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題 名 | 攝影底片的訊噪比 |
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作 者 | 王為豪; | 書刊名 | 臺北天文館學報 |
卷 期 | 1 民92.12 |
頁 次 | 頁84-90 |
分類號 | 322.3 |
關鍵詞 | 業餘天文; 底片; 訊噪比; Amateur astronomy; Photographic film; Signal-to-noise ratio; |
語 文 | 中文(Chinese) |
中文摘要 | 鑑於底片在業餘天文觀測上仍扮演重要角色,我以家用平臺式掃瞄器量測市面上三款攝影底片-Kodak E200正片、Fuji Provia 400F正片、及Konica Centuria 400負片-在不同曝光量以及不同顯影下的訊噪比。我比較了正負片的訊噪比,push對訊噪比以及動態範圍的影響,以及比較底片的雜訊表現與Poisson雜訊的不同。這些量測結果有助於我們擬定觀測策略。 |
英文摘要 | In consideration of the fact that photographic films are still playing a significant role in amateur astronomical observations, I measured the signal-to-noise ratios (S/N) of three commercial films under different exposures and different developments. The films are color reversals Kodak E200 and Fuji Provia 400F, and color print Konica Centuria 400. The measurements were done with commercial flatbed scanners. I compared the S/N of these films, as well as the influence of pushing processing on S/N and dynamic range. I also compared the noise behavior of these films with Poisson noise. The results of the measurements are useful for making an observing strategy. |
本系統中英文摘要資訊取自各篇刊載內容。