Can a JPEG compressed image be rotated without a loss in quality?

Question

JPEG is a lossy compression scheme, so decompression-manipulation-recompression normally reduces the image quality further for each step. Is it possible to rotate a

Answer 1

If it can help :

Trying to do better than the Microsoft (Windows 7) native picture viewer and its right-click rotation options, I tried several apps of the following link : http://jpegclub.org/losslessapps.html

For instance, I tried FastStone Image Viewer, XnView, Photosurfer, JPEG Lossless Rotator, ExifPro Image Viewer.

NONE of them yields a bigger picture than the basic Windows 7 picture viewer after a simple 90° rotation. It's admittedly limited to conclude so quickly, but I still don't have found a real lossless rotation .jpeg app for the moment, and in any case not better than the built-in Windows one.