sensors.

The sensor may comprise one or a combination of bioelectrica I sensors, biomagnetic sensors, biochemical sensors, biomechanical sensors, bioacoustic sensors, biooptical sensors, and biothermal sensors. The bioelectrical sensor may be a biopotentia I and/or bioimpedance sensor. The biopotentia I sensor may be an ECG or EKG (electrocardiogram), EEG (electroencephalogram), E MG (electromyogram), sensor. The bioimpedance sensor may be a plethysmography (e.g., for respiration), body composition (e.g., hydration, fat etc.), or EIT (electroimpedance tomography) sensor.

In some examples, the fiducial marker has a limited visual footprint on the garment. This means that the fiducial marker is sufficiently small that it is not easily visible by the naked eye but is still visible in the image captured by the image capturing device. In this way, the fiducial marker does not affect or has a minimal effect on the appearance of the garment. In some examples, the fiducial marker is visible to the naked eye.

The fiducial marker may be incorporated into or form part of visual e le ment on the garment which may be a decorative item in the garment The decorative item may be a logo, design, image or pattern on the garment In this way, the fiducial marker may contribute to or enhance the appearance of the garment The garment may be one of a shirt, t-shirt, blouse, dress, brassiere, shorts, pants, arm or leg sleeve, jacket/coat, glove, armband, vest underwear, headband, hat/cap, collar, wristband, stocking, sock, or shoe.

The garment may be a shirt. The fiducial marker may be located on the collar, yoke, sleeve, gauntlet, cuff, body, pocket placket( or fastener of the shirt. The shirt may comprise a plurality of fiducial markers. The plurality of fiducial markers may be located at a plurality of different positions on the shirt The plurality of different positions on the shirt may comprise one or more of the collar, yoke, sleeve, gauntlet cuff, body, pocket, plackett, or fastener of the shirt The garment may be a T-shirt. The fiducial marker may be located on the neckline, sleeve, cuff, body or hem of the T-shirt. The T-shirt may comprise a plurality of fiducial markers. The plurality of fiducial markers may be located at a plurality of different positions on the T-shirt. The plurality of different positions on the shirt may comprise one or more of the neckline, sleeve, cuff, body or hem of the T-shirt.

According to a second aspect of the invention, there is provided a method. The method comprises obtaining an image of a garment according to the first aspect of the invention. The method comprises processing the image to determine the location of the fiducial marker.

The method may further comprise displaying a representation of the activity data on a display. The display may be part of an electronic device or may be communicatively coupled to the electronic device.

The position of the representation of the activity data on the display may be determined according to the determined location of the fiducial marker.

The position of the representation of the activity data may be determined by applying a predetermined displacement to the coordinate location of the fiducial marker.

The position of the representation of the activity data may correspond to the position of a feature of interest on a wearer of the garment The method may further comprise simultaneously displaying a representation of a wearer of the garment with the representation of the activity data on the display. The representation of the activity data may at least partially overlay the displayed representation of the wearer.

Beneficially, the display of the activity data is enhanced by positioning the activity data over the representation of the wearer so that the user can understand the relationship between the activity data and a relevant physiological component of the wearer.

Displaying the representation of the wearer of the garment may comprise displaying the obtained image. The obtained image may be a live view image. That is the camera may capture live view image data which may then be displayed on the display of the user electronic device. The user may therefore view a live view image of the wearer.

Displaying the representation of the wearer of the garment may comprise displaying an avatar representation of the wearer. The avatar representation of the wearer may be a 3D representation of the wearer. The avatar may be animated to mimic the motion of the wearer. The avatar may be animated based on motion data obtained from one or more motion sensors of the garment.

The representation of the activity data may represent a physiological state of the wearer. The physiological state may relate to a muscle or muscle group of the wearer, an organ of the wearer such as the heart or lung(s), or a condition such as the wearers hydration level.

The activity data may comprise activity data related to a muscle or muscle group of a wearer of the garment The position of the representation of the activity data may be determined to correspond to an estimated location of the muscle or muscle group of the wearer as determined from the location of the fiducial marker. The method may comprise simultaneously displaying a representation of the wearer with the representation of the activity data. The representation of the activity data may be displayed such that it overlays the representation of the wearer at the position corresponding to the estimated location of the muscle or muscle group of the wearer.

The muscle or muscle groups may comprise one or more of the triceps, deltoids, pectorals, abdomina Is, quadriceps, hamstrings, gluteals, and forearms.

