JP5521621B2 - Mobile terminal, augmented reality system, and augmented reality information display method - Google Patents

Description

  The present invention relates to a mobile terminal, an augmented reality system, and an augmented reality information display method.

  In recent years, augmented reality technology, which is a technology for superimposing and displaying a virtual object and information on a real space image captured by a camera or the like, has become widespread. For example, the user images the surroundings with the camera function of a mobile phone. Then, various additional information such as tags (hereinafter referred to as augmented reality information) is added to the camera image and displayed by the augmented reality function in the mobile phone.

  The mobile phone described in Patent Document 1 changes the order of telephone number display using information acquired by a sensor attached to the mobile phone. A body temperature sensor, a heart rate sensor, and a blood pressure sensor are attached to the mobile phone. The mobile phone determines the display order of telephone numbers using information acquired by these sensors at the time of a user's telephone number display command.

  Patent Document 2 discloses a technology related to a portable terminal device that can automatically provide music content that matches the current situation of a user. The portable terminal device acquires current date / time information, weather information, and surrounding audio information. Then, the mobile terminal device automatically selects and reproduces music content that matches the acquired information.

JP 2007-034495 A JP 2009-145785 A

  However, in the conventional augmented reality technology, the user has to select augmented reality information to be displayed on the screen or set a filter for selection. For this reason, there is a problem that user's setting is troublesome and operability is poor. Moreover, the above-mentioned patent document has no suggestion regarding the augmented reality function.

  The present invention has been made to solve such a problem, and a mobile terminal, an augmented reality information system, and an augmented reality information system that can display augmented reality information according to a user's state without impairing operability. The object is to provide a method for providing real information.

  One aspect of the filtering device according to the present invention is based on augmented reality information corresponding to terminal position information, and uses information on at least one of the surrounding situation and biological information to display information displayed on a camera image obtained by capturing the surrounding image. An augmented reality processing unit for filtering is provided.

  One aspect of the portable terminal according to the present invention includes the filtering device, an imaging unit for generating a camera image obtained by imaging a peripheral image, a sensor processing unit that acquires at least one of a peripheral situation and biological information, and the imaging A display unit that displays a display image in which the augmented reality information determined to be displayed by the filtering is superimposed on the camera image captured by the unit.

  An aspect of the augmented reality information display method according to the present invention includes an imaging step of generating a camera image obtained by capturing a peripheral image, a sensor information acquisition step of acquiring at least one of a peripheral situation and biological information, and terminal position information The augmented reality processing step of filtering the augmented reality information corresponding to the information using the information acquired in the sensor information acquiring step, and the augmented reality information determined to be displayed by the filtering on the camera image acquired in the imaging step And a display step for displaying a display image in which the images are superimposed.

  ADVANTAGE OF THE INVENTION According to this invention, the portable terminal which can display the augmented reality information according to a user's state, an augmented reality information system, and the augmented reality information provision method can be provided.

1 is a configuration diagram of a mobile terminal according to a first exemplary embodiment; It is a figure of the augmented reality information according to the first exemplary embodiment. 1 is a configuration diagram of an augmented reality system according to a first exemplary embodiment; 3 is a flowchart showing processing of the mobile terminal according to the first exemplary embodiment; 3 is a flowchart showing processing of the mobile terminal according to the first exemplary embodiment; It is a block diagram of the augmented reality system concerning Embodiment 2. FIG. 10 is a flowchart showing processing of the mobile terminal according to the second exemplary embodiment. 10 is a flowchart showing processing of the mobile terminal according to the second exemplary embodiment. 1 is a configuration diagram of a mobile terminal according to a first exemplary embodiment;

Embodiment 1
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the mobile terminal 1 according to the present embodiment. The mobile terminal 10 includes a central processing unit 110, a memory 120, a key input unit 130, a sensor 140, an imaging unit 150, a communication unit 160, a position information acquisition unit 170, an augmented reality processing unit 180, Display 190.

  The central processing unit 110 is a so-called CPU (Central Processing Unit), and is a processing device that executes various processes in the mobile terminal 10 based on a control program.

  The memory 120 is a storage device that stores data, programs, and the like in the mobile phone 10. Examples of the memory 120 include a RAM (Random Access Memory) and a ROM (Read Only Memory).

