Abstract:
A user authentication method includes extracting a facial landmark from each of a first input image and a second input image; generating a first sparse code of the facial landmark extracted from the first input image and a second sparse code of the facial landmark extracted from the second input image; and determining whether a user is to be authenticated based on the first sparse code of the first input image and the second sparse code of the second input image.
Abstract:
An apparatus for processing a depth image using a relative angle between an image sensor and a target object includes an object image extractor to extract an object image from the depth image, a relative angle calculator to calculate a relative angle between an image sensor used to photograph the depth image and a target object corresponding to the object image, and an object image rotator to rotate the object image based on the relative angle and a reference angle.
Abstract:
At least one example embodiment discloses an apparatus for sensing an object, the apparatus including a display, a light source configured to emit light toward the display, a pattern layer on the display, the pattern layer including a first pattern for identifying a position on the display, a camera configured to generate a pattern image based on light reflected off of the pattern layer, and a controller configured to adjust an operation of at least one of the light source and the camera based on a second pattern displayed in the pattern image.