Some time ago I received a digital camera; however, due to diskspace shortage I need to clean up my home directory. One of the directories that eats most of my sectors is one where I store all my pictures.
I know I have a lot of duplicate pictures, pictures deduced from master pictures (lower resolution, some editing) and similar pictures (same scene taken 4 or 5 times with different camera settings, hoping to get at least one good shot) but managing them wasn't easy.
I now played a bit with gqview and this tool seems to provide some features I find very interesting; one of them is the "find duplicates" where you can even search for pictures with "similar" content and I must say that it does work. Of course, nothing is perfect, but I've managed to clean up the picture directory so it works for me.