How to calculate Local Binary Pattern Histograms with OpenCV?

Question

I have already seen that OpenCV provides a classifier based on LBP histograms:

But I want to have access to the LBP histogram itself. For instance:

histogram = calculate_LBP_Histogram( image )

Is there any function that performs this in OpenCV?

lightalchemist · Accepted Answer · 2012-12-15 06:57:32Z

21

You can get the C++ code for computing LBP using OpenCV's Mat data structure here:

http://www.bytefish.de/blog/local_binary_patterns

You should be able to find the Python version as well on the same site.

The code is written by Philipp Wagner, who I believe contributed the face recognition code you mentioned to OpenCV, so it should be the same thing.

The LBP code is found in the file: OpenCV-2.4.2/modules/contrib/src/facerec.cpp as a static function. Unfortunately, it does not appear to be exposed for public use (at least for OpenCV 2.4.2).

edited Dec 15, 2012 at 6:57

answered Dec 6, 2012 at 7:24

lightalchemist

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3 Comments

eran Over a year ago

Thanks, Do you know what additional changes need to be done (besides removing the static from the LBP functions, and building the project) to expose this in the Python version of OpenCV?

lightalchemist Over a year ago

Hi @eran. If you wish to have LBP available using Python, consider the scikit-image library: scikit-image.org/docs/dev/auto_examples/… But otherwise to make the LBP available for Python you need to do additional work to write the Python bindings for that function.

eran Over a year ago

Thanks! I managed to do it, see stackoverflow.com/questions/18426765/…

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