CN111788827A

CN111788827A - System and method for remotely activating storage operation of picture information

Info

Publication number: CN111788827A
Application number: CN201880082937.4A
Authority: CN
Inventors: 伊娃·波基宁; 比约恩·伯恩曼; 提姆·迈科拉; 玛丽亚·佩卡琳宁; 迈克尔·米耶蒂宁; 米科·阿尔斯特罗姆; 埃里克·林德曼
Original assignee: Amer Sports Digital Services Oy
Current assignee: Songtuo Co
Priority date: 2017-12-22
Filing date: 2018-12-21
Publication date: 2020-10-16
Also published as: WO2019122535A1; FI20205646A1; GB2583424A; DE112018006553T5; GB202010163D0

Abstract

The invention relates to a system and a method for remotely activating a storage operation of picture information. According to the invention, the system comprises a wearable sensor device comprising at least one sensor providing a sensor signal, a processing unit for running a computer program, a first memory unit for storing instructions of the computer program, and a wireless signaling unit for communicating with an external device over a wireless link. The system further comprises at least one second digital device comprising recording means adapted to be set into a mode for continuously capturing picture information, a second storage unit, and a wireless signaling system for communicating with external devices via a wireless link. The processing unit in the wearable sensor device is adapted to send a command over the wireless link to the second digital device by unidirectional transmission to trigger the storage of at least a part of the continuously captured picture information in the memory of the at least one second device in response to the command.

Description

System and method for remotely activating storage operation of picture information

Technical Field

The invention relates to a system and a method for remotely activating a storage operation of picture information.

More particularly, the present invention relates to personal wearable sports devices in which a user wishes to capture picture information in the form of video clips of performances and situations and store them for later viewing, editing and sharing.

Background

Various methods are known to address the problem of recording, editing, viewing and sharing video information with personal devices. One such method is proposed in us patent 8613937, which discusses managing broadcast and received video information with a mobile device. The content is not generated or edited in any way by the user, but the content itself is provided with filtering and bookkeeping functions.

Another approach is shown in us patent 8214139, where a navigation device is configured to trigger various actions based on GPS positioning, identified changes in position or acceleration. However, such recording devices are triggered only by position data, and the length of the segments is determined by external conditions.

Another approach is shown in us patent application 2013/0343729, in which a system for semi-automatic video editing is discussed. The system is based on an algorithm that evaluates and classifies the provided video content, thereby providing a compiled and edited version of the input material, which includes a selected sequence of the original video material based on motion, facial expression, etc.

In sports and outdoor activities, it is often desirable to collect memory in the form of video clips, for example, in a performance or mountain-climbing trip. Cameras that can take such clips are well known, including cameras built into smartphones and PDAs. Editing such video material afterwards is time consuming and cumbersome. Also, during the training process, it is important for the trainee and/or trainer to record certain sequences of the performance (which may be performed many times) for later analysis. For long video sequences, it is not easy to find, isolate and view critical performance steps, which may only be a fraction of a second in duration.

There is therefore a need for a system that can take video clips only when needed, without requiring significant effort by the user and without having to fix the camera in place. In addition, in the case where video clips must be of a certain length and have a timeline around a previously known trigger event, it is also desirable to keep the necessary edits to a minimum, making them easy to browse for acceptance or rejection.

Disclosure of Invention

It is therefore an object of the present invention to propose a solution to the above mentioned problems based on having a wireless connection between two independent devices and providing a solution based on sensors connected to one or both devices. The system, method and apparatus of the present invention provides an efficient solution for collecting only relevant video segments around a triggering event along any kind of exercise or trip. The video clips so collected are easily linked together to tell a "complete" story, or simply browsed to select the most appropriate video clip for immediate sharing or editing over a network.

According to a first aspect of the invention, the inventive system for remotely activating a storing operation of picture information comprises a wearable sensor device comprising at least one sensor providing a sensor signal, a processing unit for running a computer program, a first storage unit for storing instructions of said computer program, and a wireless signaling unit for communicating with an external device over a wireless link. It further comprises at least one second digital device comprising recording means adapted to be set into a mode for continuously capturing picture information, a second memory unit, and a wireless signaling system for communicating with external devices via a wireless link.

The processing unit in the wearable sensor device is adapted to send a command to the second digital device over the wireless link by unidirectional transmission based on the sensor signal in order to trigger storage of at least a part of the continuously captured picture information in a memory of the at least one second device in response to the command.

