I forgot to metion that it would filter them in my HDD.

>in your HDD
DUHH


the existing software that is both extant and exists that finds identical files should reduce most of your storage overburden.

finding duplicate other sizes of the same image is compute intensive.
jpgs and other images get resized , cropped, memed, and quality-squished all the time. A tiny image patch test search index would reduce the time, but generate false positives. An area average grid of say 8x8 might compute a searchable index, with an adjustable similarity search to weed out the larger (or smaller) duplicates. I can't imagine that such software doesn't already exist.

using the indices would speed detection and then a pixel by pixel (upscaled/downscaled) search would positively identify dupes.


try this free program i found on SourceForge

http://sourceforge.net/projects/imagecomparator

>>14102104
Thanks! I'll try it. I was hoping it would be easy to detect same images in different sizes as google images can do it. I thought that there might be some light weight algorithm to do it.