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KCFcpp

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C++ Implementation of KCF Tracker

// repository documentation

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# C++ KCF Tracker
This package includes a C++ class with several tracking methods based on the Kernelized Correlation Filter (KCF) [1, 2].   
It also includes an executable to interface with the VOT benchmark.

[1] J. F. Henriques, R. Caseiro, P. Martins, J. Batista,   
"High-Speed Tracking with Kernelized Correlation Filters", TPAMI 2015.

[2] J. F. Henriques, R. Caseiro, P. Martins, J. Batista,   
"Exploiting the Circulant Structure of Tracking-by-detection with Kernels", ECCV 2012.

Authors: Joao Faro, Christian Bailer, Joao F. Henriques   
Contacts: joaopfaro@gmail.com, Christian.Bailer@dfki.de, henriques@isr.uc.pt   
Institute of Systems and Robotics - University of Coimbra / Department of Augmented Vision DFKI

### Algorithms (in this folder) ###

"KCFC++", command: ./KCF   
Description: KCF on HOG features, ported to C++ OpenCV. The original Matlab tracker placed 3rd in VOT 2014.

"KCFLabC++", command: ./KCF lab   
Description: KCF on HOG and Lab features, ported to C++ OpenCV. The Lab features are computed by quantizing CIE-Lab colors into 15 centroids, obtained from natural images by k-means.

The CSK tracker [2] is also implemented as a bonus, simply by using raw grayscale as features (the filter becomes single-channel).

### Compilation instructions ###
There are no external dependencies other than OpenCV 3.0.0. Tested on a freshly installed Ubuntu 14.04.

1) cmake CMakeLists.txt   
2) make

### Running instructions ###

The runtracker.cpp is prepared to be used with the VOT toolkit. The executable "KCF" should be called as:

./KCF [OPTION_1] [OPTION_2] [...]

Options available:

gray - Use raw gray level features as in [1].   
hog - Use HOG features as in [2].   
lab - Use Lab colorspace features. This option will also enable HOG features by default.   
singlescale - Performs single-scale detection, using a variable-size window.   
fixed_window - Keep the window size fixed when in single-scale mode (multi-scale always used a fixed window).   
show - Show the results in a window.

To include it in your project, without the VOT toolkit you just need to:
	
	// Create the KCFTracker object with one of the available options
	KCFTracker tracker(HOG, FIXEDWINDOW, MULTISCALE, LAB);

// Give the first frame and the position of the object to the tracker
	tracker.init( Rect(xMin, yMin, width, height), frame );

// Get the position of the object for the new frame
	result = tracker.update(frame);

KCFcpp

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