SAR影像与TM影像的几种融合处理方法

利用彩色空间变换、比值变换及相关系数法分别对SAR影像与TM3 、TM4 、TM5 三波段影像进行融合处理。文章介绍了影像融合中的具体技术问题及其处理方法。因侧视雷达图像一般有明显的孤立噪声,所以,在进行影像融合处理之前,先对SAR影像进行预处理,文中用δ滤波法抑制孤立噪声(光斑) .最后,从视觉效果、熵、平均梯度值以及标准差等4 方面评价了影像融合的质量。

THE FUSION APPROACHES FOR SAR AND TM IMAGES

The methods of color_space transformation, ratio transformation and the correlation coefficient have been discussed in this paper for image fusions of SAR and TM band 3,4,5 respectively, in order to get the enhanced images. The details of techniques and processing methods during the image fusion have been introduced. Because of the obvious noises within SAR image, the δ filtering as preprocessing for noise removal before image fusion should be considered. The image quality evaluations after fusion could be implemented by visual effects, eutropy, average gradiant and standard deviation. The results show that the informations of fusion images are richer and clearer than the raw ones'.