摘要
对彩色地图中等高线提取方法进行了研究。在归纳总结提取步骤基础上,提出了一种新的分色方法:将像素亮度因素加入到了颜色判断公式中,同时结合了地图空间关系的分色方法。此外,依据等高线自身的特点,分析并改进了Zhang快速并行细化算法,以及变步长跟踪矢量法等。经研究可以得出,通过上述提取过程,可提高轮廓的识别质量,避免数据丢失,且当遇到断点时,可通过自动增加步长来跨越断点,同时实现了边跟踪边压缩,具有一定的实用性。
The method for extracting the contour lines in colorful maps is studied. On the basis of summarized extraction steps, a new method is put forward by introducing the pixel brightness factor into the color judgment formula and combining the map color separation method of spatial relations. Besides, based on the characteristics of the contour itself, Zhang fast parallel thinning algorithm and the variable step tracking method for vector are improved. This extracted method improves the quality of the contour recognition and is capable of increasing step automatically across breakpoints, realizing tracking and compression at the same time
出处
《电子科技》
2017年第6期131-134,共4页
Electronic Science and Technology
关键词
彩色地图
等高线提取
分色
细化
矢量化
color map
contour lines extraction
color separation
thinning
vector