  The key input unit 130 is an operation unit used for inputting characters, numbers, and the like. The key input unit 130 includes various keys such as a numeric keypad and function keys.

  The sensor 140 is a sensor for acquiring information around the user who uses the mobile terminal 10. Here, the surrounding information includes user's biological information and surrounding information. Examples of the user's biological information include the user's pulse, body temperature, and sweating state. The peripheral information includes temperature, humidity, altitude, and the like. In addition, the sensor 140 may acquire the said information constantly, and may acquire information at a fixed interval.

  The imaging unit 150 includes a camera function for capturing a moving image and a still image, and is a processing unit that generates a camera image obtained by imaging an arbitrary three-dimensional space.

  The communication unit 160 is a processing unit for transmitting / receiving information to / from a server or the like. Specifically, the communication unit 160 is a processing unit capable of wireless communication by WLAN (Wireless Local Area Network), UTRAN (UMTS Terrestrial Radio Access Network), E-UTRAN (Evolved UTRAN), or the like. Note that the communication unit 160 provided in the mobile terminal 10 according to the present embodiment may be a processing unit capable of wireless communication such as infrared communication or Bluetooth. The communication unit 160 acquires augmented reality information corresponding to the position information acquired by the position information acquisition unit 170 described later from the server.

  The position information acquisition unit 170 is a processing unit for acquiring position information where the mobile terminal 10 exists. The position information acquisition unit 170 is a processing unit having a GPS (Global Positioning System) function or a position positioning function by WLAN, for example.

  Although not shown, the mobile terminal 10 is configured to include a geomagnetic sensor and an acceleration sensor. By using the information acquired by the geomagnetic sensor, it is possible to calculate the terminal orientation of the mobile terminal 10 while operating the camera function. Further, by using the information acquired by the acceleration sensor, the terminal posture of the mobile terminal 10 while the camera function is operating can be calculated. Here, the range captured by the camera function of the mobile terminal 10 includes the position information of the mobile terminal 10 acquired by the position information acquisition unit 170, the terminal orientation of the mobile terminal 10, the terminal posture of the mobile terminal 10, and the camera. It can be calculated by using the focal length of the function. The augmented reality information corresponding to the range captured by the camera function of the mobile terminal 10 is displayed on the display 190 when it is determined that the information will be displayed by the filtering process described later.

  The augmented reality processing unit 180 is a processing unit that extracts (filters) information to be displayed from the augmented reality information acquired by the communication unit 170 based on the information acquired by the sensor 140.

  The augmented reality information is data in one table format for each object. The object refers to a data set including tags and the like displayed on the display 190 of the mobile terminal 10 when the augmented reality application is activated. FIG. 2 shows an example of the augmented reality information data set according to the present embodiment.

  The augmented reality information data set includes a title, a format, a description, position information, and filter information. The title and description are information that is displayed superimposed on the camera image while the augmented reality application is activated. The format is information for designating a font or the like for the display. The position information indicates which position the augmented reality information relates to. The filter information is information used for determining whether or not the augmented reality information is to be displayed while the augmented reality application is activated. A plurality of condition information can be set in the filter information. A keyword can be set in the filter information.

  When a plurality of filter information conditions are set, priority may be set for each condition. For example, it is assumed that the condition 1 is “display information when the temperature is 25 ° C. or higher” and the condition 2 is “display information when the body temperature is 37 ° C.”. It is assumed that the air temperature is 25 degrees or higher and the body temperature is lower than 37 degrees. In this case, if a priority order that prioritizes condition 1 is given, the augmented reality information is a display target.

  Based on the information acquired by the position information acquisition unit 170, the position information determination unit 181 converts the position information where the mobile terminal 10 is located into data in a format that can be processed by a computer. The sensor information processing unit 182 is a processing unit that stores various data (pulse, body temperature, sweating state, temperature, humidity, etc.) acquired by the sensor 140 in the memory 120. The display filter unit 183 is a processing unit that determines whether or not to display augmented reality information.

  In the example of FIG. 2, a data set of augmented reality information for displaying information on a frozen dessert shop on the screen when the temperature is 25 degrees C. or more is shown.

