论文部分内容阅读
对遥感图像融合Brovey变换法存在颜色失真的现象,本文提出了一种小波比值融合法,该融合法首先对高几何分辨率的全色波段进行小波变换提取其低频分量,并对其进行三次卷积法重构得到与原分辨率相同的图像,而后将低分辨率多光谱图像与全色波段图像相乘,再除以重构后的全色波段图像,便得到融合图像。并从目视评价、GVI、统计评价证实了该小波比值融合法优于Brovey变换法,该比值融合法是一种能较好地保全低分辨率多光谱图像颜色的融合方法。
In this paper, we propose a wavelet ratio fusion method, which firstly wavelet transform the panchromatic bands with high geometric resolution to extract the low frequency components and perform the third-order volume transformation on the remote sensing image fusion Brovey transform. The product is reconstructed to obtain the same resolution as the original image, and then the low-resolution multispectral image is multiplied by the panchromatic image, and then divided by the reconstructed panchromatic image to obtain the fused image. From the visual evaluation, GVI and statistical evaluation, the wavelet ratio fusion method is better than the Brovey transform method, which is a fusion method that can preserve the color of low resolution multispectral images.