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Regarding JPEG compression, there used to be a site that would make a heatmap of JPEG-induced noise for a given image, so you could see hotspots where it looked
by TazeTSchnitzel 9y ago
Regarding JPEG compression, there used to be a site that would make a heatmap of JPEG-induced noise for a given image, so you could see hotspots where it looked like it had been compressed twice (i.e. manipulated).
- Nanite 9y agoThis one by any chance? https://29a.ch/photo-forensics/#forensic-magnifier https://29a.ch/photo-forensics/#forensic-magnifier
- pacaro 9y agothis is fun! It's noteworthy that the first image in TFA doesn't have obvious signs of tampering in that tool
- joshu 9y agoELA? Error Level Analysis?
- joecool1029 9y ago>ELA? Error Level Analysis? Yeah, that was it. They shut it down but still have an info page on it: http://www.errorlevelanalysis.com/ http://www.errorlevelanalysis.com/
- eli 9y agoIt's easy to spoof if you try though, so it only works to detect unsophisticated forgeries.
- TazeTSchnitzel 9y agoThat's the one I was thinking of, yes.