环境卫星影像预处理顺序研究

首先,确定遥感数据辐射校正和几何校正的方法;然后,通过改变辐射/几何校正顺序,设计遥感数据预处理研究流程;最后,在整体上从图像的统计特征和纹理特征两个方面,定量分析辐射/几何校正的先后顺序对处理结果的影响。从统计/纹理特征两个方面对处理结果进行分析,发现校正顺序对结果的影响较小,说明辐射/几何校正顺序的差异对预处理结果的影响较小。

Preprocess Order of HJ Satellite Data

In the processing of mass remote sensing products production,the influence resul-ted from different radiometric and geometric correction orders has not been analyzed overall.So it is highly meaningful to quantitative analyze of the images discrepancy caused by differ-ent radiometric and geometric correction orders.It will help to clear the influences caused bythe changing correction orders,and also play a significant role on improving the accuracy ofquantitative products.We used HJ-1Bsatellite CCD data as fundamental datum and pro-cessed them.Firstly,integrating data characteristics,we determined methods of radiometricand geometric correction.Secondly,technology roadmap was designed by changing the radi-ation and geometric correction order.Finally,the results obtained by different orders of ra-diometric calibration and geometric correction were quantitative analyzed from two aspects ofstatistical characteristics and texture features of images.The experimental results showedthat in the statistical and texture indexes of results,most of them had little difference.Theexperimental results can prove a fact that different correction orders have a little influence onthe pretreatment results.