| Presentation | 2023-02-02 [Invited Talk] The merits and demerits of the optical shot noise in digital imaging Seishi Takamura, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In CMOS image sensors, the reduction of dark current noise and readout noise, two of the three major image sensor noises, have been positively resolved, leaving only optical shot noise as the remaining noise factor. In order to reduce such noise, a process to reduce noise by digitally capturing a still scene many times and applying additive averaging is widely used, which is useful for increasing the number of gradations, improving image quality, and improving coding efficiency. In this paper, we theoretically consider optical shot noise, which is the dominant and unavoidable noise superimposed on images, and show that additive averaging may not approach the true value. Furthermore, by applying a correction based on theoretical values to conventional additive averaging, we show that the MSE can be reduced to 1/10 to 1/40 compared to additive averaging, and that, by taking advantage of the existence of optical shot noise, it is possible to sense brightness equivalent to about 1037, which exceeds the upper limit of 1023 in a 10-bit system, for example. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Noise reduction / Additive averaging / Optical shot noise / Poisson distribution |
| Paper # | IE2022-57 |
| Date of Issue | 2023-01-26 (IE) |
| Conference Information | |
| Committee | IE |
|---|---|
| Conference Date | 2023/2/2(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | NII |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Image Processing |
| Chair | Kazuya Kodama(NII) |
| Vice Chair | Hiroyuki Bandoh(NTT) / Toshihiko Yamazaki(Univ. of Tokyo) |
| Secretary | Hiroyuki Bandoh(KDDI Research) / Toshihiko Yamazaki(Nagoya Inst. of Tech.) |
| Assistant | Shunsuke Iwamura(NHK) / Shinobu Kudo(NTT) |
| Paper Information | |
| Registration To | Technical Committee on Image Engineering |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Invited Talk] The merits and demerits of the optical shot noise in digital imaging |
| Sub Title (in English) | Toward acquisition of true brightness |
| Keyword(1) | Noise reduction |
| Keyword(2) | Additive averaging |
| Keyword(3) | Optical shot noise |
| Keyword(4) | Poisson distribution |
| 1st Author's Name | Seishi Takamura |
| 1st Author's Affiliation | Hosei University(Hosei Univ.) |
| Date | 2023-02-02 |
| Paper # | IE2022-57 |
| Volume (vol) | vol.122 |
| Number (no) | IE-376 |
| Page | pp.pp.21-24(IE), |
| #Pages | 4 |
| Date of Issue | 2023-01-26 (IE) |