Merge pull request #16 from dmpelt/python-interface

Add Python interface

1 files changed, 77 insertions, 0 deletions

diff --git a/samples/python/s002_data2d.py b/samples/python/s002_data2d.py
new file mode 100644
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+++ b/samples/python/s002_data2d.py
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+#-----------------------------------------------------------------------
+#Copyright 2013 Centrum Wiskunde & Informatica, Amsterdam
+#
+#Author: Daniel M. Pelt
+#Contact: D.M.Pelt@cwi.nl
+#Website: http://dmpelt.github.io/pyastratoolbox/
+#
+#
+#This file is part of the Python interface to the
+#All Scale Tomographic Reconstruction Antwerp Toolbox ("ASTRA Toolbox").
+#
+#The Python interface to the ASTRA Toolbox is free software: you can redistribute it and/or modify
+#it under the terms of the GNU General Public License as published by
+#the Free Software Foundation, either version 3 of the License, or
+#(at your option) any later version.
+#
+#The Python interface to the ASTRA Toolbox is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+#GNU General Public License for more details.
+#
+#You should have received a copy of the GNU General Public License
+#along with the Python interface to the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
+#
+#-----------------------------------------------------------------------
+
+import astra
+import numpy as np
+
+vol_geom = astra.create_vol_geom(256, 256)
+
+proj_geom = astra.create_proj_geom('parallel', 1.0, 384, np.linspace(0,np.pi,180,False))
+
+
+# Create volumes
+
+# initialized to zero
+v0 = astra.data2d.create('-vol', vol_geom)
+
+# initialized to 3.0
+v1 = astra.data2d.create('-vol', vol_geom, 3.0)
+
+# initialized to a matrix. A may be a single, double or logical (0/1) array.
+import scipy.io
+A = scipy.io.loadmat('phantom.mat')['phantom256']
+v2 = astra.data2d.create('-vol', vol_geom, A)
+
+
+# Projection data
+s0 = astra.data2d.create('-sino', proj_geom)
+# Initialization to a scalar or a matrix also works, exactly as with a volume.
+
+
+# Update data
+
+# set to zero
+astra.data2d.store(v0, 0)
+
+# set to a matrix
+astra.data2d.store(v2, A)
+
+
+
+# Retrieve data
+
+R = astra.data2d.get(v2)
+import pylab
+pylab.gray()
+pylab.imshow(R)
+pylab.show()
+
+
+# Free memory
+astra.data2d.delete(v0)
+astra.data2d.delete(v1)
+astra.data2d.delete(v2)
+astra.data2d.delete(s0)