1. A method comprising: receiving an image-processing request relating to user images from a user; classifying said user images into user-request image-element categories using a processor of a computerized device; retrieving previously stored user-specific preferences, from a non-volatile computer storage medium using said processor, that correspond to said user-request image-element categories into which said user images are classified, said previously stored user-specific preferences resulting from said user participating in a previous image rendition preference survey, and said previously stored user-specific preferences being previously stored preference data, input by a plurality of different users; obtaining additional user-specific preferences by having said user participate in additional image rendition surveys for ones of said user-request image-element categories for which corresponding previously stored user-specific preferences are absent from said non-volatile computer storage medium; deriving recommended renditions for said user images according to said previously stored user-specific preferences and/or said additional user-specific preferences retrieved based on said user-request image-element categories into which said user images are classified; and processing said image-processing request using said processor by altering renditions of said user images according to said recommended renditions.