ANSI IT2.40-2003 摄影用美国国家标准.胶卷(只在一侧显象)的均方根(rms)粒度.测量方法

标准号：ANSI IT2.40-2003
中文标准名称：摄影用美国国家标准.胶卷(只在一侧显象)的均方根(rms)粒度.测量方法
英文标准名称：American National Standard for Photography – Root Mean Square (rms) Granularity of Film (Images on One Side Only) – Method for Measuring
标准类型：G81
发布日期：2003/1/22 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G81
国际标准分类号：37.040.20
引用标准：ISO 5-1-1984(R1989);ISO 5-2-2001;ISO 5-3-1995;James, T.H., Ed. The Theory of the Photographic Process. 4th ed. New York: Macmillan;1977: 618-628.;Trabka, E.A. Relationship between RMS density and transmittance fluctuations of photographic film. Journal
适用范围：This standard describes a method for the determination of the granularity of photographicfilms by scanning with a suitable microdensitometer. Continuous-tone black-and-white andcolor materials coated on a transmitting support may be measured by the proceduresdescribed. The concept of granularity applies to both reflecting and transmitting materials,and techniques that are basically similar to those described in this document can be used toevaluate reflection materials. However, this document is concerned only with samplescoated on transmitting supports.As noted in the Foreword, two other types of granularity measurements are not treated inthis document. First, no specifications are given for measuring films that have emulsioncoated on both sides of the support. Second, this document does not treat the measurementof the Wiener (or “power”) spectrum.