3 ms·
Could you elaborate on meaning of these?
by gesman 8y ago
Could you elaborate on meaning of these?
- pishpash 8y agoLooks like it's showing this: https://en.wikipedia.org/wiki/Error_level_analysis https://en.wikipedia.org/wiki/Error_level_analysis
- lolc 8y agoThey probably show a JPEG diff: The quantization errors introduced by JPEG-compression. This is relevant to the "fake" discussion because often the source material of shopped images is JPEG compressed and has JPEG-artifacts. If one combines source material of different shots their JPEG artifacts will likely not align because of the different resolution, offset, and compression levels of the parts. This means that the inserted parts of an image will have a different noise-profile which can often be spotted just by looking at the diff. I'm not trained to read these diffs and somebody who's cheating professionally would know to cover their tracks. So while they can be used to detect forgery they cannot disprove it.