HOG features visualisation with OpenCV, HOGDescriptor in C++

c++, feature-detection, opencv

Solution

HOGgles¹ is a method developed for HOG visualization, published on ICCV 2013. Here is an example:

This visualization tool may be more useful than plotting the gradient vectors of HOG because one can see better why HOG failed for a given sample.

More information can be found here: http://web.mit.edu/vondrick/ihog/

¹C. Vondrick, A. Khosla, T. Malisiewicz, A. Torralba. "HOGgles: Visualizing Object Detection Features" International Conference on Computer Vision (ICCV), Sydney, Australia, December 2013.

Problem

I use the HOGDescriptor of the OpenCV C++ Lib to compute the feature vectors of an images. I would like to visualize the features in the source image. Can anyone help me?

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