Dr. Baocheng Hua Profile

Dr. Baocheng Hua

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Proceedings Article | 30 April 2024 Paper

Establishment and verification of energy simulation model of time-of-flight depth camera

Jiaxin Liu, Xin Guan, Zhongxiang Cao, Baocheng Hua

Proceedings Volume 13155, 1315508 (2024) https://doi.org/10.1117/12.3013354

KEYWORDS: Time of flight cameras, Cameras, Device simulation, Modulation, Reflection, Light sources and illumination, Infrared radiation, 3D image processing

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In this paper, we establish a full-physical simulation model of a time-of-flight camera for the vertical imaging ranging application scene, from the exit of light to the output of depth and gray information. Firstly, according to the prior information such as the distance of the object to be detected and the illumination power of the active light source, we determine the energy and photo-generated charge amount of a single pixel entering the imaging target of the time-of-flight camera in a certain integration time. Furthermore, according to the modulation and demodulation principle of the time-of-flight camera, the input and output optical signals are cross-correlated sampled, and we can obtain the four-phase light intensity value output by the time-of-flight camera in an integration time. Finally, we calculate the gray value and depth value for the four-phase light intensity value according to the depth measurement principle of the time-of-flight camera. Experiments show that the gray and depth values obtained by the model simulation match the actual situation, and the model has a certain universality. In practical engineering applications, the model can be used to simulate the light intensity and depth information, instead of ordinary experiments, and improve efficiency.

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