Information Influence on QuickBird Images by Brovey Fusion and Wavelet Fusion
Brovey 融合与小波融合对QuickBird 图像的信息量影响

Image fusion is the most effective technological means to deal with multi-sources remote sensing images.Choosing the best fusion is a key to improve the picture quality according to different data sources.This paper tests to merge panchromatic wave band images and multi-spectrum wave band images of QuickBird on the basis of the theory,algorithm and the merging course of Brovey fusion and Wavelet fusion,then analyzes and evaluates the two merging results from quality and quantity respectively.Qualitative analysis includes hue,texture and definition,and quantitative analysis includes entropy,average gradient and spectrum authenticity.The testing result shows: the image adopting Wavelet fusion keeps higher resolution ratio and better spectrum character;the image adopting Brovey fusion may keeps high resolution ratio,but spectrum information loses relatively heavy,so Brovey fusion is not suitable for dealing with QuickBird remote sensing images.