  In addition to the information (sensing data) acquired by the sensor 140, the augmented reality processing unit 180 uses a user's behavior history, a television viewing history, and a non-contact IC card equipped with the portable terminal 10 in addition to the information acquired by the sensor 140. Filtering may be performed in consideration of preference information such as purchase information and data stored in scheduler software. For example, a keyword related to a program is extracted from TV program information viewed by the user, and the keyword is stored in the memory 120. The augmented reality processing unit 180 displays the augmented reality information in which the keyword stored in the memory 120 is set in the filtering information. Further, when a schedule related to overseas travel is stored in the scheduler software, the augmented reality processing unit 180 may perform filtering so as to display information related to overseas travel.

  The display 190 is a display unit for displaying various types of information on the mobile terminal 10, and examples thereof include a liquid crystal display device and an organic EL (electroluminescence) display device. The display 190 displays an image obtained by superimposing the augmented reality information that is determined to be displayed by the augmented reality processing unit 180 on the camera image.

  Next, the configuration of the augmented reality system 1 including the mobile terminal 10 according to the present embodiment will be described with reference to FIG. The augmented reality system 1 includes a mobile terminal 10, an augmented reality server 20, a base station 30, and an exchange 40. The mobile terminal 10, the base station 30, and the exchange 40 are configured to exist in an arbitrary number.

  The mobile terminal 10 transmits the current position information to the augmented reality server 20. Further, the mobile terminal 10 receives the augmented reality information (FIG. 2) related to the position from the augmented reality server 20. The mobile terminal 10 filters the received augmented reality information and determines information to be displayed.

  The augmented reality server 20 is a server that holds a plurality of the aforementioned augmented reality information (FIG. 2). The augmented reality server 20 receives position information from the mobile terminal 10. The augmented reality server 20 transmits augmented reality information corresponding to the received position information to the mobile terminal 10.

  The base station 30 and the switching center 40 are devices that relay communication between the mobile terminal 10 and the augmented reality server 20.

  Note that the mobile terminal 10 may transmit sensing information acquired by the sensor 140 in addition to the position information to the augmented reality server 20. In this case, the augmented reality server 20 calculates augmented reality information to be displayed on the mobile terminal 10 using the transmitted sensing information (performs filtering). The augmented reality server 20 transmits the filtering result to the mobile terminal 10. Thereby, the amount of data transmitted by the augmented reality server 20 can be reduced.

  Next, a processing procedure of sensing data (data acquired by the sensor 140) of the mobile terminal 10 according to the present embodiment will be described using the flowchart of FIG. In the following example, an example in which the sensor 140 acquires temperature data will be described.

  The sensor 140 acquires temperature information (S101), and stores the acquired temperature information in the memory 120 (S102). Next, the sensor information processing unit 182 is activated (S103), and it is determined whether or not the acquired temperature information satisfies a predetermined condition. The sensor information processing unit 182 stores the processing result in the memory 120. In the example of FIG. 4, the sensor information processing unit 182 determines whether or not the air temperature is 25 ° C. or more (S104), and stores the determination result in the memory 120 (S105, S106).

  Next, processing for filtering augmented reality information will be described using the flowchart of FIG. In the following description, a procedure for processing the augmented reality information shown in FIG. 2 will be described.

  The mobile terminal 10 transmits its location information to the augmented reality server 20 via the communication unit 160, and receives augmented reality information corresponding to the location information (S201). Here, it is assumed that the augmented reality information illustrated in FIG. 2 is received. The portable terminal 10 stores the received augmented reality information in the memory 120 (S202). Subsequently, the display filter unit 183 is activated (S203).

  The display filter unit 183 acquires the augmented reality information in the memory 120 and extracts the filter information in the information (S204). The display filter unit 183 determines whether or not to display the augmented reality information using the extracted filter information and the determination result of whether or not the temperature stored in the memory 120 is 25 degrees or higher. (S205). Thus, by using temperature information for filtering, for example, information on restaurants that handle cold food can be displayed in an augmented reality application. In addition, it is possible to prevent information on restaurants that handle hot food from being displayed in the augmented reality application.

  When the determination result that the temperature is 25 degrees or higher is in the memory 120 (S205: Yes), the display filter unit 183 extracts information (title, description, etc.) to be displayed from the augmented reality information (S206). Then, the display filter unit 183 generates a display image in which the information is superimposed on the image captured by the imaging unit 150 (S207). The display image is displayed on the display 190.

