Free JPEG2000 Photoshop plugin (PC and Mac)
Posted: 20.02.2003, 18:36
Hi all,
There are two free plugins availble JPEG2000 and SuperPNG. I've tested in Photoshop but they should also work in PSP. You can find it here: http://www.fnordware.com
I think JPEG2000 is a good format to save large maps on web space.
Bye Jens
There are two free plugins availble JPEG2000 and SuperPNG. I've tested in Photoshop but they should also work in PSP. You can find it here: http://www.fnordware.com
Some notes by the developer:
j2k reads and writes JPEG 2000 files. Because JPEG 2000 is sort of a mouthful, most people refer to them as JP2 files.
JP2 is meant to succeed JPEG. It has the same basic purpose as JPEG - lossy compression of photographic images. The main difference is that JP2 uses wavelet compression instead of the DCT (Discrete Cosine Transform) compression found in JPEG.
The result is that where a heavily-compressed JPEG file exhibits chunky artifacts, JP2 artifacts are soft and blurry. Ultimately you can get an image with the same visual quality using less data.
JP2 also supports a lossless compression mode (sort of like PNG), alpha channel transparency, and 16-bit color among other things.
SuperPNG picks up the slack, supporting the majority of PNG features including 16-bit color, variable amounts of compression, embedded color space information, and other meta data.
SuperPNG is also faster than Adobe's plug-in and writes smaller files.
I think JPEG2000 is a good format to save large maps on web space.
Bye Jens