| 一种自动提取栅格数据中空间实体的算法 |
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| 引用本文： | 李颖,陈永良,刘光胜,赵文吉. 一种自动提取栅格数据中空间实体的算法[J]. 吉林大学学报(地球科学版), 2004, 34(1): 146-149 |
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| 作者姓名： | 李颖 陈永良 刘光胜 赵文吉 |
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| 作者单位： | 吉林大学,计算机科学与技术学院,吉林,长春,130012;吉林大学,综合信息矿产预测研究所,吉林,长春,130026;首都师范大学,地理系,北京,100037 |
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| 摘 要： | 栅格数据是一类特殊的图像,准确地提取这类图像中的空间实体并矢量化表示对于这类图像的应用研究非常重要.针对栅格数据的特点,提出了一种自动提取栅格数据中空间实体边界的一种算法.算法的时间复杂度与数据总量的大小、数据中空间实体的类型和数目等因素有关.在MapInfo平台中用vB 6.0开发了该算法的程序,通过一个简单实例验证了算法的可行性和实用性.
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| 关 键 词： | 栅格数据 实体 边界 算法 |
| 文章编号： | 1671-5888(2004)01-0146-04 |
| 修稿时间： | 2003-01-13 |
An algorithm for automatic extraction of spatial entities from raster data |
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| LI Ying. An algorithm for automatic extraction of spatial entities from raster data[J]. Journal of Jilin Unviersity:Earth Science Edition, 2004, 34(1): 146-149 |
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| Authors: | LI Ying |
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| Abstract: | Raster data is a special type of image. Precisely extracting and vectorized representing spatial entities in the image is very important for the research of the image application. Considering the features of raster data, the authors have proposed an algorithm for automatic extracting spatial entities from raster data. The temporal complexity of this algorithm is related to both the size, the types and the numbers of the spatial entities in the data. A program for this algorithm has been developed in VB 6.0 on MapInfo platform. The feasibility and practicality of the algorithm has been proved by a simple example. |
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| Keywords: | raster data spatial entity automatic extraction algorithm |
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