Abstract: A method is provided. The method includes obtaining a video including a plurality of frames, estimating a field of view (FoV) trajectory indicating movements of a FoV of the camera, by using the frames of the video, detecting feature points of one or more objects in each of the frames of the video, estimating object trajectories indicating movements of the one or more objects, based on the feature points, determining hand candidates of a user from among the one or more objects, based on the FoV trajectory of the camera and the object trajectories, obtaining a head movement trajectory indicating movements of a head of the user, determining a hand of the user, based on the head movement trajectory and the object trajectories corresponding to the hand candidates of the user, tracking the determined hand of the user in the video, and recognizing a gesture.

Abstract: An electronic device is provided. The electronic device includes a camera, and at least one processor, wherein the at least one processor is configured to extract at least one face region and at least one hand region from an image captured by the camera, to acquire a biosignal from each of the extracted at least one face region and hand region, to match the face region and the hand region in the image using the acquired biosignals, to identify a user by performing face recognition on the image while acquiring the biosignal, and to identify a command for controlling an operation of the electronic device based on the biosignal in the hand region matching the face region for the identified user.

Abstract: A method of performing a command of a user on a target object by using a tag and a visual descriptor of the target object obtained through human computer interaction (HCl) is provided. The method includes obtaining a plurality of images including a target object, detecting a motion of the user manipulating the target object, based on the plurality of images, obtaining a visual descriptor of the target object including visual information for identifying the target object, obtaining a tag of the target object by receiving information related to the target object, by marking the target object, and in response to receiving an input signal corresponding to the tag, performing an operation corresponding to the input signal on the target object, based on the visual descriptor.

Abstract: A user authentication method, by which a device authenticates a user, is provided. The user authentication method includes performing basic authentication based on a received user input, obtaining behavioral characteristics with which the user uses the device, and when the user has passed the basic authentication, performing additional authentication for the user by applying the obtained behavioral characteristics to a first learning model, wherein the first learning model is a model trained to perform the additional authentication for the user, based on at least one of a plurality of behavioral characteristics of an authenticated user, the behavioral characteristics being accumulated in the device.

Abstract: A method of controlling an electronic device by recognizing movement of an object includes obtaining at least one image including an image of the object; dividing the obtained at least one image into a middle zone and a peripheral zone; extracting one or more feature points of the object that are within the peripheral zone; recognizing movement of the object based on the extracted one or more feature points; and controlling the electronic device based on the recognized movement.

Abstract: A device and a method is provided. The method includes identifying a sight direction of the device based on the movement information. The method also includes identifying an angle formed between a first straight line that starts from a predetermined position on the display and corresponds to the identified sight direction, and a second straight line that starts from the predetermined position and corresponds to a direction according to a movement trajectory obtained from multiple frames. The method further includes determining whether to start an adjusting mode for providing a frame corresponding to the identified sight direction based on the identified angle and a threshold value determined with respect to a field of view of the device. The method additionally includes identifying a first frame and a second frame among the multiple frames. The method also includes displaying the first frame and then display the second frame.

Abstract: Provided are a system and a method for providing information by using a near field communication. A method for a first device to provide information to a second device includes receiving a first message broadcasted from a communication apparatus since the first device is located within a near field communication range of the communication apparatus; receiving a second message from the second device since the second device located within the near field communication range of the communication apparatus is in near field contact with the first device after the first message is received; authenticating the second device using the second message; and providing predetermined information related to the communication apparatus and the second device since the second device is authenticated.

Abstract: Provided is a method of providing, by a server, account information, the method including: receiving an account generation request message from a first device; generating first account information, based on user identification information included in the account generation request message; transmitting the generated first account information to the first device; receiving an account use request message from a second device; identifying the first account information and service identification information included in the received account use request message; and transmitting second account information corresponding to the identified first account information and the service identification information, to the second device.

Abstract: Provided are a system and a method for providing information by using a near field communication. A method for a first device to provide information to a second device includes receiving a first message broadcasted from a communication apparatus since the first device is located within a near field communication range of the communication apparatus; receiving a second message from the second device since the second device located within the near field communication range of the communication apparatus is in near field contact with the first device after the first message is received; authenticating the second device using the second message; and providing predetermined information related to the communication apparatus and the second device since the second device is authenticated.

Abstract: The apparatus, for using a frictional sound input, includes a microphone configured to receive an audio signal; and a processor configured to detect frictional sound from the audio signal, determine a frictional property by analyzing a characteristic of the detected frictional sound, and execute a control command corresponding to the frictional property.

Abstract: Provided are a deformable display device for displaying an image and a method of displaying an image. The method includes determining a current shape of the display device, capturing an image of a user of the display device, detecting a relative position of the user with respect to the display device, based on the captured image of the user, determining a visible region among an entire screen region of the display device, based on the determined current shape and the detected position, and displaying the image on the determined visible region.

Abstract: A device and a method is provided. The method includes identifying a sight direction of the device based on the movement information. The method also includes identifying an angle formed between a first straight line that starts from a predetermined position on the display and corresponds to the identified sight direction, and a second straight line that starts from the predetermined position and corresponds to a direction according to a movement trajectory obtained from multiple frames. The method further includes determining whether to start an adjusting mode for providing a frame corresponding to the identified sight direction based on the identified angle and a threshold value determined with respect to a field of view of the device. The method additionally includes identifying a first frame and a second frame among the multiple frames. The method also includes displaying the first frame and then display the second frame.

Abstract: A method of authenticating a user of a head mounted display (HMD) device includes measuring a characteristic value of a head shape of the user who wears the HMD device by using at least one sensor included in the HMD device, and authenticating a use authority of the user who wears the HMD device based on the measured characteristic value and a characteristic value registered in advance for a head shape of a user who has an authority to use the HMD device.

Abstract: Provided are a deformable display device for displaying an image and a method of displaying an image. The method includes determining a current shape of the display device, capturing an image of a user of the display device, detecting a relative position of the user with respect to the display device, based on the captured image of the user, determining a visible region among an entire screen region of the display device, based on the determined current shape and the detected position, and displaying the image on the determined visible region.

Abstract: Provided is a method of providing, by a server, account information, the method including: receiving an account generation request message from a first device; generating first account information, based on user identification information included in the account generation request message; transmitting the generated first account information to the first device; receiving an account use request message from a second device; identifying the first account information and service identification information included in the received account use request message; and transmitting second account information corresponding to the identified first account information and the service identification information, to the second device.

Abstract: The apparatus, for using a frictional sound input, includes a microphone configured to receive an audio signal; and a processor configured to detect frictional sound from the audio signal, determine a frictional property by analyzing a characteristic of the detected frictional sound, and execute a control command corresponding to the frictional property.