IJ Plugins: Image I/O
Image IO Plugin Bundle
Image I/O plugins add to ImageJ support for additional image file
formats and their variants. Most important additions include:
- Extended TIFF support
- Reading of compressed and tiled TIFF files
- Reading of TIFF images with 1 bit,
8 bit, 16 bit, 32 bit, and float pixel formats from compressed
and tiled files. Images are converted to closest
corresponding ImageProcessor representation (). Note that
related set of
converts all images to 8 bit images
(ByteProcessor) regardless of their actual pixel formats and
does not support tiled images.
- Saving as compressed
TIFF; supports Packbit, JPEG, and ZIP compression.
Saving with LZW compression is not supported for the usual
reason of the patent on the algorithm.
- Saving of binary images in 1 bit
compressed TIFF format. Compared to saving as
uncompressed 8bit images can get 1:100 or higher compression
- Correct reading of 16bit PNG images (without conversion to 8 bit)
- Saving in PNG format, includes support for compression.
- Saving in PNM format.
Image I/O plugins can read/write image calibration information from
TIFF files. Standard TIFF image calibration tags are supported
(X_RESOLUTION, Y_RESOLUTION, RESOLUTION_UNIT).
Additionally Image I/O can read images in BMP, FlashPiX, GIF, JPEG,
PNG, and PNM formats; and save images in BMP, and JPEG formats.
Image I/O makes use of Java Advance Imaging
(JAI) codecs released by SUN as uncommitted
source code for JAI 1.1.1 codecs . The plugin bundle is completely
self contained. All used codec classes are included in the bundle and there
is no need to install JAI itself to use the bundle.
Plugins and Locations
Image IO plugins are inserted into ImageJ menu in the following
File / Save As
- PNG ...: Shortcut for
saving images in PNG format using default compression
- PNM ...: Shortcut for
saving images in PNM format.
- Compressed TIFF ...:
Shortcut for saving images in TIFF format. Option dialog allows
selection of compression type. Binary images are auto detected
and saved in 1 bit format significantly increasing compression
Plugins / Image IO
- Open: shows standard
ImageJ open dialog and reads selected file in any of the file
formats supported by IMAGE I/O (BMP, FlashPiX, GIF, JPEG, PNG,
- Open with preview: shows
a custom open dialog with an image preview. File filter can be
used to limit files to a particular format. Image files are
filtered by checking a magic number in file header; file name
extension is ignored.
- Save as: shows custom
save dialog. Selected file filter determines format used to save
an image. Depending on the selected file format, the user can
select additional save options, for instance, image compression
- Remove obsolete JAI Image IO
plugins: Uninstalls obsolete JAI Image IO plugins
v.1.1 and earlier that can prevent Image I/O v.1.2 and later
from functioning correctly.
Help / About Plugins
- Image IO ...:
Information about Image IO plugin bundle similar to this
Screenshot:Open with preview ...
Image I/O plugin bundle requires ImageJ 1.31s and Java 1.4 or later.
It may work with 1.3. It was tested with ImageJ 1.31u and Java 1.4 and
1.5, on Linux and Windows.
- Download latest binary release of Image IO. Following the
link and look for ij-ImageIO_.jar with highest
- Copy ij-ImageIO_.jar to ImageJ plugins
directory. You can find location of ImageJ plugins directory by
Properties", look for value of tag "plugins
dir" near the bottom of the displayed
- Restart ImageJ to load newly installed plugins.
If you have installed Image IO plugin bundle version 1.1 or
earlier, it should be removed before Image IO v.1.2 and later can work
properly. This due to the new support for plugins packaged in JARs
introduces in ImageJ 1.31s: it is incompatible with JAR support of JAI
Image I/O 1.1 and earlier.
The obsolete JAI plugins can be removed using the
"Remove obsolete JAI Image IO plugins" plugin
included with Image I/O distribution v.1.2 and later.