Graeme,
Unfortunately, my intent is to write out the image as a proper CBF. Your email is exactly correct, as I was at first quite happy to find how simple it was to add the images together, but then disappointed as I have struggled writing out a proper CBF in one step.
I, of course, can write the CBF out and then hack the header, but this wastes a lot of time, having to effectively write a CBF twice. I was able to write a header and CBF data separately and then concatenate them, but the header for the CBF data file needs edited…
Frank
On Dec 3, 2012, at 5:01 AM,
Hi Frank,
It would be easy to write one, as pycbf is included in there as is some code to unpack the byte-offset compression quickly in iotbx.detectors -
from iotbx.detectors import ImageFactory
image = ImageFactory(filename) image.read() image.get_raw_data()
You would however need to create and pack the data to a new CBF file, which IIRC requires some new additions to the pycbf bindings - I asked Herbert B about this a while back and he needed to make some patches as it was not generally possible. That said, what I was after was creating a full cbf not e.g. miniCBF.
Adding the new version to a live version of cctbx/python is easy enough.
I take it as a given that this is for visualizing - you're not too worried about the image headers? Otherwise this will be somewhat more tricky.
Email from Herbert B follows. It went to the imgCIF mailing list so is public already :o)
Best wishes,
Graeme
-------------
Dear Graeme,
I have made a new example that uses setters and writes a byte-offset compressed image. Testing revealed some bugs in the wrapper for some of the setters, so I have also updated the release kit. The whole thing is available on the CBFlib_bleeding_edge svn on sourceforge as well as a release kit
http://downloads.sf.net/cbflib/CBFlib-0.9.2.6.tar.gz
Please give it a try and take a look at pycbf/pycbf_test4.py for an example of writing a byte-offset CBF. Let me know if it does what you need. If not, tell me what is missing or wrong and I'll be happy to fix things and add more pycbf examples to the kit.
Regards, Herbert
P.S. This was a very useful question because it relate to testing the HDF5 changes.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Frank Murphy Sent: 01 December 2012 14:22 To: cctbx mailing list Subject: [cctbxbb] CBF compositing
Hello,
Does anyone have a CCTBX-based method for compositing multiple CBFs to a single image a la merge2cbf?
Thanks in advance, Frank Murphy
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