The representation of the activity data may represent a physiological state of the muscle or muscle group such as whether the muscle or muscle group are in contraction or relaxation. The representation of the activity data may convey information relating to the activity level of the muscle or muscle group such that the representation may have a darker or lighter colour depending on the intensity of the activity performed by the user.

The activity data may comprise cardiac activity data. The position of the representation of the activity data may be determined to correspond to an estimated location of the heart of a wearer of the garment as determined from the location of the fiducia I marker. The method may comprise

S

simultaneously displaying a representation of the wearer with the representation of the activity data. The representation of the activity data may be displayed such that it overlays the representation of the wearer at the position corresponding to the estimated location of the heart of the wearer.

The representation of the activity data may represent a physiological state of the heart such as the heart rate.

The representation of the activity data may be in the form of an augmented reality object The representation of the activity data may be in the form of a 2D or 3D object of a feature of interest of the wearer such as a muscle, muscle group or organ. The object may be in the form of a 2D or3D model of a heart. The model ofthe heart is animated to beat at a rate corresponding to the heart rate of the wearer as determined from the activity data.

The obtained image may be captured by a camera that is communicatively coupled to the electronic device. The camera may capture a live view image. Obtaining the image may therefore comprise capturing the image by a camera that is communicatively coupled to the electronic device. The camera may be part of the user electronic device. The electronic device may perform the step of processing the image to generate the data string from the visual symbol.

Alternatively, the electronic device may transmit the image to another electronic device to perform the step of processing.

According to a third aspect of the invention, there is provided a computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method of the second aspect of the invention.

According to a fourth aspect of the invention, there is provided a computer readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out the method of the second aspect of the invention.

According to a fifth aspect of the invention, there is provided a user electronic device opera ble to perform the method of the second aspect of the invention.

According to a sixth aspect of the invention, there is provided a method of manufacturing a garment according to the first aspect of the invention. The method comprises incorporating a fiducial marker in the form of a 2D image onto an outside surface of the garment

Brief Description of the Drawings

Examples of the present disclosure will now be described with reference to the accompanying drawings, in which: Figure 1 shows an example garment electronic device and server according to aspects of the present invention; Figures 2A and 2B show example markers in accordance with aspects of the present invention; Figure 3 shows an example system according to aspects of the present invention; and Figure 4 shows a flow diagram for an example method according to aspects of the present invention.

Detailed Description

The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are not limited to the bibliographical meanings, but are merely used by the inventor to enable a clear and consistent understanding of the disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the disclosure is provided for illustration purpose only and notfor the purpose of limiting the disclosure as defined by the appended claims and their equivalents.

It is to be understood that the singular forms 'a, _ 'an, _ and 'the_ include plural referents unless the context clearly dictates otherwise.

Referring to Figure 1, there is shown an example garment 11, user electronic device 13, and server 15 in accordance with aspects of the present invention. The garment 11, user electronic device 13, and server 15 form an example system 100 in accordance with aspects of the invention.

The garment 11 in the example of Figure 1 is in the form of a T-shirt. The garment 11 comprises two sensors 101, 103 arranged to monitor the activity of the wearer of the garment 11. In this example, one of the sensors 101 acts as a monitoring unit and the other sensor 103 acts as a reference unit. The sensors 101, 103 are communicatively coupled to a communication unit 105 arranged to transmit activity data to the server 15. Of course, each sensor 101, 103 may have their own communication unit The transmission may be performed over a high throughput wireless communication protocol such as 56.

The garment 11 comprises a fiducial marker 107 located on the outside surface of the garment 11 and in particular on the main body of the T-shirt. The fiducial marker 107 is in the form of a 2D image. The fiducial marker 107 is arranged such that when imaged by an image capturing device, the fiducial marker 107 is useable to determine position information for the garment The fiducial marker 107 may also comprises a code string identifying the garment encoded into a visual symbol as shown in Figures 2A and 2B. In this way, the fiducial marker 107 is arranged such that when imaged by an image capturing device such as the camera of the user electronic device 13, the marker 107 is useable to access activity data associated with the garment 11. In more detail, a code may be generated for the garment using a random number generator. The code may be in a code format with sufficient address space to enable a sufficient number of different codes to be generated. For example, the code format may be in the form of a 14-character hexadecimal number. Once the code is generated by the random number generator, a processor running an algorithm converts the code into a visual symbol which is printed or otherwise manufactured onto the garment Encoding the code into a visual symbol is beneficial because the original code cannot be parsed from the visual symbol without access to the encoding algorithm. Moreover, the visual symbol is easily machine readable by providing image data of the visual symbol captured using a camera. As an added benefit the visual symbol is also useable as a fiducial marker for tracking the motion of the garment The user electronic device 13 in the example of Figure 1 is in the form of a mobile phone with an integrated camera. The user electronic device 13 comprises a communication unit a storage, a controller, a display 109, a camera and a user input unit. The controller provides overall control to the user electronic device 13. The communication unit transmits and receives various pieces of information required for communication with a server underthe control of the controller. The communication unit transmits the data string to the server and receives activity data from the server. The user input unit receives inputs from the user such as a user credential. The camera captured the image of the garment The storage stores information for the user terminal.

