Search found 2 matches
- Mon Dec 07, 2009 3:49 am
- Forum: Classic - General Support
- Topic: Lossless JPEG rotation only lossless at 360 degrees?
- Replies: 3
- Views: 5880
Re: Lossless JPEG rotation only lossless at 360 degrees?
I have carried out additional tests that shed more light on the situation. It seems that XnView produces an output identical to jpegtran, which is the set of lossless algorithms in the libjpeg library. I suspect the problem is either caused by some orientation-dependent decoding step (which I have ...
- Tue Dec 01, 2009 5:47 am
- Forum: Classic - General Support
- Topic: Lossless JPEG rotation only lossless at 360 degrees?
- Replies: 3
- Views: 5880
Lossless JPEG rotation only lossless at 360 degrees?
Potential Problem:
While trying out the lossless JPEG rotation feature in XnView 1.97, I found something strange:
The rotation appears to be "lossy" for rotations of 90, 180, and 270 (e.g. 90 + 90 + 90) degrees. However, if I continue rotating until the image has the original orientation (e.g ...
While trying out the lossless JPEG rotation feature in XnView 1.97, I found something strange:
The rotation appears to be "lossy" for rotations of 90, 180, and 270 (e.g. 90 + 90 + 90) degrees. However, if I continue rotating until the image has the original orientation (e.g ...