Robust depth sensing with adaptive structured light illumination |
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Affiliation: | 1. School of Physics, Shandong University, Jinan 250100, China;2. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China;3. Department of engineering mechanics, Dalian University of Technology, Dalian 116024, China;4. School of civil engineering and architecture, Jinan University, Jinan 2250020, China;1. Guangdong University of Technology, Guangzhou 510006, PR China;2. Guangdong Engineering Center of Auto-detection Technology for Intelligent Manufacturing, Guangzhou 510006, PR China |
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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. |
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Keywords: | Depth sensing Depth camera Structured light Speckle Defocus Overexposure Underexposure Adaptive illumination |
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