It should be understood that the command may be generated in any manner in which the sensor is detecting a desired trigger event for storing picture information. Such sensors included in the device may track motion by measuring acceleration, track orientation by magnetometers, track position by GPS sensors, track altitude or changes in altitude by barometric sensors, etc. The sensor device may also have a timer function. Naturally, the location of the sensor device may be selected according to other actions during the athletic training or performance that will result in the desired command to be sent over the wireless link.

The sensor device may be a sensor module that is removably attached to the user's clothing or equipment, integrated into the clothing worn by the user, integrated into the user's shoes or other athletic equipment.

For example, the second device may be one or more wearable digital cameras, or a smartphone equipped with at least one digital camera.

In some embodiments, the second device is adapted to store the captured picture information as a video clip in its memory a predetermined period of time before and/or after receiving the store command.

In some embodiments, the sensor device has a programming interface that enables connection to an external computing device. The external device may be a mobile phone, a wrist computer (smart watch) or a desktop computer and has a user interface for adding and/or modifying computer program instructions and/or parameters for the wearable sensor device. The edited or added instructions and/or parameters are then stored in the first storage unit.

In some embodiments, the external computing device comprising the programming interface may be the same second digital device comprising the recording apparatus. In this case, the external computing device may be a wearable digital camera or a mobile phone.

In some other embodiments, the wearable sensor device comprises at least a 3D acceleration sensor, and/or an electromagnetic sensor for 3D detection of the direction of the earth's magnetic field.

The terms "first memory cell" and "second memory cell" should not be construed as only a single memory circuit. One or both of these storage units may be interchangeable memory cards, such as SD cards. The first and/or second storage unit may also be an individually addressable part, file or area of a larger storage space.

According to a second aspect of the present invention, there is provided a method of activating a storage operation of picture information, comprising the steps of:

-providing a wearable sensor device comprising at least one sensor providing a sensor signal, a processing unit for running a computer program, a first memory unit for storing instructions of the computer program, and a wireless signaling unit for communicating with an external device over a wireless link;

-providing at least one second digital device comprising recording means adapted to be arranged to continuously capture picture information, a second storage unit, and a wireless signaling system for communicating with external devices via a wireless link;

-generating a command in the wearable device based on the sensor signal to instruct storing picture information in the second device;

-transmitting the command to the second device over the wireless link by unidirectional transmission;

-receiving said command in said at least one second device and triggering, in response to said command, the storage of at least a part of said successively captured picture information in a memory of said at least one second device.

The method of the invention may comprise the further step of: storing the captured picture information as video clips of a predetermined length in the at least one second device, wherein each clip is captured a predetermined period of time before and/or after issuing the storage command.

The method of the present invention may further comprise the steps of: adding and/or modifying computer program instructions and/or parameters by an external computing device having a user interface for the wearable sensor device and by means of a programming interface in the sensor device and storing the instructions and/or parameters in the first storage unit.

The present invention brings significant advantages as an effective solution for collecting only relevant video segments around a triggering event along any kind of exercise or travel. The collected video clips are linked together telling a "complete" story of the event, but can also be easily browsed to select the most appropriate clip, for example for immediate sharing or editing over a network.

With the present invention, the user need only spend less time editing the clip, capturing the moment he or she wants to save. The inventive concept also saves memory on the memory cards typically used in digital cameras. By managing the recording of the segments using pre-created or home-made applications, the user himself can define the conditions under which the recording takes place.

An essential feature of the invention is that the recording means are adapted to be in a mode for continuously capturing picture information. After the camera is turned on, it captures and saves a certain amount of video clips to memory, where new clips erase old ones, just like an endless tape recording. Only when a command is issued to start storing the captured picture information will these be permanently stored in the memory of the camera. This facilitates storage of video material captured immediately before and after the storage command is issued. The recording period, which may obviously be set by the user and depends to a large extent on the nature of the event, may use all of the time of the period to store the video signal until a storage command is issued, may be centred on the storage command, may start from the storage command or any combination thereof.

For the purposes of description, in this context, the terms "recording" and "capturing" are used synonymously and both describe the process of recording a video clip in a recording device that is in a continuous recording mode, at least temporarily. The term "store" and all derivatives thereof (including nouns thereof) are used for video segments or video clips, which are in fact permanently stored for later viewing, editing and/or sharing.

The wireless communication system providing the wireless link may be based on radio technology such as bluetooth or RFID, or any short-range communication system.

Drawings

Figure 1 shows the main components of the system of the present invention.

Fig. 2 shows the wrist computer and camera unit according to the invention in more detail.

