JPEG CAN EXPOSE YOU ▪ You can clean the file, resave it, “polish” the details… But compression has already recorded its history. ▪ JPEG operates on an 8×8 grid. And every save leaves a trace. – blocks start to shift relative to the scene – double compression breaks the structure –...

JPEG IS SNITCHING ON YOU ▪ Think “saved it – all good”? JPEG has already left traces. ▪ 🔍 How it gets detected → 8×8 blocks – a structure that shouldn’t break → double compression – shows the file was reprocessed → editing artifacts – noise, halos, “dirty” edges ▪ ⚙️ Visually...