摘要:底片颗粒噪声（film grain noise） 用照相底片记录信息时，因为底片是靠无数极细的卤化银颗粒来感光的，不管其颗粒多么细，它对空间频率的响应都是有限的，存在着一...
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film-grain noise 胶片颗粒噪声
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They are also quite useful in the analysis of noise problems, e. g. That of film grain noise.
它们对分析噪声问题(例如底片颗粒噪声)也是很有用的。
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Just as grain size in silver halide film ultimately limits the amount of detail you can see in a photograph, the background noise produced by the sensor does much the same in digital imaging.
ECONOMIST: A die-hard analog photographer goes digital
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