术语 | reduction ratio |
释义 | reduction ratio 压缩比,缩小率 A measure of the number of times a linear dimension of a document is reduced when photographed onto microfilm, expressed as 16x,24x.If a drawing measuring 18 inches ×24 inches is microfilmed at 10x, the image will measure 1.8×2.4. 一种线性压缩倍数的量度,表示为16x,24x等(其中x为放大率的代表符号)。当把 某种资料摄成缩微胶片时,需要将资料按某个线性倍率进行压缩。如果将一个18英寸×24英 寸的画面按10x的比例摄成缩微胶片,则得到1.8英寸×2.4英寸的图象。 |
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