DiffImg 2.2 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. You can run DiffImg on Windows XP/7/8/10/11 32-bit.
This free program was originally produced by TheHive. The software lies within Photo & Graphics Tools, more precisely Viewers & Editors. The most popular versions of the DiffImg 2.2, 2.1 and 2.0. The default filename for the program's installer is diffimg.exe.
From the developer:
DiffImg is a program that can compare two images and show the positions where pixels differ. DifffImg use OpenCV as backend so it can read and compare 8/16/24/32 bits images without problem but only single channel and RGB image has been take into account, so alpha channel isn't supported.
You may want to check out more software, such as Foto-Mosaik, MSR Group Shot or Photo Collector, which might be similar to DiffImg.