中国空间科学技术

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数字图象表示的GD方法及其变形GD13方法

王彦广;   

  1. 北京卫星信息工程研究所,
  • 发布日期:1987-10-25

REPRESENT DIGITAL PICTURE BY GD AND GD13 REPRESENTATIONS

Wang Yanguang (Beijing Institute of Satellite Information Engineering)   

  • Published:1987-10-25

摘要： 本文给出了一种属于线性四元树的图象表示方法—GD法(灰度值,阶数)并讨论了GD表示与CD表示以及与QC表示之间的关系;其次给出了GD表示、矩阵表示以及栅格表示等的转换算法;最后,针对常见的256个灰度级的图象,讨论了GD13方法。

关键词: 图象处理, 数字信息处理, 数据库, 遥感技术, 方法

Abstract: In this paper, first, a linear quadtree representation——GD (standing for)representation is given. And its space requirement is the same as CD's. Then, the relations between GD and CD, GD and QC are discussed, and several conversion algorithms, such as matrix to GD, GD to matrix, raster to GD are given. Finally, for 256-level picture, the GD13 method—the voriant of GD is obtained. It's worth mentioning that the space requirement of GD13 method is not more than that of matrix method.