Methods of fused image analysis and assessment

The widespread use of image fusion - combining images of different modalities - is finding increasing application in f ields such as, for example, medical imaging, remote sensing and surveillance. C onsequently, the ability to assess the fused images accurately has become of gr eat importance. In this correspondence, the differences between conventional image quality measures and composite image assessment are outlined and the image fusion assessment methods are covered with examples of both the objective quality measures and psychophysical testing techniques.