Fig. 3 shows an example when a user carries the system of the invention.

Figure 4 shows an example of the system of the invention in which one component of the system is stationary.

Figure 5 shows a schematic view of a video clip recorded according to the invention.

Figure 6 shows a flow chart of a process of storing video clips according to the invention.

Fig. 7 shows another example of the system of the present invention when carried by a user.

Figure 8 shows the main components of the system of the present invention.

Figure 9 shows in more detail a sensor unit suitable for use in the system of the invention.

Detailed Description

The main components of one embodiment of the system of the present invention are shown in fig. 1: a wearable sensor device 1, a unit 2 containing a camera, and an external computing device 3. All connections between these devices need not be two-way communications. The wearable sensor device 1 only sends commands to the camera unit 2 and does not receive any information from the camera unit 2.

A general purpose computer or a service accessed from the internet through a computer may provide a programming interface for the wearable sensor device 1. In some embodiments and if so equipped, an important task of the programming interface in the computing device 3 or camera unit 2, in addition to the apparent configuration data input requirements, is to allow the input, setting or editing of computer program instructions and/or parameters for various applications running in the wearable sensor device. These applications depend on the available sensors and the needs of the user and the parameters may typically be a sensor value trigger level for activating the camera unit 2, a video clip recording time, etc.

It is clear that the two-way communication between the computing device 3 and the wearable sensor device 1 facilitates the use of a programming interface on the computing device 3 that can be used for editing predefined applications running in the wearable sensor device 1 or for adding new applications. It is also within the scope of the invention to store the data and customize the view in a format that can be transferred as a data file to other similar devices or social media or a remote service on, for example, the internet for bookkeeping and further processing.

The wearable sensor device 1 and the camera unit 2 are shown in more detail in fig. 2. The wearable sensor device 1 has a processing unit 21 for running computer programs and applications. The user interface unit 22 may receive manual commands (on/off, start, reset, etc.) entered by a user, for example, via buttons 26. A first storage unit 23 is provided for storing an operating system, application program code, and instructions and parameters. Sensor interface 24 provides a wired connection to one or more built-in sensors (not shown). Typically, the sensor may be an accelerometer, gyroscope or other direction detection switch (e.g., compass), timer, GPS device, shock sensor, inclinometer, or the like.

The wireless signaling unit 25 is adapted to send a one-way communication command to the camera unit 2 over a wireless link, as indicated by arrow L. This command triggers the storage of at least a part of the continuously captured picture information in the second memory unit of the camera unit 2.

The wireless communication protocol may be Bluetooth LE or a proprietary ANT + protocol. They use Direct Sequence Spread Spectrum (DSSS) modulation techniques and adaptive isochronous network configurations, respectively. The necessary description of the necessary hardware for various implementations of the wireless link may be derived, for example, from

Including IC circuits and associated hardware configurations for protocols operating in the sub-1 GHz and 2.4GHz bands, e.g. ANT^TM、

Low-energy-consumption RFID/NFC and Purpath^TMWireless audio frequency,

IEEE 802.15.4、ZigBee RF4CE、6LoWPAN、

And a GPS.

The wireless signaling unit 25 may also provide a programming interface to enable bi-directional connection with the external computing device 3, the external computing device 3 having a user interface for adding and/or modifying computer program instructions and/or parameters for the wearable sensor device, as described above. The instructions and/or parameters are stored in the first memory unit 23. The camera unit 2 may have a built-in required programming interface, which may be used by the wearable sensor device 1 by means of a wired or wireless connection.

In fig. 3 is shown a snowboarder having a wearable sensor device 30 attached to his wrist and a camera 31 attached to his forehead by some suitable fastener. Obviously, the camera may be attached to any part of the clothing, or on a snowboard. The wireless link L provides wireless communication from the device 30 to the camera 31. When the ground speed, vertical speed or acceleration (on a steep slope) exceeds a certain limit, or when the gravity (without vertical acceleration) is zero or below a certain limit (which means that the skier skips in the air), the wearable sensor device 30 will send an instruction to the camera 31 to start storing the video clip. The trigger function may be based on any physical variable that the sensor may detect, and the trigger rules may be built by the editing function to take into account any combination of these variables, as will be explained in the examples that follow. The design and editing software of the trigger is known in the art and is stored, for example, in an external computing device 3 as shown in fig. 1, or in a camera unit 2, for example a mobile phone equipped with a camera and a programming interface application for a wearable sensor device 30.

During the performance, the camera 31 interprets the received command signal and starts the storage of picture information.

