1. A method, comprising: analyzing respective visual features of local input image regions of an input image having a first pixel resolution to produce a result; based on the result of analyzing the visual features, deriving from the input image reduced-resolution visual representations of corresponding ones of the local input image regions; producing from the reduced-resolution visual representations a thumbnail image that reflects the arrangements, proportions and local details of the input image having a second pixel resolution lower than the first pixel resolution; and outputting the thumbnail image.