On the fusion of multi-sensor images: The multiresolution approaches

The advance of multi-sensor imaging systems enables the capability of producing multiple image modalities across the electromagnetic spectrum bands. These multi- modality images should be combined together to generate a composite image, which is able to display plenty of information captured by the system. The technique named image fusion is developed for this purpose. Varies of image fusion approaches have been presented in the literature, a popular category of which is the multiresolution im- age fusion (MRIF). This chapter reviews the state of the art of the MRIF algorithms and the performance assessment issue in image fusion. The mechanism and applica- tions of the MRIF are described. However, there is not a universal solution for all applications. The image fusion algorithm must be carefully selected or tailored based on the specific requirements of an application. This chapter discusses these relevant issues as well.