Multiscale Directional Bilateral Filter Based Fusion Of Satellite Images

The fusion of multispectral and panchromatic satellite images is widely used in remote sensing community to obtain high resolution images both in spatial and spectral domains. One approach is to obtain PAN image details through a multiresolution decomposition such as wavelet transform and inject them to the low resolution MS image. However this process may lead to redundant detail injection, resulting to artifacts and overenhancement in the fusion results. In this paper, we propose to decompose the PAN image using a multidirectional bilateral filter. Obtained detail layers contain both resolution and direction information. By the appropriate selection of these layers, it is possible to perform a proper detail injection visual and quantitative results for Quickbird images are presented to validate the proposed method.