Multi-spectral image fusion based on the characteristic of imaging system

For advancing the image quantity of multi-spectral and panchromatic images fusion, this paper presents an algorithm of multi-spectral image fusion based on the characteristic of imaging system. This algorithm firstly executes multi-resolution decomposition to multi-spectral and panchromatic images adopting with Nonsubsample contourlet transform, then establishes the panchromatic image injection model by analysising the imaging system characteristic of multi-spectral image in detail, and injects the detail information of panchromatic image to every spectrum of multi-spectral image by this model. At last, the decomposition coefficient is reconstructed by inverse nonsubsample contourlet transform so that the final fusion image is obtained. The experiment shows that the algorithm of this paper can not only fuses the detail information of panchromatic image adequately, but also retains the spectral characteristic of multi-spectral image better, reduces the spectrum distortion problem effectively.