1. A method for automated selection of image regions (“tiles”) in an overall image, the method comprising: a) generating a computed image from at least one of a co-occurrence matrix of the overall image and an entropy image of the overall image, the computed image distinguishing between tiles on the basis of whether they are relatively more or relatively less likely to exhibit a property of interest; b) selecting a prior subset of the tiles which are relatively more likely to exhibit the property of interest; c) for tiles in the prior subset, deriving a feature measure associated with at least one of colour and texture; and d) selecting from the prior subset a further subset of tiles at least partly on the basis of tile feature measures.