Open AccessIntegrated visual sensor with 2D/3D imaging and in‐situ proximity sensing for mobile devices
Author(s) -
Choi J.,
Choi O.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.1891
Subject(s) - image sensor , in situ , mobile device , computer science , remote sensing , computer vision , artificial intelligence , materials science , geography , operating system , meteorology
A low‐power visual sensor for low‐light 2D imaging, proximity sensing, and 3D depth imaging is presented; it is applicable to smart sensing applications such as user recognition under dark conditions, gesture sensing, and extended user interface/user experience (UI/UX) in mobile devices. With integrated background suppression circuits, the sensor provides in‐situ proximity sensing that generates a background‐cancelled proximity map while capturing 2D images. In addition, 3D depth images are provided based on stereo matching with two 2D images from the visual sensor and the existing camera module. The prototype sensor was fabricated with a 0.11 μm 1P4M CMOS image sensor (CIS) process. The power consumption is 1.98 mW (at 15 fps) from the sensor and 9.38 mW (at 16 ms on‐time) from the infrared LED.