{ "info": { "author": "Olivier Grisel", "author_email": "olivier.grisel@ensta.org", "bugtrack_url": null, "classifiers": [], "description": "Python Wrapper for the LEAR image descriptor implementation\n===========================================================\n\n:author: \n\nLibrary to compute GIST global image descriptors to be used to compare pictures\nbased on their content (to be used global scene recognition and categorization).\n\nThe GIST image descriptor theoritical definition can be found on A. Torralba's\npage: http://people.csail.mit.edu/torralba/code/spatialenvelope/\n\nThe source code of the C implementation is included in the ``lear_gist``\nsubfolder. See http://lear.inrialpes.fr/software for the original project\ninformation.\n\npyleargist is licensed under the GPL, the same license as the original C\nproject.\n\n\nInstall\n-------\n\nInstall libfftw3 with development headers (http://www.fftw.org), python dev\nheaders, gcc, the Python Imaging Library (PIL) and numpy.\n\nBuild locally for testing::\n\n % python setup.py buid_ext -i\n % export PYTHONPATH=`pwd`/src\n\nBuild and install system wide::\n\n % python setup.py build\n % sudo python setup.py install\n\n\nUsage\n-----\n\nHere is a sample session in a python shell once the library is installed::\n\n >>> from PIL import Image\n >>> import leargist\n\n >>> im = Image.open('lear_gist/ar.ppm')\n >>> descriptors = leargist.color_gist(im)\n\n >>> descriptors.shape\n (960,)\n\n >>> descriptors.dtype\n dtype('float32')\n\n >>> descriptors[:4]\n array([ 0.05786307, 0.19255637, 0.09331483, 0.06622448], dtype=float32)\n\n\nThe GIST descriptors (fixed size, 960 by default) can then be used as an\neuclidian space to cluster images based on their content.\n\nThis dimension can then be reduced to a 32 or 64 bits semantic hash by using\nLocality Sensitive Hashing, Spectral Hashing or Stacked Denoising Autoencoders.\n\nA sample implementation of picture semantic hashing with SDAs is showcased in\nthe libsgd library: http://code.oliviergrisel.name/libsgd\n\nChanges\n-------\n\n- 1.1.0: 2010/03/25 - fix segmentation fault bug, thx to S. 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