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, wherein the analyzing comprises determining a corresponding blur parameter value for each of the local input image regions; 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, wherein the deriving comprises determining respective reduced-resolution blur models representative of blur in the local input image regions based on the corresponding blur parameter values and, for each of the local input image regions: determining multiple reduced-resolution blur models, and selecting one of the blur models as the blur model representative of blur in the respective local input image region based on the corresponding blur parameter values; 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.