  When the determination result that the temperature is 25 degrees or higher is not in the memory 120 (S205: No), the display filter unit 183 determines not to display the augmented reality information (S208). And the display image which does not display the said information on the image which the imaging part 150 imaged is produced | generated (S209). The display image is displayed on the display 190.

  Then, the effect of the augmented reality system 1 concerning this Embodiment is demonstrated. The mobile terminal 10 according to the first embodiment has a function of displaying a display image in which augmented reality information is superimposed on the camera image generated by the imaging unit 150 on the display 190 (display unit). The mobile terminal 10 includes a sensor 140 that detects a surrounding situation (temperature, humidity, altitude, etc.) and biological information (body temperature, pulse, sweat state, etc.). The mobile terminal 10 filters information to be displayed from the augmented reality information related to the location where the mobile terminal 10 is located, using various information acquired by the sensor 140. Thereby, it is possible to display augmented reality information according to the user's state without the user setting filtering or the like.

  Further, by further using user preference information (television viewing information, schedule information, etc.) for filtering, it becomes possible to display information more suitable for the user's condition.

Embodiment 2
The second embodiment of the present invention is characterized in that the mobile terminals 10 to 12 communicate with each other. The augmented reality system according to the present embodiment will be described with a focus on differences from the first embodiment. The mobile terminals 10 to 12 are terminal devices having the same function.

FIG. 6 is a block diagram showing the configuration of the augmented reality system according to the present embodiment. The mobile terminals 10 to 12 can acquire the augmented reality information from the augmented reality server 20 as in the first embodiment. The portable terminal 10 can the other portable terminal and W i -F i (R) existing in communication range of the mobile terminal 10 communication authenticated by format.

  The mobile terminal 10 transmits the sensing data acquired by the sensor 140 to the other mobile terminal 11. Here, it is assumed that the mobile terminal 11 functions as a server. The mobile terminal 11 that has received the sensing data filters the augmented reality information (FIG. 2) stored in its own memory 120 using the received sensing data. The mobile terminal 11 transmits only the augmented reality information (FIG. 2) determined to be necessary by the filtering to the mobile terminal 10.

  The portable terminal 10 generates a display screen using the received augmented reality information. Further, the user of the mobile terminal 10 can specify whether or not the augmented reality information provided from the mobile terminal 11 is valid. If it is valid, the mobile terminal 10 continues to store the augmented reality information received from the mobile terminal 11 in the memory 120. On the other hand, if not valid, the augmented reality processing unit 180 in the mobile terminal 10 deletes the augmented reality information received from the mobile terminal 11 from the memory 120.

  Next, the display operation of the augmented reality information of the mobile terminal according to the present embodiment will be described using the flowchart of FIG. In the following description of FIG. 7 and FIG. 8 to be described later, a mobile terminal that operates as a server is a mobile terminal 11 and a mobile terminal that operates as a client is a mobile terminal 10.

  One of the mobile terminals that can communicate first is in a state of functioning as a server (S301). Then, the portable terminals make a connection (S302). The mobile terminal 10 that operates as a client acquires sensing data using the sensor 140. The mobile terminal 10 transmits the acquired sensing data to the mobile terminal 11.

  The portable terminal 11 filters the augmented reality information (FIG. 2) stored in its own memory 120 using the received sensing data. And the portable terminal 11 transmits the augmented reality information which matched filtering to the portable terminal 10 (S305). The portable terminal 10 generates a display screen using the received augmented reality information (S306).

  Next, the storage operation of augmented reality information and the display operation of augmented reality information of the mobile terminal according to the present embodiment will be described using the flowchart of FIG. The user using the mobile terminal 10 refers to the augmented reality information provided from the mobile terminal 11 with reference to the display screen during the augmented reality application activation (S401). Then, the user inputs whether or not the augmented reality information is valid by operating the key input unit 130 or the like.

  When the augmented reality information provided from the portable terminal 11 is valid (S402: Yes), the portable terminal 10 continues to store the augmented reality information in the memory 120 (S404). On the other hand, when the augmented reality information provided from the mobile terminal 11 is not valid (S402: No), the augmented reality processing unit 180 deletes the augmented reality information from the memory 120 (S403).

