Does Win Picture/Fax viewer recompress rotated jpegs?
Posted on 2009-05-04
Quick easy question:
When opening a jpeg photo in Windows Picture and Fax viewer I noticed that sometimes, when I rotate the image, it seems to save the rotated picture after. My question is:
Has it recompressed the rotated jpeg image when it saves it? If so, have I lost any image quality as a result and how much exactly? or is Windows picture viewer able to just mark some kinda tag in the jpeg to say that it's orientation has changed?
Does the above situation always hold true for a rotated jpeg, or does it only apply when I get the windows message telling me something like "your image is very large and windows cannot save it without some changes to the image, do you want to proceed?".
Any help much appreciated!