summaryrefslogtreecommitdiffstats
path: root/src/ml/dlib/python_examples/svm_binary_classifier.py
diff options
context:
space:
mode:
Diffstat (limited to 'src/ml/dlib/python_examples/svm_binary_classifier.py')
-rwxr-xr-xsrc/ml/dlib/python_examples/svm_binary_classifier.py68
1 files changed, 68 insertions, 0 deletions
diff --git a/src/ml/dlib/python_examples/svm_binary_classifier.py b/src/ml/dlib/python_examples/svm_binary_classifier.py
new file mode 100755
index 000000000..d114c815a
--- /dev/null
+++ b/src/ml/dlib/python_examples/svm_binary_classifier.py
@@ -0,0 +1,68 @@
+#!/usr/bin/python
+# The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
+#
+#
+# This is an example illustrating the use of a binary SVM classifier tool from
+# the dlib C++ Library. In this example, we will create a simple test dataset
+# and show how to learn a classifier from it.
+#
+#
+# COMPILING/INSTALLING THE DLIB PYTHON INTERFACE
+# You can install dlib using the command:
+# pip install dlib
+#
+# Alternatively, if you want to compile dlib yourself then go into the dlib
+# root folder and run:
+# python setup.py install
+# or
+# python setup.py install --yes USE_AVX_INSTRUCTIONS
+# if you have a CPU that supports AVX instructions, since this makes some
+# things run faster.
+#
+# Compiling dlib should work on any operating system so long as you have
+# CMake installed. On Ubuntu, this can be done easily by running the
+# command:
+# sudo apt-get install cmake
+#
+
+import dlib
+try:
+ import cPickle as pickle
+except ImportError:
+ import pickle
+
+x = dlib.vectors()
+y = dlib.array()
+
+# Make a training dataset. Here we have just two training examples. Normally
+# you would use a much larger training dataset, but for the purpose of example
+# this is plenty. For binary classification, the y labels should all be either +1 or -1.
+x.append(dlib.vector([1, 2, 3, -1, -2, -3]))
+y.append(+1)
+
+x.append(dlib.vector([-1, -2, -3, 1, 2, 3]))
+y.append(-1)
+
+
+# Now make a training object. This object is responsible for turning a
+# training dataset into a prediction model. This one here is a SVM trainer
+# that uses a linear kernel. If you wanted to use a RBF kernel or histogram
+# intersection kernel you could change it to one of these lines:
+# svm = dlib.svm_c_trainer_histogram_intersection()
+# svm = dlib.svm_c_trainer_radial_basis()
+svm = dlib.svm_c_trainer_linear()
+svm.be_verbose()
+svm.set_c(10)
+
+# Now train the model. The return value is the trained model capable of making predictions.
+classifier = svm.train(x, y)
+
+# Now run the model on our data and look at the results.
+print("prediction for first sample: {}".format(classifier(x[0])))
+print("prediction for second sample: {}".format(classifier(x[1])))
+
+
+# classifier models can also be pickled in the same was as any other python object.
+with open('saved_model.pickle', 'wb') as handle:
+ pickle.dump(classifier, handle, 2)
+