The display 109 is arranged to show a live view image of the scene captured by the camera.

The display 109 may be a presence-sensitive display and therefore may comprise the user input unit The presence-sensitive display may include a display component and a presence-sensitive input component The presence sensitive display may be a touch-screen display arranged to provide the user interface.

The user electronic device 13 may also include a biometric sensor. The biometric sensor may be used to identify a user or users of device based on unique physiological features. The biometric sensor may be: a fingerprint sensor used to capture an image of a user's fingerprint an iris scanner or a retina scanner configured to capture an image of a user's iris or retina; an ECG module used to measure the user& ECG; or the camera of the user electronic arranged to capture the face of the user. The biometric sensor may be an internal module of the user electronic device. The biometric module may be an external (stand-alone) device which may be coupled to the user electronic device by a wired or wireless link.

User electronic devices in accordance with the present invention are not limited to mobile phones and may take the form of any electronic device which may be used by a user to perform the methods according to aspects of the present invention. The user electronic device may be a mobile electronic device such as a smartphone, tablet personal computer (PC), mobile phone, smart phone, video telephone, laptop PC, netbook computer, personal digital assistant (P DA), mobile medical device, camera or wearable device. The wearable device may include a head-mounted device such as an Augmented Reality, Virtual Reality or Mixed Reality head-mounted device. The user electronic device may be desktop PC, workstations, television apparatus or a projector, e.g. arranged to project a display onto a surface.

The server 15 may be a single device or may comprise a plurality of distributed devices communicatively coupled to one another, e.g. as a cloud-based server such as cloud server network. The server comprises a communication unit, a storage, and a controller. The controller provides overall control to the server. The communication unit transmits and receives various pieces of information required for communication with a user electronic device and/or garment under the control of the controller. The storage stores information for the server such as code strings identifying garments and user credential information.

The garment may be worn by a flrst person referred to as the 'wea rer_. A second person referred to as the 'user_ is in possession of a user electronic device such as a mobile phone. The second person may desire to see activity data for the wearer as recorded by the sensors of the garment. For example, the user may be a personal trainer that may desire to view metrics such as the wearers heartrate, respiration levels and hydration levels. The user may also be a healthcare professional such as a physiotherapist or doctor.

In some examples, the 'user_ and the 'wearer_ refer to the same person. For example, the user electronic device may be a television apparatus with an integrated camera. The wearer of the garment may stand in front of the television apparatus and may be captured by the camera of the television apparatus. The television apparatus may then display the activity data so that the wearer may view their activity information.

Referring to Figure 2A, there is shown an example marker 201 in accordance with the present invention. The marker 401 in this example is based on the Vcode ÷ provided by VS T Enterprises and comprises a visual symbol in the form of black marks upon white pathways. The black marks represent the characters in the code string. The visual symbol may additionally encode redundant information for error detection, correction, and uniqueness over different rotations of the marker. Beneficially, the present invention uses this marker 201 as a fiducial marker 201 for determining position information for the garment Referring to Figure 2B, there is shown an example fiducial marker 203 in accordance with the present invention. The fiducial marker 203 in this example is derived from the AR marker system known as AR Tag. The fiducial marker 203 comprises a visual symbol in the form of a 6x6 grid of black or white cells which represent 36 bina ry:0 -or:1-symbols. The 36-bit sequence encodes the code string and may additionally encode redundant information for error detection, correction and uniqueness over the different rotations of the marker.

In both examples, the code string/data string may be retrieved from the marker 201, 203 by processing an image containing the visual symbol. It will be appreciated that known image processing operations such as contour extraction and edge detection will be used to read the symbol from the image.

