CN115097973A - Desktop holographic display all-in-one machine device, method, computer program product and storage medium - Google Patents

Abstract

The invention discloses a desktop holographic display all-in-one machine, which comprises: the holographic display device body is used for integrating the infrared optical motion capture unit and the holographic display unit in structure and function; the interaction control unit comprises holographic tracking glasses and an interaction control pen, and is used for providing watching and controlling holographic 3D content and watching a display picture through the holographic tracking glasses; and the computing unit is used for operating the holographic content and the motion capture software, and different computing units can be flexibly configured according to the complexity of the operated holographic content. The desktop all-in-one machine equipment is provided with the independent computing unit, so that the equipment is more flexible to use, can adapt to various different application scenes, continuously updates the iterative computing unit according to the requirements of different contents, simultaneously combines the binocular high-speed infrared optical motion capture camera and the 3D display screen, adds the IMU position and pose sensor, and can also ensure the accurate stability of the output of infrared optical motion capture data.

Description

Desktop holographic display all-in-one device, method, computer program product and storage medium

technical field

The present invention relates to the field of display, in particular to a desktop holographic display integrated machine device, method, computer program product and storage medium.

Background technique

Holographic display technology (Front-Projected Holographic Display), also known as virtual imaging technology, is a technology that uses the principles of interference and diffraction to record and reproduce the real three-dimensional image of an object. , glasses and other auxiliary devices for viewing the advantages of three-dimensional images. With the continuous development of display technology, holographic display technology has gained more and more attention.

At present, desktop-level 3D display systems on the market mostly use the principle of polarized display, and the display brightness is not enough, and most of the products use a split structure, and the optical motion capture positioning part is separated from the display carrier, which is troublesome to install and use, and is unstable. In the current integrated products in the market, most of the products adopt the integrated design of the computing unit and the display, and the configuration of the computing unit is fixed, which is not conducive to changing the configuration according to different usage scenarios. Aiming at the above defects, the present invention proposes a desktop integrated holographic display device, which not only satisfies the integration of the motion capture device and the display, but also avoids the problem of fixed computing units and limiting user usage scenarios.

SUMMARY OF THE INVENTION

In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a desktop holographic display all-in-one device, method, computer program product and storage medium to adapt to various application scenarios, and to continuously update and iterate according to the needs of different contents computing unit.

In view of this, the first aspect of the present application provides a desktop holographic display all-in-one device, including: a holographic display device main body, which is used to integrate the infrared optical motion capture unit and the holographic display unit into one in structure and function, the said The infrared optical motion capture unit and the holographic display unit are powered by a common motherboard. The main body of the holographic display device has a built-in IMU module with gravity sensing. When the device is tilted, it can sense the tilt angle of the device and output the tilt angle of the device to the holographic content in real time. Real-time adjustment of the displayed screen;

The interactive control unit, including holographic tracking glasses and an interactive control pen, is used to provide viewing and control of holographic 3D content, and to view the display screen through the holographic tracking glasses. The display screen is synchronized, and the left and right eye images are displayed at intervals, resulting in a three-dimensional visual effect;

The computing unit is used for running the holographic content and motion capture software, and different computing units can be flexibly configured according to the complexity of the running holographic content.

The infrared optical motion capture unit includes an infrared optical binocular capture camera. The infrared optical binocular capture camera is located at the upper end of the holographic display unit and is used to capture the position information of the holographic tracking glasses in real time, and determine whether the holographic tracking glasses are in the Capture the range to adjust the state of the holographic display device in real time.

When the holographic tracking glasses appear in the capture area, the holographic screen is displayed in 3D mode, and when the holographic tracking glasses leave the capture area, the holographic screen is displayed in 2D mode.

The holographic display unit is composed of an active stereoscopic display screen body and a holographic control module, and the holographic control module includes a pose sensor, a 3D signal transmitter, and a power supply module.

The active stereoscopic display screen adopts a high refresh rate LED screen body, and the holographic control module controls the display screen and display frequency of the screen body, and is connected to the holographic tracking glasses through a 3D signal transmitter to control the switch and display screen of the left and right glasses of the glasses. The frequencies are the same to form a 3D image within the viewer's field of view.

The interactive control unit operates and controls the displayed virtual object through an interactive control pen. The interactive control pen is composed of an optical marker and an IMU sensor, and is used to capture the optical marker on the interactive control pen and obtain IMU information through an infrared optical motion capture unit. Interactively control the position information of the pen in space and transmit the information to the holographic content.

