优化栅格细化算法的线状地物提取  

Line Object Pick-up Based on Improved Grid Thinning Algorithm

作　　者：张欣[1] 陈国雄[2] 钟耳顺[1] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]中国科学院地理信息产业发展中心,北京100101

出　　处：《地球信息科学》2007年第3期25-27,共3页Geo-information Science

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.

关 键 词：栅格细化算法 半自动跟踪 中心线提取 

分 类 号：P208[天文地球—地图制图学与地理信息工程]