1. A method of generating an assembled group image from subject images, the method comprising: determining a preliminary arrangement for the subject images, the preliminary arrangement including preliminary subject positions; determining vertical shift factors using subject height data; generating with at least one computing device a final arrangement for the subject images, the final arrangement including final subject positions that are vertically shifted from the preliminary subject positions by the vertical shift factors; and generating, by the at least one computing device, the assembled group image by arranging the subject images at the final subject positions.