A second aspect of the present application provides a desktop holographic display method, including:

Obtain the three-dimensional position information of the holographic tracking glasses and the interactive control pen in the motion capture space through the infrared optical motion capture unit located at the upper end of the holographic display unit, and determine whether the holographic tracking glasses are within the capture range. When the holographic tracking glasses appear in the capture area, The holographic screen is displayed in 3D mode, otherwise, it is displayed in 2D mode; at the same time, the three-dimensional position information of the holographic tracking glasses and the interactive control pen and the inclination angle of the holographic display unit are transmitted to the computing unit;

Synchronizing the three-dimensional position information of the holographic tracking glasses and the interactive control pen in the motion capture space to the holographic display unit, and operating and controlling the displayed virtual object through the interactive control pen;

According to the tilt angle of the holographic display unit, the three-dimensional position information of the holographic tracking glasses and the interactive control pen in the motion capture space, the display angle of the screen is adjusted in real time to display the holographic stereoscopic screen corresponding to the user's perspective.

The holographic display unit is integrated with a pose sensor, and the user can adjust the inclination angle of the display screen according to his own sitting posture and height. With the inclination of the screen body, the inclination angle of the screen body is measured in real time, so as to adjust the display angle of the screen in real time.

A third aspect of the present application provides a non-volatile computer-readable storage medium storing computer-executable instructions, the computer-executable instructions being executed by one or more processors , the one or more processors can be caused to perform the method described in the second aspect and any one possible implementation manner of the second aspect.

A fourth aspect of the present application provides a computer program product, wherein the computer program product includes a computer program stored on a non-volatile computer-readable storage medium, the computer program includes program instructions, and when the When the program instructions are executed by the processor, the processor is caused to execute the method described in the second aspect and any possible implementation manner of the second aspect.

The application provides a desktop holographic display all-in-one device, including: a holographic display device main body for integrating an infrared optical motion capture unit and a holographic display unit in structure and function, the infrared optical motion capture unit and the holographic display unit. The display unit is powered by a common motherboard. The main body of the holographic display device has a built-in IMU module with gravity sensing. When the device is tilted, the tilt angle of the device can be sensed, and the tilt angle of the device can be output to the holographic content in real time to adjust the displayed screen in real time; interaction; The control unit, including holographic tracking glasses and an interactive control pen, is used to provide viewing and control of holographic 3D content, and to view the display screen through the holographic tracking glasses, which adopt active stereo technology, and control the switching and display of the left and right glasses. The picture is synchronized, and the left and right eye pictures are displayed at intervals, resulting in a visual stereo effect; the computing unit is used to run the holographic content and motion capture software, and different computing units can be flexibly configured according to the complexity of the running holographic content. Through this solution, compared with similar products on the market, it has an independent computing unit, which makes the device more flexible to use, can adapt to various application scenarios, and continuously update the iterative computing unit according to the needs of different contents. The motion capture camera is combined with the 3D display screen and the IMU pose sensor is added to form an integrated body, which is easy to operate and can also ensure the accurate and stable output of infrared optical motion capture data.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a structural diagram of a desktop holographic display all-in-one device provided by the present invention;

2 is a flowchart of a desktop holographic display method provided by the present invention;

3 is a schematic diagram of a desktop holographic display device provided by the present invention;

Detailed ways

Embodiments of the present application provide a holographic display method, system, computer program product and storage medium, so as to improve the effect of holographic display.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. In this application, "at least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) of a, b or c, can represent: a, b, c, a and b, a and c, b and c or a and b and c, where a, b and c can be It can be single or multiple. It is worth noting that "at least one item(s)" can also be interpreted as "one item(s) or more(s)".

It should be noted that, in this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiment or design described in this application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

The descriptions of the first, second, etc. appearing in the embodiments of the present application are only used for illustration and distinguishing the description objects, and have no order. any limitations of the examples.

Most of the existing desktop-level 3D display systems use a split structure, and the optical motion capture positioning part is separated from the display carrier, which is troublesome to install and use and unstable. In the current integrated products in the market, most of them adopt the integrated design of the computing unit and the display, and the configuration of the computing unit is fixed. The present application avoids the above problems, and proposes an all-in-one desktop holographic display device, that is, the display unit and the motion capture unit are fixed together, and the computing unit can be replaced at any time according to requirements.