The use of the system of the invention in an embodiment relating to downhill skiing is shown in fig. 4, where the camera 41 is stationary and a wearable sensor device 40 attached to the wrist (or other part) of the user is operable to activate the camera 41 via a wireless link L in order to store the segments as the user approaches or passes the line of sight of the camera. In this way, repeated segments may be taken for training and comparison purposes. It is clear that within the scope of the invention any number of cameras may be placed at a distance or at different angles to each other relative to the performance site or along the route. The triggering of the camera may be manual or automatic, for example using proximity sensing. Conditions at certain points of the performance (e.g., at a takeoff ramp) easily create situations that can cause sensors in wearable sensor device 41 to trigger a camera to store an event. Other points of performance to be monitored (e.g., on sailboats) are more likely to be manually or nearly triggered.

Fig. 5 is a schematic and exemplary representation of video segments VC1 through VC6 stored in semiconductor or magnetic memory. Thumbnail icons T1-T6 displaying the contents of each video clip can be viewed to immediately decide how to process each clip. Of course, various editing techniques exist, and management techniques that specifically handle video clips are not within the scope of the present invention.

Fig. 6 shows a flow chart of a basic video clip storage procedure according to the present invention. In step 60, the wearable sensor device 1 of fig. 2 is monitoring a sensor signal. If the input signal at test 61 exceeds a preset trigger threshold for starting to store a video clip, a command for this purpose is issued in step 62 and transmitted to the camera unit 2 in step 63. In this example, the camera unit records a next 15 second video clip and stores it in a video clip together with the captured previous 15 seconds of video, as shown in fig. 5. It will be apparent and equally good that the entire length of the clip can be stored starting from the video material captured before the command is issued and then stopping at the command. Vice versa, the entire length of the clip can be stored starting from the video material captured after the command is issued and then stopping after a predetermined time.

Examples of the invention

1. Skiing stunts

The user wants to record his maximum jump/trick. After each successful jump, when button 26 is pressed, the recorded video clip 30 seconds before the button is pressed is stored. The user may pre-define the length of the stored segments.

//if user is on moving and in free fall for longer that 2seconds:record a movie clip 30sec before and 30after.

if(SUUNTO_SPEED>10&&SUUNTO_G[2]<1){

ACTIVATE.CAMERA_AFTERTHOUGHT(30)；

clipsrecorded＝clipsrecorded+1；

//show how many clips have been recorded

RESULT＝clipsrecorded；

}

2. Using fixed and mobile devices

Here, the user wishes to obtain a short clip without the need or the impossibility of manipulating the wearable sensor device in one operation. Proximity determination may be based on signal strength sensing, which may also be based on location using GPS. For example, the Bluetooth Low Energy (BLE) standard has a proximity sensing function. Other signal strength based options include ultrasonic sensing, for example in underwater applications or short range induction wireless (telemetry) devices. In location based proximity sensing, both the wearable sensor device and the camera may have GPS functionality, or only the device in motion, provided the location of the stationary device is fed into the GPS navigator.

Examples of where useful include skiing with a head mounted camera, by a diver securing the camera, by a sailboat turning a buoy. It is also feasible to shoot skillets with cameras mounted on the rails, for example by using the following codes:

//If user is approaching the camera start filming.

if(SUUNTO_PROXIMITY<15&&recording＝＝0){

ACTIVATE.CAMERA_RECORD()；

recording＝1；

//when user is gone,stop recording

}else if(SUUNTO_PROXIMITY>15&&recording＝＝1){

ACTIVATE.CAMERA_STOP()；

recording＝0；

}

3. mountain bike

The user wants to photograph the downhill road of mountain bike expedition (keep high speed). He wants to automatically control the camera when he cannot remove his hand from the handlebar.

if(SUUNTO_SPEED>30&&recording＝＝0){

ACTIVATE.CAMERA_RECORD()；

recording＝1；

}else if(SUUNTO_SPEED<20&&recording＝＝1){

ACTIVATE.CAMERA_STOP()；

recording＝0；

}

In such a path, the user may wish to record the best view, sight, jump, etc. Here, buttons of the wearable sensor device may be used to bookmark the attraction for future editing. Bookmarks may be saved as short clips to camera memory to allow for faster editing.

Referring to fig. 7-9, another embodiment of the system and method of the present invention for remotely activating a storage operation for picture information is shown and described herein, as follows.

