High-speed depth-mapping axi-vision camera with compact optical system

Tahito Aida; Takeshi Uragaki; Masahiro Kawakita; Yutaka Tomita; Ryoji Tsunoi; Satoshi Yahagi; Minoru Tanaka; Hideyuki Mitake; Masayuki Tawara

doi:10.1117/12.767460

25 February 2008 High-speed depth-mapping axi-vision camera with compact optical system

Tahito Aida, Takeshi Uragaki, Masahiro Kawakita, Yutaka Tomita, Ryoji Tsunoi, Satoshi Yahagi, Minoru Tanaka, Hideyuki Mitake, Masayuki Tawara

Author Affiliations +

Proceedings Volume 6805, Three-Dimensional Image Capture and Applications 2008; 680511 (2008) https://doi.org/10.1117/12.767460
Event: Electronic Imaging, 2008, San Jose, California, United States

Abstract

We have developed an improved version of a high-definition real-time depth-mapping Axi-Vision Camera that enhances the speed of the depth detection, reduces external light interference, and is more compact. The new depth-detection method uses a high-resolution, fast-frame-rate CMOS sensor with a rolling shutter. The depth is calculated from four near-infrared light (NIR) images in successive video frames to cancel the effects of external light interference. Therefore, the external light interference immunity is improved so that the depth information can be detected accurately under external light at an intensity up to 30% of that of NIR light illumination. Furthermore, the compact-imaging optical system is achieved by using a specially designed HDTV camera lens, which internally separates only NIR light and provides NIR images on an image intensifier coupled with a CMOS sensor. Further compact sizing of the camera system is achieved by arranging specially developed small, high-power reflection-type LED arrays for the NIR illumination around the camera lens. As a result of this compact sizing, the volume is 1/5 that of the prototype system. We also demonstrated a method to obtain 3-D information from image data captured by this Axi-Vision Camera.

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Tahito Aida, Takeshi Uragaki, Masahiro Kawakita, Yutaka Tomita, Ryoji Tsunoi, Satoshi Yahagi, Minoru Tanaka, Hideyuki Mitake, and Masayuki Tawara "High-speed depth-mapping axi-vision camera with compact optical system", Proc. SPIE 6805, Three-Dimensional Image Capture and Applications 2008, 680511 (25 February 2008); https://doi.org/10.1117/12.767460

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