1. A method, comprising: using a computer or processor to transform an image representation into a two dimensional spatial map to predict which parts in said image may be perceived as visually conspicuous by a human observer, the transforming comprising: using the computer or processor to obtain information about the image in at least a first spectral range and a second spectral range that is a different spectral range than said first spectral range; and using the computer or processor to correlate said information about the image in said first spectral range to information in said second spectral range, determine salient portions of the image from said correlating, without looking for specific content of the image.