The Research On Processing Methods Of ZY-3 Satellite Images Based On The National 1:50000 Topographic Database Dynamic Update

In January 9,2012 China's first civilian surveying and mapping ZY-3 Satellite was successfully launched,the more and more image data from ZY-3 Satellite back to ground applies to the production of surveying and mapping in recent years.Along with the work of the national 1:50000 topographic database dynamically update is carring out comprehensive,rapid and efficient processing method of the research about ZY-3 Satellite images applied to find and update of topographic factors change is particularly urgent and important.With this purpose,this paper mainly from the following several aspects analysis and study comprehensive:(1)The fast matching about ZY-3 Satellite images and orthorectification method were determined by experiments,and the results were statistically analyzed and evaluated.(2)According to the different situation the test image fusion is developmented,ultimately determine the better fusion effect about ZY-3 Satellite images is the Pansharp method and Pansharp2 method of the PCI software,Pansharp2 method is more suitable for production standard DOM,Pansharp method is more suitable for the topographic factors update.(3)According to the topographic factors update,A band combination method of fusion image was proposed,the results showed that the combined ratio of green band and near infrared band as the best 9:1,and is suitable for most of the image,but the vegetation cover better regional image can not combinate.(4)The experiment of topographic factors update based on image is developmented,and through the analysis on the experimental results again verified the correctness of image processing methods.