Samsung Electronics Co., Ltd.

Seoul National University

Snu Rdb Foundation

Hyung-Jin Chang

Jin-young Choi

Dong-Hoon Jang

Byung-kwon Kang

Pyo-Jae Kim

Ha-wook Jeong

Jun-Mo Koo

Dong-Sung Song

An active attentional sampling technology for accelerating background subtraction from input videos, more specifically, an active attentional sampling technology for accelerating background subtraction by removing background region from the input video and then applying foreground probability map and sampling mask according to temporal property, spatial property and frequency property of the input video in favor of the pixel-wise background subtraction algorithm is provided. The background subtraction is accomplished by generating active attentional sampling mask for input video and then processing each frame of the input video only for regions corresponding to the sampling mask, which renders the background subtraction be much accelerated. That is, the present invention successfully speeds up pixel-wise background subtraction methods approximately 6.6 times without deteriorating detection performance. Therefore, according to the present invention, real-time detection with full-HD video is successfully achieved through various conventional background subtraction algorithms.

Active attentional sampling method for accelerating background subtraction

A hand-shake correction apparatus and method for a camera module for typical use in a mobile device. A camera unit includes an angular velocity sensor for sensing an angular velocity of a hand-shake motion of a camera, a position detection sensor for detecting a current position of an image sensor, and an actuator for actuating the image sensor. An Optical Image Stabilizer (OIS) circuit unit controls the actuator using a multi-rate Proportional Integrate Derivative (PID) control scheme that performs control a plurality of times using a shorter control period compared with existing PID controls for a basic period, in which a reference value is updated according to a control reference value by which the image sensor optimally shifts to correct a hand-shake motion.

Hand-shake correction method and apparatus of camera module for use in mobile device

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Seoul, South Korea

Hyung-Jin Chang