Posted by
Jarek Sacha on
Sep 15, 2005; 9:15pm
URL: http://imagej.273.s1.nabble.com/LZW-compressed-tiffs-tp3704864p3704865.html
Jon Harman wrote:
> In looking for lossless compression for my large image files, I
> started using LZW tiffs. (are there better formats?) I found that
> different programs produce very different output files using this and
> sometimes ImageJ would fail to read the output. For instance
> paintshop pro sometimes produces a file that can't be read. Photoshop
> seems much better. Irfanview produces files that sometimes can't be
> read, and additionally aren't much compressed. So this format seems
> to be a can of worms.
PNG format has good lossless compression. ImageJ can read it with no
problems (at least I never seen any), however, to write PNG you will
need a plugin like one available at:
http://ij-plugins.sourceforge.net/plugins/imageio/index.htmlThat plugin bundle also have plugins that can correctly read tiled ("out
of order") TIFF images. Current release version does not support some of
the newer PhotoShop LZW variants, and cannot write compressed images.
The version 2.0 (not yet released but available through CVS), can read
PhotoShop LZW, and will be able to write LZW compressed TIFF images. It
will also support lossless JPEG2000 that can compress better than LZW
TIFF or PNG. If you need more info on that or will like to help with new
plugins (implementing or testing), let me know.
Jarek