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A Three-Phase, One-Tap High Background Light Subtraction Time-of-Flight Camera.
- Source :
-
IEEE Transactions on Circuits & Systems. Part I: Regular Papers . Jun2019, Vol. 66 Issue 6, p2219-2229. 11p. - Publication Year :
- 2019
-
Abstract
- In this paper, a time-of-flight 3-D camera is presented for indoor/outdoor high-speed applications. A three-phase algorithm is proposed using one-tap/capacitor in-pixel background light subtraction. By integrating the background light only once, the standard four-phase time-of-flight operation is done in three-phases. The use of a single tap in the proposed pixel provides background light subtraction with lower mismatch and additionally, increases the camera speed. A $24 \times 24 $ pixel array image sensor, fabricated in AMS 0.35- $\mu \text{m}$ CMOS process is characterized in 2-D and 3-D mode for background light subtraction and distance estimation. The pixel pitch is $48~\mu \text{m}$ with 17.36% fill-factor. The sensor subtracts 125-klx background light with 8.2-cm distance offset at 80-cm object distance, without using an optical filter. The background-to-signal-ratio is 32.04 dB while frame-rate of the camera is 207 and 100 fps in 2-D and 3-D mode, respectively. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 66
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 136508888
- Full Text :
- https://doi.org/10.1109/TCSI.2018.2890050