It will be appreciated that the marker 201, 203 in accordance with the present invention is not limited to the examples of markers shown in Figures 2A and 2B. Instead, other forms of markers 201, 203 that encode a code string identifying the garment into a visual symbol may be used. In most preferred examples, the markers 201, 203 are additionally used as fiducial markers 201, 203. This means that the markers 201, 203 act as a point of reference for the garment and thus enable the position of the garment and the motion of the garment over time to be monitored simply by capturing images of the garment Generally, the marker 201, 203 is preferred to be a bitona I marker as this means that there is no need to identify different shades of grey within the marker 201, 203 during the image processing operation to identify and optionally decode the marker 201, 203. T his beneficially helps reduce the sensitive to lighting conditions and camera settings. Of course, in some examples the marker 201, 203 may not be bitonal and may comprise different grey levels or indeed different colours.

Referring to Figure 3, there is shown an example user interface 300 displayed on the user electronic device 13.

The user interface 300 includes a display of a representation of the wearer of the garment 301. In this example, the representation of the wearer of the garment 301 is in the form of a 3D avatar. The 3D avatar will move as the wearer moves as a result of the motion tracking performed using the fiducial marker(s) provided on the garment 11. A more refined motion estimate may be provided by incorporating additional active motion sensors such as accelerometers and gyroscopes into the garment 11. In other examples, the displayed representation of the wearer of the garment 301 is in the form of a live view image as captured by the camera of the user electronic device 13. In this example, the additional active motion sensors are not required for the garment 11 but may still be provided.

The user interface 300 also includes representation of the activity data 303 received from the server 15. The representation of the activity data 303 in this example is the form of an object 303 that overlays the abdominal muscles of the wearer. The representation of the activity data 303 changes colour and/or size and/or shape depending on whether the activity data indicates that the abdominal muscles are in contraction or relaxation. In Figure 3, the abdominal muscles are in contraction and as such the object 303 has a dark colour. When the abdominal muscles are in relaxation the colour of the object 303 lightens. Of course, other visual representations of the activity data relating to the abdominal muscles may be provided.

The object 303 is displayed at a position determined according to the location of the fiducial marker on the garment 31. The fiducial marker that acts as a reference position for the garment 11 in relation to the wearer of the garment 11. The position of the object to be displayed is determined using the position of the marker (x1, y1) in the image and a predetermined displacement (x2, y2) from the marker to a feature of interest on the wearer such as the abdominal muscles. In particular, the position of the object 303 to be displayed can be determined as (x1, y1) + (x2, y2).

The user interface 300 of Figure 3 displays additional activity data for the wearer and other data for the garment 11 at positions which are not determined based on the location of the marker on the garment 11. The user interface 300 includes an ECG trace 305 and hear1rate data 307; the signal strength 309 for the communication unit of the garment 11; the battery level 311 for a battery of the garment 11; G PS coordinate data 313; core body temperature and skin surface temperature 315; the oxygen level 317, blood pressure and blood glucose levels 319, sleep tracking, step tracking and hydration level 321, and fat level, calories burned, blood lactate level as well as an indication of the type of calories burned 323. The user interface 300 also displays warnings 325, 327 indicating the wearer's V02 and hydration levels are concerning. Of course, the user interface 300 in Figure 3 is just one example interface and other forms of bio data may be displayed to the user in a different way.

Referring to Figure 4, there is shown an example method according to the present invention. Step 401 of the method comprises obtaining an image of the garment. Step 402 of the method comprises processing the image to determine the location of the fiducia I marker.

Referring to Figure 5, there is shown an example method according to the present invention.

Step 501 of the method comprises obtaining an image of the garment. Step 502 of the method comprises processing the image to determine the location of the fiducia I marker. Step 503 of the method comprises displaying a representation of the activity data.

At least some of the example embodiments described herein may be constructed, partially or wholly, using dedicated special-purpose hardware. Terms such as:component-, :module-or:unitused herein may include, but are not limited to, a hardware device, such as circuitry in the form of discrete or integrated components, a Field Programmable Gate Array (F PGA) or Application Specific Integrated Circuit (ASIC), which performs certain tasks or provides the associated functionality. In some embodiments, the described elements may be configured to reside on a tangible, persistent, addressable storage medium and may be configured to execute on one or more processors. These functional elements may in some embodiments include, by way of example, components, such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. Although the example embodiments have been described with reference to the components, modules and units discussed herein, such functional elements may be combined into fewer elements or separated into additional elements. Various combinations of optional features have been described herein, and it will be appreciated that described features may be combined in any suitable combination. In particular, the features of any one example embodiment may be combined with features of any other embodiment as appropriate, except where such combinations are mutually exclusive. Throughout this specification, the term 'comprising_ or 'comprises_ means including the component(s) specified but not to the exclusion of the presence of others.

Attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.

All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.

Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.

The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed. 1. 2. 3. 4. 5. 6. 7. 8.

Claims

13 CLAIMS A garment comprising: a sensor arranged to monitor the activity of the wearer of the garment a communication unit arranged to receive activity data for the wearer from the sensor and transmit the activity data to an external device; and a fiducial marker in the form of a 2D image located on an outside surface of the garment wherein the fiducial marker is arranged such that when imaged by an image capturing device, the fiducial marker is useable to determine position information for the garment A garment as claimed in claim 1, wherein the fiducial marker is an Augmented Reality (AR) marker.A garment as claimed in any preceding claim, wherein the fiducial marker comprises a code string identifying the garment encoded into a visual symbol, and wherein the fiducial marker is arranged such that when imaged by an image capturing device, the at least one fiducial marker is useable to access activity data associated with the sensor of the garment A garment as claimed in any preceding claim, wherein the fiducial marker comprises a plurality of fiducial markers, and wherein the plurality of fiducial markers are located at different locations on the garment.A garment as claimed in claim 4, wherein the plurality of fiducial markers are arranged in a geometric pattern.A garment as claimed in any preceding claim, wherein the fiducial marker is integrated into the garment A garment as claimed in any of claims 1 to 5, wherein the fiducial marker is printed onto the garment.A garment as claimed in any preceding claim, wherein the fiducial marker is incorporated into the stitching of the garment and/or a seam of the garment and/or a hem of the garment, and/or a neckline of the garment and/or a collar of the garment and/or a sleeve of the garment, and/or a cuff of the garment, and/or a pocket of the garment and/or a body of the garment and/or a fastener of the garment 9. A method comprising: obtaining an image of a garment according to any preceding claim; and processing the image to determine the location of the fiducial marker.10. A method as claimed in claim 9, further comprising: displaying a representation of the activity data on a display.11. A method as claimed in claim 10, wherein the position of the representation of the activity data on the display is determined according to the determined location of the fiducial marker.12. A method as claimed in claim 11, wherein the position of the representation of the activity data is determined by applying a predetermined displacement to a determined coordinate location of the fiducial marker.13. A method as claimed in any of claims 10 to 12, wherein the position of the representation of the activity data corresponds to the position of a feature of interest on a wearer of the garment.14. A method as claimed in any of claims 10 to 13, wherein the method comprises simultaneously displaying a representation of a wearer of the garment with the representation of the activity data on the display.15. A method as claimed in claim 14, wherein the representation of the activity data at least partially overlays the displayed representation of the wearer.16. A method a claimed in claim 14 or 15, wherein displaying the representation of the wearer of the garment comprises displaying the obtained image.17. A method as claimed in claim 14 or 15, wherein displaying the representation of the wearer of the garment comprises displaying an avatar representation of the wearer.18. A method as claimed in any of claims 10 to 17, wherein the representation of the activity data represents a physiological state of the wearer.19. A method as claimed in any of claims 10 to 18, wherein the activity data comprises activity data related to a muscle or muscle group of a wearer of the garment, wherein the position of the representation of the activity data is determined to correspond to an estimated location of the muscle or muscle group of the wearer as determined from the location of the fiducial marker, and wherein the method comprises simultaneously displaying a representation of the wearer with the representation of the activity data, and wherein the representation of the activity data is displayed such that it overlays the representation of the wearer at the position corresponding to the estimated location of the muscle or muscle group of the wearer.20. A method as claimed in any of claims 10 to 19, wherein the activity data comprises cardiac activity data, wherein the position of the representation of the activity data is determined to correspond to an estimated location of the heart of a wearer of the garment as determined from the location of the fiducial marker, wherein the method comprises simultaneously displaying a representation of the wearer with the representation of the activity data, wherein the representation of the activity data is displayed such that it overlays the representation of the wearer at the position corresponding to the estimated location of the heart of the wearer.21. A method as claimed in any of claims 10 to 20, wherein the representation of the activity data is in the form of an augmented reality object 22. A computer program comprising instructions which, when the program is executed by a computer, causes the computer to carry out the method as claimed in any of claims 9 to 21.23. A computer readable storage medium comprising instructions which, when executed by a computer, cause the computer to carry out the method as claimed in any of claims 9 to 21.24. An electronic device operable to perform the method as claimed in any of claims 9 to 21.25. A method of manufacturing a garment according to any of claims 1 to 8, wherein the method comprises incorporating a fiducial marker in the form of a 2D image onto an oulside surface of the garment