60 lines
2.3 KiB
ReStructuredText
60 lines
2.3 KiB
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Glymur: a Python interface for JPEG 2000
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**Glymur** is an interface to the OpenJPEG library
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which allows one to read and write JPEG 2000 files from within Python.
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Glymur supports both reading and writing of JPEG 2000 images. Writing
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JPEG 2000 images is currently limited to images that can fit in memory,
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however.
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Of particular focus is retrieval of metadata. Reading Exif UUIDs is supported,
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as is reading XMP UUIDs as the XMP data packet is just XML. There is
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some very limited support for reading JPX metadata. For instance,
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**asoc** and **labl** boxes are recognized, so GMLJP2 metadata can
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be retrieved from such JPX files.
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Glymur works on Python 2.6, 2.7, and 3.3.
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OpenJPEG Installation
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=====================
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Glymur will read JPEG 2000 images with versions 1.3, 1.4, 1.5, 2.0,
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and the trunk/development version of OpenJPEG. Writing images is
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only supported with the 2.0 series, however, and the trunk/development
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version is strongly recommended. For more information about OpenJPEG,
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please consult http://www.openjpeg.org.
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If you use MacPorts on the mac or if you have a sufficiently recent
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version of Linux, your package manager should already provide you
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with a version of OpenJPEG 1.X with which glymur can already use
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for read-only purposes. If your platform is windows, I suggest
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using the windows installers provided to you by the OpenJPEG
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folks at https://code.google.com/p/openjpeg/downloads/list .
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Glymur Installation
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===================
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You can retrieve the source for Glymur from either of
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* https://pypi.python.org/pypi/Glymur/ (stable releases)
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* http://github.com/quintusdias/glymur (bleeding edge)
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but you should also be able to install Glymur via pip ::
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$ pip install glymur
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This will install the **jp2dump** script that can be used from the unix command
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line, so you should adjust your **$PATH**
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to take advantage of it. For example, if you install with pip's
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`--user` option on linux ::
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$ export PYTHONPATH=$HOME/.local/lib/python3.3/site-packages
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$ export PATH=$HOME/.local/bin:$PATH
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You can run the tests from within python as follows::
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>>> import glymur
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>>> glymur.runtests()
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Many tests are currently skipped; in fact most of them are skipped if you
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are relying on OpenJPEG 1.X. The important thing, though, is whether or
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not any tests fail.
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