本国际标准规定了用于图像标记检索系统的16mm和35mm缩微胶片上记录的单尺寸图像标记和小、中、大图像标记的位置、大小和密度。它适用于检索系统中使用的16 mm和35 mm缩微胶片，无论用于生成原始或复制缩微胶片的方法和设备如何。

This International Standard specifies the location, size, and density of single-size image marks and small, medium, and large image marks recorded on 16 mm and 35 mm microfilm for use in image-mark retrieval systems. It applies to 16 mm and 35 mm microfilm used in a retrieval system, regardless of the method and equipment used to generate the original or duplicate microfilm.