摘要
栅格细化算法是处理栅格矢量数据相互转换的常用算法。本文对该算法进行了优化处理,实现了栅格矢量化半自动跟踪和面状地物中心线提取。两种功能的实现都采用人机交互的策略,可以实时、有选择性地提取结果。在栅格转矢量过程中对栅格底图的颜色和质量要求不高,转换速度快、精度高、实用性强,不受内存等硬件限制,可用于GIS数据处理软件,便于推广。
Grid thinning algorithm is a popular algorithm in grid-vectorization. This paper not only improved this algorithm but also implemented semi-automatic tracking grid-vectorization and central line pick-up using this algorithm. Both of the two methods need the interaction with computer, and can vectorize the grid data on the fly and on demand. Furthermore, this grid-vectorization method has many advantages, such as low requirement of the gird data color and quality, high quality conversion results, high efficiency, practicality, no strict with the hardware such as memory, easier integration with GIS software, etc.
出处
《地球信息科学》
CSCD
2007年第3期25-27,共3页
Geo-information Science
关键词
栅格细化算法
半自动跟踪
中心线提取
grid thinning algorithm
half automatic tracking
central line pick-up