The system of the invention as used by the person 70 in fig. 7 comprises

wearable sensor devices

71, 72 and/or 73, which may be integrated in equipment, such as shoes (sensor 71), clothing (sensor 72) or be detachably worn on the body (sensor 73), or be placed in a pocket (not shown). If the sensors 71-73 comprise acceleration sensors, the position of the person or piece of athletic equipment may preferably be selected based on other actions during the athletic training or performance that will result in a signal to be sent to a digital recording device (here represented as a smartphone 74 mounted on a joystick 75) via a wireless link 76. In response to such a command, the camera in the device 74 will be triggered to store a predetermined portion of the continuously captured picture information in its memory (second storage unit). Obviously, as shown in FIG. 3, the camera 74 may also be carried on the person 70.

The sensor devices 71-73 comprise at least one sensor. The sensors included in the device may track motion by measuring acceleration, track orientation by magnetometers, locate by GPS sensors, track altitude or changes in altitude by barometric sensors. The sensor device may also have a timer function, which may send one or a few commands intermittently at a predetermined time, or may delay the sending of commands with a predetermined time delay after the occurrence of a triggering event.

The receiving device 74 may perform further calculations based on commands received over the wireless link. If the commands are sent sequentially, e.g., based on a timing function, or asynchronously when a sequential trigger event occurs, the receiving device may measure the received signal strength and begin storing the continuously captured picture information when, for example, the signal strength reaches a predetermined threshold level. For example, similar location-based calculations may be made based on a GPS sensor that is configured to send a command when a particular location is reached.

As explained in connection with fig. 1, a programming interface on a separate computing system or built into the camera 74 may be used to edit applications running in the wearable sensor device 74. Such a programming interface is, for example, a piece of software that has the capability to: the wired or

wireless interface

25, 93 of the wearable sensor device is controlled to access a first storage unit (denoted by

reference numerals

23 and 92 in fig. 2 and 9, respectively) in the wearable sensor device and to store the additions/modifications made in the first storage unit.

Referring to fig. 8, the system of the invention is shown to include a wearable sensor device 80 (where it is attached to a chest strap 81), a unidirectional wireless link 82 and a recording device 83.

The sensor device will now be described in more detail in connection with fig. 9. The sensor device 90 comprises at least one sensor 91, a processing unit 94 for running a computer program, a first memory unit 92 for storing instructions for the computer program, and a wireless signaling unit 93 for communicating with external devices over a unidirectional wireless link 95. The processing unit 94 is adapted to send a command to the second

digital device

74, 83 over the wireless link 95 based on the sensor signal received from the sensor 91 to trigger the storage of at least a part of the continuously captured picture information in the memory of the second digital device in response to said command.

According to some embodiments, the sensor device is a sensor module that is removably attached to a user's clothing or equipment. According to some embodiments, the sensor device is a sensor module integrated in a garment worn by the user. According to some other embodiments, the sensor device is a sensor module integrated in a shoe of the user. According to some embodiments, the sensor device may also be a sensor module integrated into the athletic equipment used by the user.

According to some embodiments, the second digital device is a wearable digital camera 83. According to some embodiments, the second digital device is a smartphone 74 equipped with at least one digital camera. According to some embodiments, the second device may be more than one digital camera.

According to the invention, the second digital device may be adapted to store the captured picture information as a video clip in its memory a predetermined period of time before and/or after receiving the storage command, as explained in connection with fig. 6.

According to the method of the invention, the activation of the operation of storing the picture information comprises the following steps:

-providing a wearable sensor device 71-73, 80, 90 comprising at least one sensor 91 providing a sensor signal, a processing unit 94 for running a computer program, a first memory unit 92 for storing instructions for the computer program, and a wireless signaling unit 93 for communicating with an

external device

74, 83 over a

wireless link

76, 82, 95;

-providing at least one second

digital device

74, 83 comprising recording means adapted to be arranged to continuously capture picture information, a second storage unit, and a wireless signaling system for communicating with external devices via a wireless link;

-generating a command in the wearable sensor device 71-73, 80, 90 based on the sensor signal to instruct storing picture information in the

second device

74, 83;

-transmitting said command to said second device via said

wireless link

76, 82, 95 by means of a one-way information transmission;

-receiving said command in said at least one

second device

74, 83 and triggering, in response to said command, the storage of at least a part of said successively captured picture information in the memory of said at least one second device.

Here, it is assumed that the default second

digital recording device

74, 83 has a second storage unit in order to capture and store selected picture information in a predetermined manner when instructed, for example as a clip as discussed in connection with fig. 5 and 6. Thus, the captured picture information can be stored as a video clip of a predetermined length. Thus, each clip may be captured for a predetermined period of time before and/or after the storage command is issued.