  The user holding the portable terminal 10 can move to an arbitrary place (S405). It is assumed that the user of the mobile terminal 10 starts the augmented reality application at the place where the mobile terminal 10 has moved. The mobile terminal 10 determines whether augmented reality information corresponding to the location information acquired by the location information acquisition unit 170 exists in the memory 120 and whether the filtering condition is met (S406). If it exists in the memory 120 and matches the filtering condition (S406: Yes), the augmented reality information is displayed on the display 190 (S407). On the other hand, when the condition is not satisfied (S406: No), the augmented reality information is not displayed on the display 190 (S408).

Subsequently, effects of the augmented reality system according to the present embodiment will be described. The mobile terminal 10 transmits sensing data to the other mobile terminal 11 and receives only augmented reality information that matches the filtering. Thus, the mobile terminal can send and receive by wireless communication is authenticated only augmented reality information corresponding to the filtering by W i -F i (registered trademark). Receiving augmented reality information is made possible without the transceiver of augmented reality information using a wireless communication authenticated by W i -F i (R) via a switching center or the like. As a result, the amount of communication can be reduced.

  In addition, the mobile terminal 10 continues to store only the augmented reality information received from other mobile terminals determined to be valid by the user in the memory 120. Therefore, the mobile terminal 10 can continue to hold effective augmented reality information, and high-accuracy filtering is possible.

  Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention. For example, the augmented reality information shown in FIG. 2 may be appropriately generated on each portable terminal.

  FIG. 9 shows a filtering device mounted on the mobile terminal 10 according to the first embodiment. The said filtering apparatus may be mounted in the portable terminal 10 and may be arrange | positioned on a server.

  The filtering device includes an augmented reality processing unit 180 inside. The augmented reality processing unit 180 acquires augmented reality information corresponding to the input terminal position information. The augmented reality processing unit 180 filters the augmented reality information using at least one of the surrounding situation and the biological information. Information that matches the filtering is displayed on the camera image.

  Also with the configuration of the filtering device described above, it is possible to display augmented reality information according to the user's state based on the sensing data.

  A part or all of the above embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
A filtering apparatus comprising an augmented reality processing unit that filters information displayed on a camera image obtained by capturing a peripheral image using at least one of peripheral status and biological information from augmented reality information corresponding to terminal position information.

(Appendix 2)
The filtering device;
An imaging unit for generating a camera image capturing a peripheral image;
A sensor processing unit for acquiring at least one of a peripheral situation and biological information;
And a display unit configured to display a display image in which the augmented reality information determined to be displayed by the filtering is displayed on the camera image captured by the imaging unit.

(Appendix 3)
The mobile terminal according to appendix 2, wherein the augmented reality information includes filtering information indicating the filtering condition.

(Appendix 4)
The mobile terminal according to appendix 2 or appendix 3, wherein the augmented reality processing unit performs the filtering using information acquired by the sensor processing unit and preference information of a user of the mobile terminal.

(Appendix 5)
A communication unit that transmits terminal location information to an augmented reality server that holds the augmented reality information, and receives the augmented reality information corresponding to the location information from the augmented reality server; The portable terminal according to any one of 2 to appendix 4.

(Appendix 6)
A storage unit for storing the augmented reality information received from the augmented reality server or another mobile terminal;
The communication unit is configured to be able to communicate with another portable terminal by wireless communication, and transmits the augmented reality information in the storage unit to the other portable terminal in response to a request from the other portable terminal. The mobile terminal according to appendix 5, which is characterized.

(Appendix 7)
The mobile terminal according to appendix 6, wherein the augmented reality processing unit deletes the augmented reality information from the other mobile terminal that is determined to be invalid by the user from the storage unit.

(Appendix 8)
8. An augmented reality system comprising the mobile terminal according to any one of appendix 5 to appendix 7, and the augmented reality server according to appendix 5.

(Appendix 9)
An imaging step for generating a camera image capturing a peripheral image;
A sensor information acquisition step for acquiring at least one of the surrounding situation and biological information;
Augmented reality processing step of filtering the augmented reality information corresponding to the terminal position information using the information acquired in the sensor information acquiring step;
An augmented reality information display method comprising: a display step of displaying a display image obtained by superimposing the augmented reality information determined to be displayed by the filtering on the camera image acquired in the imaging step.

