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A Host implementation of Bag of Visual Words Structure in C++
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README.md

Bag of Visual Words

Bag of Visual Words

This is an implementation of Bag-og-visual-Words method which is able to classify images based on their similariy. The similarity here defines based on 2D photometric featues (in particular we are using SIFT features with a dimension of 128 array). The implementation is menat to be simplistic and easily be used.

it uses gps positions and timestpams to sort out the images and evaluate the results. also an HTML interface is provided wihch gets updated based on the results of each execution. inbelow you can find dependencies and more information about using code.

Dependencies

  • c++11
  • cmake 2.8
  • opencv 2.4 + nonfree libraies
  • html

Install OpenCV and non-free libraries

sudo add-apt-repository --remove ppa:xqms/opencv-nonfree
sudo add-apt-repository --yes ppa:jeff250/opencv
sudo apt-get update
sudo apt-get install libopencv-dev
sudo apt-get install libopencv-nonfree-dev

How to compile the code

cd *desired directory*
git clone https://github.com/alirezaahmadi/Bag-of-Visual-Words.git
cd Bag-of-Visual-Words/
mkdir build
cd build
cmake ..
make 

Now you are ready to run the code:

How to run code

you have 3 different modes to run the code:

first navigate into /bin folder:

    cd ../bin/
  1. loading dataset and building feature space and saving them as binary files

     ./BoVW 1 *Dataset_path w.r.t to /bin folder*
    
  2. loading binary files and runing K-means to classify the features based on the similarity

     ./BoVW 2
    
  3. runing evaluation based on TFIDF and image histograms and finding 10 the most similar images to one test image wihch is given as input

     ./BoVW 3 *test image directory with .png type*
    

Viewing Results

By running third run command code will generate an HTML file which look like the image below showing searched test image and 10 most similar candidates in the dataset with their locations on the google maps and a measure of similarity in percentage.

NOTE result page is is stored in /html folder

Result HTML Page

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