Matlab (GUI) implementation for Bag of Visual words.

This implementation is based on Matlab functions and Vlfeat lib.
The number of visual words=200, to change it:
from line 87 in bovw_sift.m
from line 76 in bovw_surf.m
Download the VLFeat binary package (version 0.9.20) from the following link:
http://www.vlfeat.org/download.html
Extract vlfeat-0.9.20-bin in the root of the BoVW directory.

Add the following line in vlfeat-0.9.20-bin\vlfeat-0.9.20\toolbox\vl_setup.m:
addpath(fullfile(root,'apps','recognition'));

1- Run BoVW.m
2- Choose the number of classes
3- Browse image folders (folder for each class)
4- Choose descriptor (SIFT or SURF)
5- Train (5-fold validation)
6- Test using new images