Example 1:

The present application provides an all-in-one desktop holographic display device, please refer to FIG. 1 , the device 100 includes:

The main body 101 of the holographic display device is used to integrate the infrared optical motion capture unit 1011 and the holographic display unit 1012 in structure and function. The infrared optical motion capture unit 1011 and the holographic display unit 1012 are powered by a common motherboard. The built-in IMU module with gravity sensing can sense the tilt angle of the device when the device is tilted, and output the tilt angle of the device to the holographic content in real time to adjust the displayed screen in real time;

The infrared optical motion capture unit 1011 includes an infrared optical binocular capture camera. The infrared optical binocular capture camera is located at the upper end of the holographic display unit 1012 and is used to capture the position information of the holographic tracking glasses in real time, and determine whether the holographic tracking glasses are in the Capture the range to adjust the state of the holographic display device in real time.

Specifically, the main body 101 of the holographic display device combines the infrared optical binocular capture camera with the 3D display screen body, and adopts a common motherboard power supply design, and the binocular camera and the 3D display screen body use the same power supply. The main body 101 of the holographic display device has a built-in IMU module with gravity sensing, which can sense the tilt angle of the device when the device is tilted, output the tilt angle of the device to the holographic content in real time, and adjust the displayed screen in real time. The infrared optical camera on the upper part of the holographic display unit 1012 captures the holographic tracking 3D glasses in real time, and adjusts the state of the holographic display device in real time by judging whether the holographic tracking 3D glasses are within the capture range through the capture result. When the holographic tracking glasses 1021 appear in the capture area, the screen is displayed in 3D mode. When the holographic tracking glasses 1021 leave the capture area, the picture is displayed in 2D mode.

The main body 101 of the holographic display device and the computing unit 103 transmit the data captured by the optical camera and the data obtained by the pose sensor to the computing unit through the USB cable, and the processed data is transferred to the holographic content, thereby completing the interactive control and holographic 3D viewing .

The infrared optical motion capture unit 1011 adopts passive infrared optical motion capture, and this part provides the function of motion capture and positioning. Two high-speed infrared cameras are placed on the holographic display unit 1012 through a precisely designed positional relationship, and a high-power infrared LED lamp is used at the periphery of the lens to provide an infrared light source. The reflective marking points on the holographic tracking glasses 1021 will reflect infrared light, and the reflected infrared light is captured by the infrared camera, and the image is captured by the high-speed camera and processed into a grayscale image to obtain the two-dimensional coordinates of the reflective sphere on the holographic tracking glasses 1021 . Two pictures taken by two lenses are used to obtain different two-dimensional coordinates of the reflective ball at the same time, and the three-dimensional coordinates of the reflective ball in space are calculated through a 2D-to-3D algorithm. The acquired position information is provided to the holographic display content to acquire the correct stereoscopic display image.

The holographic display unit 1012 is composed of an active stereoscopic display body and a holographic control module, and the holographic control module includes a pose sensor, a 3D signal transmitter, a power supply module, and the like.

The active stereoscopic display body adopts a high refresh rate LED screen body. The holographic control module controls the display screen and display frequency of the screen body. It is connected to the holographic tracking glasses 1021 through a 3D signal transmitter to control the switching of the left and right glasses of the glasses and the display screen frequency. the same in order to form a 3D image within the viewer's field of view. The integrated power supply module provides power to the infrared optical camera and the display body at the same time. The position sensor is integrated on the screen body. Users can adjust the tilt angle of the display screen according to their own sitting posture and height. body tilt angle. The tilt data is transmitted to the holographic content in the computing unit. After the holographic content acquires the pose data, the screen display angle is adjusted in real time, and the holographic tracking glasses 1021 are used to achieve an excellent visual experience.

The interactive control unit 102 includes holographic tracking glasses 1021 and an interactive control pen 1022, which are used to provide viewing and control of holographic 3D content, and to view the display screen through the holographic tracking glasses 1021. The holographic tracking glasses 1021 adopt active stereo technology, and control the left and right glasses When the holographic tracking glasses 1021 appear in the capture area, the holographic screen is displayed in 3D mode, and when the holographic tracking glasses 1021 leave the capture area, the holographic screen Displayed in 2D mode.

At the same time, the tracking marks on the glasses and the infrared optical motion capture unit 1011 are used to control the display angle of the screen to achieve a more three-dimensional effect, so that the virtual object is visually displayed outside the screen, and the three-dimensional effect of the screen is obtained.

The virtual object displayed is operated and controlled by the interactive control pen 1022. The interactive control pen 1022 is composed of optical markers and an IMU sensor. The infrared optical motion capture unit 1011 captures the optical markers on the pen and the IMU information to obtain the information of the interactive control pen 1022. location information in space, while transmitting information to holographic content. After the optical marking point in the interactive control pen 1022 is captured by the infrared optical camera in the holographic display device main body 101, the three-dimensional coordinate data of the marking point is obtained, and the IMU module in the interactive control pen 1022 provides rotation information according to the posture of the pen in space, After algorithm integration, the optical three-dimensional coordinates and the IMU rotation information are fused, and the pose data of the interactive control pen 1022 in space is output.

