![]() In this case photo wouldn't be touched, but metadata - precisely "photo in photo". ![]() Some cameras adds really big thumbnail to JPEG files and Windows either removes it or changes it to own. Why size has changed? It's hard to tell without file. If your image browser have Exif rotation tag support, you'd see both photos the same. If you see both photos rotated it means that one have Exif rotation tag and second one is really rotated by Windows. Second one manipulates image data ("real" rotation), but without loosing data*. It's just data for image browser that it should show image rotated. ![]() Photo can be rotated losslessly in two ways (maybe more?). Why it's manipulated? Probably Windows rotates photo according to rotation tag from the camera. It shows as one in Windows Explorer, tho. Windows adds two tags, when it's rotating photo: Software (Exif) and CreatorTool (Exif).
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