It is to be understood that the disclosed embodiments of the invention are not limited to the particular systems and process steps disclosed herein, but may be extended to equivalents thereof as recognized by those of ordinary skill in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.

In addition, reference may be made herein to various embodiments and examples of the invention and alternatives for various components thereof. It should be understood that such embodiments, examples, and alternatives are not to be construed as actual equivalents of each other, but are to be considered as independent and autonomous representations of the present invention.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Numerous specific details are provided, such as examples of lengths, widths, shapes, etc., to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

While the above examples illustrate the principles of the invention in one or more particular applications, it will be apparent to those of ordinary skill in the art that numerous modifications in form, usage and implementation details may be made without departing from the principles and concepts of the invention. Accordingly, the invention is to be limited only by the claims as set forth below.

Claims

1. A system for remotely activating a storage operation of picture information, comprising:

-a wearable sensor device comprising at least one sensor providing a sensor signal, a processing unit for running a computer program, a first storage unit for storing instructions of the computer program, and a wireless signaling unit for communicating with an external device over a wireless link;

-at least one second digital device comprising recording means adapted to be set into a mode for continuously capturing picture information, a second memory unit, and a wireless signaling system for communicating with external devices via a wireless link,

wherein the processing unit in the wearable sensor device is adapted to send a command to the second digital device over the wireless link by unidirectional transmission based on the sensor signal in order to trigger storage of at least a part of the continuously captured picture information in a memory of the at least one second device in response to the command.

2. The system of claim 1, wherein the command is generated by a sensor signal that tracks a motion, proximity, or location of a user carrying the wearable sensor device.

3. The system of claim 2, wherein the sensor device is a sensor module that is removably attachable to a user's clothing or equipment.

4. The system of claim 2, wherein the sensor device is a sensor module integrated into a garment worn by the user.

5. The system of claim 2, wherein the sensor device is a sensor module integrated in a user's shoe.

6. The system of claim 2, wherein the sensor device is a sensor module integrated in athletic equipment used by the user.

7. The system of any of claims 1 to 6, wherein the second device is a digital camera.

8. The system according to any one of claims 1 to 6, wherein the second device is a smartphone equipped with at least one digital camera.

9. The system of any of claims 1 to 6, wherein the second device comprises at least one digital camera.

10. System according to any of claims 1 to 9, characterized in that the at least one second device is adapted to store the captured picture information as a video clip in its memory a predetermined period of time before and/or after receiving a store command.

11. System according to any of claims 1 to 10, characterized in that the sensor device has a programming interface connectable to an external computing device having a user interface for adding and/or modifying computer program instructions and/or parameters for the wearable sensor device and storing the instructions and/or parameters in the first memory unit.

12. The system of any of claims 1-10, wherein the external computing device comprising the programming interface is a mobile phone.

13. The system of any of claims 1-10, wherein the external computing device comprising the programming interface is a wrist-mounted computer.

14. The system of any of claims 1-10, wherein the external computing device comprising the programming interface is a desktop computer.

15. The system of any of claims 11 to 14, wherein the external computing device comprising the programming interface and the second digital device comprising a recording apparatus are the same device.

16. The system of claim 15, wherein the external computing device comprising the programming interface is a wearable digital camera or a mobile phone.

17. The system according to any one of claims 1 to 15, characterized in that the wearable sensor device comprises at least a 3D acceleration sensor.

18. The system according to any one of claims 1 to 15, characterized in that the wearable sensor device comprises an electromagnetic sensor for 3D detection of the direction of the earth's magnetic field.

19. A method of activating a storage operation of picture information, comprising the steps of:

-providing a wearable sensor device comprising at least one sensor providing a sensor signal, a processing unit for running a computer program, a first storage unit for storing instructions of the computer program, and a wireless signaling unit for communicating with an external device over a wireless link;

-providing at least one second digital device comprising recording means adapted to be arranged to continuously capture picture information, a second memory unit, and a wireless signaling system for communicating with external devices via a wireless link;

20. The method of claim 19, comprising the steps of: storing the captured picture information as video clips of a predetermined length in the at least one second device, wherein each clip is captured a predetermined period of time before and/or after issuing the storage command.

21. A method according to claim 19 or 20, characterized in that it comprises the steps of: adding and/or modifying computer program instructions and/or parameters by an external computing device having a user interface for the wearable sensor device and by means of a programming interface in the sensor device and storing the instructions and/or parameters in the first storage unit.