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Image-difference prediction: From color to spectral

: Le Moan, Steven; Urban, Philipp


IEEE transactions on image processing 23 (2014), No.5, pp.2058-2068
ISSN: 1057-7149
ISSN: 1941-0042
Journal Article
Fraunhofer IGD ()
image quality; Color analysis; color perception; multispectral images

We propose a new strategy to evaluate the quality of multi and hyperspectral images, from the perspective of human perception. We define the spectral image difference as the overall perceived difference between two spectral images under a set of specified viewing conditions (illuminants). First, we analyze the stability of seven image-difference features across illuminants, by means of an information-theoretic strategy. We demonstrate, in particular, that in the case of common spectral distortions (spectral gamut mapping, spectral compression, spectral reconstruction), chromatic features vary much more than achromatic ones despite considering chromatic adaptation. Then, we propose two computationally efficient spectral image difference metrics and compare them to the results of a subjective visual experiment. A significant improvement is shown over existing metrics such as the widely used root-mean square error.