| Paper Abstract and Keywords |
| Presentation |
2024-03-27 10:30
A Dynamic-Range Extension Technique with Linear-Logarithmic Response for Short-Pulse Time-of-Flight Image Sensors
Tomohiro Okuyama, Keita Yasutomi, Keiichiro Kagawa, Shoji Kawahito (Shizuoka Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
This paper presents an extension of the dynamic range of a short-pulse indirect ToF (Time-of-Flight) range sensor with linear-logarithmic response readout. The dynamic range is extended without modifying the pixel circuit by using linear-logarithmic response in the SP iToF (short-pulse indirect ToF) pixel, but only by modifying the control signal. To linearize the ToF calculation in logarithmic region, a technique of restoring entirely linear signal from linear-logarithmic response using the proposed theoretical formula is investigated. The theoretical formula well explains the linear-logarithmic response obtained by circuit simulations. The non-linearity error of the restored linear output is 0.02 % to the full-scale range for the case that the dynamic range is extended by 30 times using a logarithmic response. The proposed technique is applied to the hybrid ToF distance measurements. It is demonstrated that the linearity is greatly improved even for objects emitting light 30 times greater than the maximum light. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Time-of-Fright / High dynamic-range / Short pulse / Indirect ToF / linear-logarithmic response / / / |
| Reference Info. |
ITE Tech. Rep., vol. 48, no. 15, IST2024-12, pp. 4-7, March 2024. |
| Paper # |
IST2024-12 |
| Date of Issue |
2024-03-20 (IST) |
| ISSN |
Online edition: ISSN 2424-1970 |
| Download PDF |
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| Conference Information |
| Committee |
IST |
| Conference Date |
2024-03-27 - 2024-03-27 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
IST |
| Conference Code |
2024-03-IST |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
A Dynamic-Range Extension Technique with Linear-Logarithmic Response for Short-Pulse Time-of-Flight Image Sensors |
| Sub Title (in English) |
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| Keyword(1) |
Time-of-Fright |
| Keyword(2) |
High dynamic-range |
| Keyword(3) |
Short pulse |
| Keyword(4) |
Indirect ToF |
| Keyword(5) |
linear-logarithmic response |
| Keyword(6) |
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| Keyword(7) |
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| 1st Author's Name |
Tomohiro Okuyama |
| 1st Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 2nd Author's Name |
Keita Yasutomi |
| 2nd Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 3rd Author's Name |
Keiichiro Kagawa |
| 3rd Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
| 4th Author's Name |
Shoji Kawahito |
| 4th Author's Affiliation |
Shizuoka University (Shizuoka Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2024-03-27 10:30:00 |
| Presentation Time |
20 minutes |
| Registration for |
IST |
| Paper # |
IST2024-12 |
| Volume (vol) |
vol.48 |
| Number (no) |
no.15 |
| Page |
pp.4-7 |
| #Pages |
4 |
| Date of Issue |
2024-03-20 (IST) |