The computing unit 103 is used for running the holographic content and motion capture software, and provides computing support for calculating the spatial position of the holographic tracking glasses 1021 and the interactive control pen 1022, and can flexibly configure different computing units according to the complexity of the running holographic content, namely the computing unit It is not fixed, and different computing configurations can be replaced or updated at any time according to needs.

This embodiment proposes a new desktop-level holographic 3D display device. Compared with similar products on the market, this solution has an independent computing unit, which makes the device more flexible to use. It can adapt to various application scenarios, and continuously update the iterative computing unit according to the needs of different content. The binocular high-speed infrared optical motion capture camera is combined with the 3D display screen and the IMU pose sensor is added to form an integrated body, which is easy to operate. The integrated design of holographic display optical motion capture equipment can also ensure the accuracy and stability of infrared optical motion capture data output.

Example 2:

Further, based on the above-mentioned hardware structural modules, the present application also provides a desktop holographic display method based on the device in Embodiment 1. The holographic display method is based on each structural system module in the above-mentioned embodiment. For beneficial effects, refer to the above-mentioned implementation. For example, it will not be repeated here. Referring to Figure 2, the method can include:

Step 201: Obtain the three-dimensional position information of the holographic tracking glasses and the interactive control pen in the motion capture space through the infrared optical motion capture unit located at the upper end of the holographic display unit, and determine whether the holographic tracking glasses are within the capture range, and when the holographic tracking glasses are in the capture area When it appears, the holographic screen is displayed in 3D mode, otherwise, it is displayed in 2D mode; at the same time, the three-dimensional position information of the holographic tracking glasses and the interactive control pen and the inclination angle of the holographic display unit are transmitted to the computing unit;

Step 202: Synchronize the three-dimensional position information of the holographic tracking glasses and the interactive control pen in the motion capture space to the holographic display unit, and operate and control the displayed virtual object through the interactive control pen;

Step 203 : Adjust the display angle of the screen in real time according to the tilt angle of the holographic display unit, the three-dimensional position information of the holographic tracking glasses and the interactive control pen in the motion capture space, so as to display the holographic stereoscopic screen corresponding to the user's perspective.

Example 3:

The above embodiments 1-2 describe in detail the desktop holographic display device and method in the embodiments of the present application from the perspective of modular functional entities. Among the several embodiments provided in the present application, it should be understood that the disclosed system , the device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integration into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

3 is a schematic diagram of a desktop holographic display device provided by an embodiment of the present application. The desktop holographic display device 400 may vary greatly due to different configurations or performances, and may include one or more processors (cemtrml processimg umits, CPU) 410 (eg, one or more processors) and memory 420, one or more storage media 430 (eg, one or more mass storage devices) storing application programs 433 or data 432. Among them, the memory 420 and the storage medium 430 may be short-term storage or persistent storage. The program stored in the storage medium 430 may include one or more modules (not shown in the figure), and each module may include a series of instruction operations on the desktop holographic display device 400 . Furthermore, the processor 410 may be configured to communicate with the storage medium 430 to execute a series of instruction operations in the storage medium 430 on the holographic display device 400 .

The desktop holographic display device 400 may also include one or more power supplies 440, one or more wired or wireless network interfaces 430, one or more input and output interfaces 460, and/or, one or more operating systems 431, such as Wimdows Server , Nmc OS X, Umix, Limux, FreeBSD and many more. Those skilled in the art can understand that the structure of the desktop holographic display device shown in FIG. 3 does not constitute a limitation on the desktop holographic display device, and may include more or less components than those shown in the figure, or combine some components, or different Component placement.

The present application also provides a computer-readable storage medium. The computer-readable storage medium may be a non-volatile computer-readable storage medium. The computer-readable storage medium may also be a volatile computer-readable storage medium. Instructions are stored in the computer-readable storage medium, and when the instructions are executed on the computer, make the computer execute the steps of the desktop holographic display method.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (remd-omly nenory, RON), random access memory (rmmdon mccess nenory, RMN), magnetic disk or optical disk and other media that can store program codes .

In the embodiments provided in the present application, it should be understood that the disclosed methods may be implemented in other manners without exceeding the spirit and scope of the present application. The current embodiment is an illustrative example and should not be taken as a limitation, and the specific content given should not limit the purpose of this application. For example, some features can be ignored, or not implemented.

The technical means disclosed in the solution of the present application are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for those skilled in the art, without departing from the principles of the present application, several improvements and modifications can also be made, and these improvements and modifications are also regarded as the protection scope of the present application.