(Appendix 10)
The augmented reality information display method according to appendix 9, wherein the augmented reality information includes filtering information indicating the filtering condition.

(Appendix 11)
The augmented reality information display according to appendix 8 or appendix 10, wherein in the augmented reality processing step, the filtering is performed using information acquired by the sensor processing unit and preference information of a user of the mobile terminal. Method.

(Appendix 12)
Transmitting the positional information calculated in the positional information calculating step to an augmented reality server that holds the augmented reality information;
The augmented reality information display method according to any one of supplementary notes 9 to 111, comprising: a reception step of receiving the augmented reality information corresponding to the position information from the augmented reality server.

(Appendix 13)
A storage step of storing the augmented reality information received from the augmented reality server or another mobile terminal;
A terminal transmission requesting step for requesting transmission of the augmented reality information to another portable terminal;
The augmented reality information display method according to appendix 12, further comprising: a terminal transmission step of transmitting the augmented reality information stored in the storing step to the terminal in response to a transmission request from another portable terminal. .

(Appendix 14)
The augmented reality information display method according to appendix 13, wherein the augmented reality processing unit further includes an information deleting step of deleting the augmented reality information from the other mobile terminal that is determined to be invalid by the user.

DESCRIPTION OF SYMBOLS 1 Augmented reality system 10 Portable terminal 110 Central processing unit 120 Memory 130 Key input part 140 Sensor 150 Imaging part 160 Communication part 170 Position information acquisition part 180 Augmented reality processing part 181 Position specific part 182 Sensor information processing part 183 Display filter part 190 Display 20 Augmented reality server 30 Base station 40 Switching office

Claims (9)

The terminal location information is transmitted to the augmented reality server that holds the augmented reality information, the augmented reality information corresponding to the terminal location information is received from the augmented reality server, and at least one of the surrounding situation and the biological information from other terminals A communication unit that receives sensing data including:
An augmented reality processing unit configured to filter information displayed on a camera image obtained by capturing a peripheral image using sensing data received from the other terminal from the augmented reality information received from the augmented reality server. ,
The communication unit transmits the in communications with another terminal performs W i -F i (registered trademark) communication, the augmented reality information extracted by the filtering of the augmented reality processing unit to the other terminals, mobile Terminal. A storage unit for storing the augmented reality information filtered using at least one of the surrounding state of the device and biological information;
The augmented reality processing unit deletes the augmented reality information determined to be unnecessary by the user from the storage unit;
The mobile terminal according to claim 1. An imaging unit that captures the camera image;
A sensor processing unit for obtaining the sensing data;
A display unit that displays a display image in which the filtered augmented reality information is superimposed on the camera image captured by the imaging unit;
The portable terminal of Claim 1 or Claim 2 provided with.   The mobile terminal according to claim 1, wherein the augmented reality information includes filtering information indicating a filtering condition.   The mobile terminal according to claim 1, wherein the augmented reality processing unit performs filtering using the sensing data and preference information of a user of the mobile terminal.   An augmented reality system comprising the mobile terminal according to any one of claims 1 to 5 and the augmented reality server according to claim 1. An augmented reality information display method in a mobile terminal including a communication unit and an augmented reality processing unit,
The communication unit transmits terminal location information to an augmented reality server that holds augmented reality information, receives the augmented reality information corresponding to the terminal location information from the augmented reality server, and from other terminals, the surrounding situation and Receiving sensing data including at least one of biological information;
The augmented reality processing unit uses the sensing data received from the other terminal from the augmented reality information received from the augmented reality server to filter information displayed on a camera image obtained by capturing a peripheral image,
The communication unit transmits the in communications with another terminal performs W i -F i (registered trademark) communication, the augmented reality information extracted by the filtering of the augmented reality processing unit to the other terminals, mobile A method of displaying augmented reality information on a terminal. The portable terminal includes a storage unit that stores the augmented reality information filtered using at least one of the surrounding state of the device and biological information,
The augmented reality information display method according to claim 7, wherein the augmented reality processing unit deletes the augmented reality information determined to be unnecessary by the user from the storage unit.   The augmented reality information display method according to claim 7 or 8, wherein the augmented reality information includes filtering information indicating the filtering condition.

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