Search found 3 matches
- 2014-01-07T12:42:47-07:00
- Forum: Bugs
- Topic: Enabling Reversible Integer Transforms in JPEG 2K Encoder
- Replies: 4
- Views: 5805
Re: Enabling Reversible Integer Transforms in JPEG 2K Encode
Also, the fnord Jpeg2000 plugin for After Effects is able to render lossless 16-bit RGB J2K sequences at ~1.7mb per image (1920 x 1080). How on earth is it able to do this? Imagemagick's files are 7mb in lossless mode. Edit: Never mind; I had the floating-point option enabled, which doesn't allow ...
- 2014-01-01T11:11:56-07:00
- Forum: Bugs
- Topic: Enabling Reversible Integer Transforms in JPEG 2K Encoder
- Replies: 4
- Views: 5805
Re: Enabling Reversible Integer Transforms in JPEG 2K Encode
Have you tried a more recent version of IM? With the current v6.8.8-0 on Windows 8, in my initial experiments JP2 is lossless, as measured by: convert a.tiff a.jp2 compare -metric RMSE a.tiff a.jp2 NULL: where a.tiff is a 16-bit/channel photograph or 8-bit/channel graphic. Mind you, it only saves ...
- 2013-12-31T21:41:04-07:00
- Forum: Bugs
- Topic: Enabling Reversible Integer Transforms in JPEG 2K Encoder
- Replies: 4
- Views: 5805
Enabling Reversible Integer Transforms in JPEG 2K Encoder
Since IM's JPEG 2000 encoder does not have an option to enable reversible color transforms (RCT), its lossless mode isn't truly lossless because there will be errors resulting from the RGB conversion. I went and did some reading online and none of the archiving professions invested in JPEG 2000 ...