摘要
影像动态裁剪在影像分析、运算和处理中具有重要的作用,基于ArcGIS影像分析工具提供的裁剪功能,分析了裁剪函数标准模板的数据结构,利用Python脚本从影像文件和矢量文件中读取信息,构建裁剪函数模板所需参数值,实现程序化影像动态裁剪。与基于磁盘输出的传统方式和基于内存输出的改进方式相比,效率提高显著,而且处理时间几乎不受影像容量和矢量图形复杂度影响,在实际工作中具有重要的应用价值。
Image dynamic clipping plays an important role in image analysis,calculation and processing.Based on the clip function provided by ArcGIS image analysis tool,the data structure of the standard clip function template is analyzed,and the information is read from the image file and the vector file by using Python script.The parameter values required for the clip function template are constructed to realize dynamic clipping image programmmed.Compared with the traditional method based on disk output and the improved method based on memory output,the efficiency is improved significantly,also the processing time is hardly affected by image capacity and vector graphics complexity,and has important application value in practical work.
作者
高磊
GAO Lei(Survery Engineering Institute of Jiangsu Province, Nanjing Jiangsu, 210013, China;Key Laboratory of Satellite Mapping Technology and Applications, National Administration of Surveying, Mapping and Geoinformation, Nanjing Jiangsu 210013, China)
出处
《北京测绘》
2020年第2期172-175,共4页
Beijing Surveying and Mapping
基金
地理国情监测国家测绘地理信息局重点实验室开放基金(2017NGCM10)
关键词
遥感
影像裁剪
栅格函数
remote sensing
image clipping
raster function