A holographic display method, system, computer program product and storage medium provided by the embodiments of the present application have been described in detail above. The principles and implementations of the present application are described with specific examples in this paper. It is only used to help understand the method of the present application and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific embodiments and application scope. In summary, The contents of this specification should not be construed as limiting the application. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these Modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A desktop holographic display all-in-one machine device, comprising:

the holographic display device comprises a holographic display device main body, a holographic display unit and a control unit, wherein the holographic display device main body is used for integrating an infrared optical motion capture unit and the holographic display unit in structure and function, the infrared optical motion capture unit and the holographic display unit are powered by a common main board, a gravity sensing IMU (inertial measurement unit) module is arranged in the holographic display device main body, when the device inclines, the inclination angle of the device can be sensed, and the inclination angle of the device is output to holographic content in real time so as to adjust a displayed picture in real time;

the interactive control unit comprises holographic tracking glasses and an interactive control pen, and is used for providing watching and controlling holographic 3D content and watching a display picture through the holographic tracking glasses, the holographic tracking glasses adopt an active stereo technology, and the left and right eye pictures are displayed at intervals by controlling switches of left and right glasses lenses to be synchronous with the display picture, so that a visual stereo effect is caused;

and the computing unit is used for operating the holographic content and the motion capture software, and different computing units can be flexibly configured according to the complexity of the operated holographic content.

2. The apparatus of claim 1,

the infrared optical motion capturing unit comprises an infrared optical binocular capturing camera, the infrared optical binocular capturing camera is located at the upper end of the holographic display unit and used for capturing position information of the holographic tracking glasses in real time, and whether the holographic tracking glasses are in a capturing range is judged through a capturing result so as to adjust the state of the holographic display equipment in real time.

3. The device of claim 2, wherein the holographic representation is displayed in a 3D mode when the holographic tracking glasses are present in the capture area and in a 2D mode when the holographic tracking glasses are removed from the capture area.

4. The apparatus according to claim 1, wherein the holographic display unit is composed of an active stereoscopic display screen body and a holographic control module, and the holographic control module comprises a pose sensor, a 3D signal emitter and a power supply module.

5. The apparatus of claim 4,

the active three-dimensional display screen body adopts a high-refresh-rate LED screen body, the holographic control module controls the display picture and the display frequency of the screen body, the active three-dimensional display screen body is connected with holographic tracking glasses through a 3D signal transmitter, and the switches of the left and right glasses of the glasses are controlled to be the same as the display picture frequency, so that a 3D image is formed in the visual field of a viewer.

6. The device of claim 1, wherein the interactive control unit operates the virtual object for controlling the display by means of an interactive control pen, the interactive control pen being composed of an optical marker and an IMU sensor for capturing the optical marker and IMU information on the interactive control pen by means of an infrared optical motion capturing unit to obtain position information of the interactive control pen in space and transmitting the information to the holographic content.

7. A desktop holographic display method, comprising:

acquiring three-dimensional position information of the holographic tracking glasses and the interactive control pen in the motion capture space through an infrared optical motion capture unit positioned at the upper end of the holographic display unit, and judging whether the holographic tracking glasses are in a capture range, wherein when the holographic tracking glasses appear in a capture area, a holographic picture is displayed in a 3D mode, and otherwise, the holographic picture is displayed in a 2D mode; meanwhile, the three-dimensional position information of the holographic tracking glasses and the interactive control pen and the inclination angle of the holographic display unit are transmitted to the computing unit;

synchronizing the three-dimensional position information of the holographic tracking glasses and the interactive control pen in the motion capture space to a holographic display unit, and operating and controlling the displayed virtual object through the interactive control pen;

and adjusting the display angle of the picture in real time according to the inclination angle of the holographic display unit, the three-dimensional position information of the holographic tracking glasses and the interactive control pen in the motion capture space so as to display the outgoing holographic stereo picture corresponding to the user visual angle.

8. The desktop holographic display method of claim 7, wherein a pose sensor is integrated on the holographic display unit, so that a user can adjust the tilt angle of the display screen according to his own sitting posture and height, and the tilt angle of the screen body is measured in real time along with the tilt of the screen body, so as to adjust the display angle of the picture in real time.

9. A non-transitory computer-readable storage medium storing computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform the method of any one of claims 7-8.

10. A computer program product, characterized in that the computer program product comprises a computer program stored on a non-volatile computer-readable storage medium, the computer program comprising program instructions which, when executed by a processor, cause the processor to carry out the method of any one of claims 7 to 8.

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