一种超大图片的切分方法

A Cutting Method for The Large Picture

模拟地震资料抢救项目中抢救了一批石英伸缩仪和浮子水管仪等地形变记录的图纸,该类图纸为一个月记录一张,图纸规格为24 m×0.27 m。该抢救项目的原则是不能损坏原有图纸并且电子化的要求是600DPI,PNG24位。按照上述规定,每张电子化图片成果占用存储空间很大,约为10 GB左右,目前市面上的图片查看器和图片编辑器无法打开这么大的图片。为了解决上述问题,本研究开发了一种切图方案,把按月为单位记录的超大图片切分成按天为单位的小图,每张小图上都附有超大图纸的图章信息,每张小图大约为300MB左右,这种规格的图片可以正常打开。

A large number of drawings recorded by quartz extensometer and float tube tilt instrument and so on have been rescued in the analog seismic material rescue project,which kind of drawings is recorded monthly and the specification is about 24 meters mul⁃tiply 0.27 meters.The principle of this rescue project is not to damage the original drawings and the electronic requirement is 600DPI,PNG24bits.According to the above regulations,each electronic picture takes large memories,about 10GB memories,which cannot be opened by the picture viewer and picture editor on the market.At present,the picture viewer and picture editor on the market can't open such a large picture.In order to solve the above problems,this research developed a picture cutting method:the large picture re⁃corded in a month is divided into small pictures of each day according to the day.Each small picture is attached with the stamp informa⁃tion of the large picture.A small picture is about 300MB.The size of the drawing paper can be opened by the drawing software of the or⁃dinary computer or the software commonly used in the market,The problem that the drawing can't be opened is solved。