Robust depth sensing with adaptive structured light illumination

Authors:
Yueyi Zhang;Zhiwei Xiong;Pengyu Cong;Feng Wu
Affiliations:
University of Science and Technology of China, No. 96, Jinzhai Road, Baohe District, Hefei, Anhui 230026, PR China;Microsoft Research Asia, No. 5 Danling Street, Haidian District, Beijing 100080, PR China;School of Information and Electronics, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, PR China;Microsoft Research Asia, No. 5 Danling Street, Haidian District, Beijing 100080, PR China
Venue:
Journal of Visual Communication and Image Representation
Year:
2014

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Abstract

Automatic focus and exposure are the key components in digital cameras nowadays, which jointly play an essential role for capturing a high quality image/video. In this paper, we make an attempt to address these two challenging issues for future depth cameras. Relying on a programmable projector, we establish a structured light system for depth sensing with focus and exposure adaptation. The basic idea is to change current illumination pattern and intensity locally according to the prior depth information. Consequently, multiple object surfaces appearing at different depths in the scene can receive proper illumination respectively. In this way, more flexible and robust depth sensing can be achieved in comparison with fixed illumination, especially at near depth.