一种图式符号快速评价方法研究

图式符号色值和式样的评价是地图制图赛项中的一项重要内容,为提高评价效率,本文提出了一种快速评价方法。首先根据标准数据和对应地图图式进行数据预处理和矢量控制文件的制作;然后通过改进的Harris角点检测算法实现角点检测,并进行特征点匹配和几何校正;最后利用缓冲区分析进行符号色值评价,并基于图像矩理论结合GrabCut算法实现符号式样评价。本项技术成果已应用于地图制图赛项中图式符号的快速评价,在测绘地理信息行业职业技能竞赛中发挥了重要作用。

A Study on Rapid Evaluation Method of Cartographic Symbol

The color value and pattern of cartographic symbol must be evaluated correctly,which is an important part in cartography competition.In order to improve efficiency,this paper has proposed a rapid evaluation method.According to the standard data and corresponding cartographic symbol,data preprocessing and vector control documents has been done firstly.Then angular points has been detected through improved Harris algorithm,at the same time,the feature point matching and geometric correction has been realized.Finally,the color value has been evaluated by buffer analysis,and the pattern has been evaluated based on image moment theory and GrabCut algorithm.The technology has been applied to rapid evaluation of cartographic symbol in cartography competition,which played an important role in surveying and mapping geographic information industry vocational skills competition.