Abstract: A method is provided for analyzing motion of a subject. The method includes receiving multiple events from an event-based sensor, the events corresponding to a luminance change of the subject; calculating velocities of the events and directions of the events; generating a motion analysis table comprising an X axis classified into multiple velocity sections, a Y axis classified into multiple direction sections, and multiple cells representing frequencies of events corresponding to combinations of the velocity sections and the direction sections; and determining a motion of the subject based on the motion analysis table.

Abstract: A time of flight (TOF) camera device and a method of driving the same are provided. The TOF camera device includes a pulse generator configured to generate a pulse signal, and generate a first photo gate signal and a second photo gate signal; a light source configured to irradiate an object with light emitted in synchronization with the pulse signal; and an image sensor configured to receive light reflected from the object in synchronization with the first photo gate signal during a first frame, and receive light reflected from the object in synchronization with the second photo gate signal during a second frame. The pulse generator is further configured to modulate the pulse signal so as to use a frequency of the light as a single frequency.

Abstract: A method of unlocking an electronic device based on motion recognitions generates motion information by detecting a user's motion, calculates optical flows based on the motion information, converts the optical flows into a code by sorting and grouping the optical flows based on predetermined reference directions, generates a comparison result indicating whether the code is consistent with a predetermined password by comparing the code with the predetermined password, and determines whether to unlock the electronic device based on the comparison result.

Abstract: A method of operating a depth sensor includes generating a first photo gate signal and second through fourth photo gate signals respectively having 90-, 180- and 270-degree phase differences from the first photo gate signal, applying the first photo gate signal and the third photo gate signal to a first row of a pixel array and the second photo gate signal and the fourth photo gate signal to a second row adjacent to the first row in a first frame using a first clock signal, and applying the first photo gate signal and the third photo gate signal to a first column of the pixel array and the second photo gate signal and the fourth photo gate signal to a second column adjacent to the first column in a second frame using a second clock signal.

Abstract: A method of operating a depth sensor includes generating a first photo gate signal and second through fourth photo gate signals respectively having 90-, 180- and 270-degree phase differences from the first photo gate signal, applying the first photo gate signal and the third photo gate signal to a first row of a pixel array and the second photo gate signal and the fourth photo gate signal to a second row adjacent to the first row in a first frame using a first clock signal, and applying the first photo gate signal and the third photo gate signal to a first column of the pixel array and the second photo gate signal and the fourth photo gate signal to a second column adjacent to the first column in a second frame using a second clock signal.

Abstract: An iris recognition device, a mobile device having the same, and a method of biometric authentication using the same are provided. The iris recognition device includes: a light source unit configured to transmit a light signal to an iris; and a light source receiver configured to receive a reflected light signal of an image of the iris from the iris, and remove an offset of the reflected light signal, corresponding to noise in the iris image, using a plurality of reference signals having different phases.

Abstract: An image processing device capable of generating foreground object data by using a captured image includes a depth data generator configured to generate depth data of the captured image; an amplitude data generator configured to generate amplitude data of the captured image; a foreground object detector configured to perform a first detection operation for detecting the foreground object based on the generated depth data and first reference background data, and to perform a second detection operation for detecting the foreground object based on the generated amplitude data and second reference background data; and a foreground object data generator configured to generate the foreground object data based on a result of the first detection operation and a result of the second detection operation.

Abstract: An iris recognition device, a mobile device having the same, and a method of biometric authentication using the same are provided. The iris recognition device includes: a light source unit configured to transmit a light signal to an iris; and a light source receiver configured to receive a reflected light signal of an image of the iris from the iris, and remove an offset of the reflected light signal, corresponding to noise in the iris image, using a plurality of reference signals having different phases.

Abstract: A method of unlocking an electronic device based on motion recognitions generates motion information by detecting a user's motion, calculates optical flows based on the motion information, converts the optical flows into a code by sorting and grouping the optical flows based on predetermined reference directions, generates a comparison result indicating whether the code is consistent with a predetermined password by comparing the code with the predetermined password, and determines whether to unlock the electronic device based on the comparison result.

Abstract: A time of flight (TOF) camera device and a method of driving the same are provided. The TOF camera device includes a pulse generator configured to generate a pulse signal, and generate a first photo gate signal and a second photo gate signal; a light source configured to irradiate an object with light emitted in synchronization with the pulse signal; and an image sensor configured to receive light reflected from the object in synchronization with the first photo gate signal during a first frame, and receive light reflected from the object in synchronization with the second photo gate signal during a second frame. The pulse generator is further configured to modulate the pulse signal so as to use a frequency of the light as a single frequency.

Abstract: A method is provided for analyzing motion of a subject. The method includes receiving multiple events from an event-based sensor, the events corresponding to a luminance change of the subject; calculating velocities of the events and directions of the events; generating a motion analysis table comprising an X axis classified into multiple velocity sections, a Y axis classified into multiple direction sections, and multiple cells representing frequencies of events corresponding to combinations of the velocity sections and the direction sections; and determining a motion of the subject based on the motion analysis table.

Abstract: A method of operating a depth sensor includes generating a first photo gate signal and second through fourth photo gate signals respectively having 90-, 180- and 270-degree phase differences from the first photo gate signal, applying the first photo gate signal and the third photo gate signal to a first row of a pixel array and the second photo gate signal and the fourth photo gate signal to a second row adjacent to the first row in a first frame using a first clock signal, and applying the first photo gate signal and the third photo gate signal to a first column of the pixel array and the second photo gate signal and the fourth photo gate signal to a second column adjacent to the first column in a second frame using a second clock signal.

Abstract: An image processing device capable of generating foreground object data by using a captured image includes a depth data generator configured to generate depth data of the captured image; an amplitude data generator configured to generate amplitude data of the captured image; a foreground object detector configured to perform a first detection operation for detecting the foreground object based on the generated depth data and first reference background data, and to perform a second detection operation for detecting the foreground object based on the generated amplitude data and second reference background data; and a foreground object data generator configured to generate the foreground object data based on a result of the first detection operation and a result of the second detection operation.

Abstract: A method of recognizing a self location of an image acquisition device by acquiring an image of two or more reference objects is provided.

Abstract: An apparatus for actively tracking an object is provided. The apparatus includes a camera unit; a motor drive for changing a shooting direction of the camera unit; and a controller for acquiring a first comparative image and a second comparative image in sequence using the camera unit, comparing the first comparative image with the second comparative image, detecting a moving direction and a speed of an identical object existing in the first and second comparative images, determining an estimated location of the object after receipt of the second comparative image based on the detected moving direction and speed, and enlarging and capturing the object in the estimated location of the object.

Abstract: A method of recognizing a self location of an image acquisition device by acquiring an image of two or more reference objects is provided.