DiffImg - the free tool for pixel-by-pixel comparison of digital images
Virtually any personal digital photo archive you can find a large number of identical images. Of course, most users would like to get rid of duplicates that occupy precious disk space. The easiest method to quickly identify similar images is to compare the sizes of files. However, for more precise and accurate analysis, you will need additional tools. One such tool is a free application called DiffImg, allowing to identify the differences between the two images at the level of individual pixels.
DiffImg boasts support for most common file formats (BMP, PNG, GIF, ICO, JPG, MNG, PBM, PGM, TIFF, PPM, TGA, XBM and XPM). According to the developers, this list can be added by installing the appropriate extensions. Working with the tool starts with the selection of compared images. DiffImg analyzes user image for a few seconds and highlights the differences found by the pixel mask.
