Technical drawings - general principles of presentation - part 20 : basic conventions for lines iso 128 - 20 : 1996 ; german version en iso 128 - 20 : 2001 技术制图.图象表示的一般原则.第20部分:线条的基本惯
Technical drawings - general principles of presentation - part 21 : preparation of lines by cad - systems iso 128 - 21 : 1997 ; german version en iso 128 - 21 : 2001 技术制图.图象表示的一般原则.第21部分:采用计算机辅
Information processing . coded representation of pictures . part 1 : encoding principles for picture representation in a 7 - bit or 8 - bit environment 信息处理.图象的编码表示.第1部分: 7位或8位数环境下图象表示的编码原则
We also present compression and simplification methods of point cloud surfaces based on the geometry image representation . this thesis is organized as follows . chapter 1 introduces related concept and previous work 在点云曲面的几何图象表示的基础上，实现了点云曲面的其它一些应用，如压缩、简化等。
From the point cloud surfaces , multi - layered geometry images are created which can represent the original models accurately very much . the compounded geometry image representation of point cloud surfaces , is also based on the former transform method , where the difference lies : take one of coordinates as the gray value and another two as location respectively , three different geometry images can be created . three gray images are combined into a compounded color image 点云曲面的复合图象表示方法，首先把点云曲面中点的笛卡尔坐转换为球面极坐标，分别把球面极坐标[ r ， ， ]中的一个坐标转换为象素的灰度值，另外两个量转换为该象素的坐标，这样就可以得到三幅不同的图象，把这三幅灰度图象分别对应到彩色图象的r ， g ， b中去，就组合成为一幅复合彩色图象。
