In various embodiments, a first plurality of digital images captured by a first camera (256, 456, 1156) of a first area may be categorized (1202-1210) into multiple predetermined categories based on visual attribute(s) of the first plurality of digital images. A second plurality of digital images captured by a second camera (276, 376, 476, 1176) of a second area may be categorized (1302-1310) into the same predetermined categories based on visual attribute(s) of the second plurality of digital images. After the second camera acquires (1402) a subsequent digital image depicting an unknown subject in the second area, the subsequent digital image may be categorized (1404-1406) into a given one of the predetermined categories based on its visual attribute(s), and then adjusted (1408) based on a relationship between the first plurality of digital images categorized into the given category and the second plurality of digital images categorized into the given category.