This is a simple tag and content-based image retrieval platform built atop Node.js. Express framework has been used for frontend.
XQuery based BaseX XML engine has been used for tag-based search. For CBIR, a 3D color histogram based technique and a Bag-of-Features descriptor model on SIFT features has been used. OpenCV library has been used.
By no means is this a flawless platform structure and does require some work. OpenCV code is fairly modularized and could be used independently for other projects. Suggestions are welcome.
CODE STRUCTURE
Server directory contains code for the upload interface which allows users to upload their images one-by-one with their corresponding tags (location, style, theme etc.). Can be started by using node app or nodemon app. It currently listens on localhost:8080.
Client directory contains code for the search interface which allows users to search on the basis of tags or perform an image-based search. Can be started by using node app or nodemon app. It currently listens on localhost:8080. You should also start the BaseX server from another terminal by typing basexserver.
Database directory contains the the uploaded images and their thumbnails (auto-generated), the XML file for storing image tags, the XML file for storing color histograms, the YAML file for SIFT based BoF dictionary/vocabulary and the final SIFT based BoF descriptors for every image in YAML format.
SIFTExtraction contains code for extracting SIFT features and generating BoF descriptors.
ColorExtraction contains code for generating color histograms and color-based matching.
DEPENDENCIES
OpenCV 2.4.9 or greater Note: OpenCV 3 is currently not supported.
Imagemagick Can be installed using apt-get install libmagick++-dev or something similar.
Python 2.x
BaseX XML Database
CMake
Build essentials(g++, make etc.) Can be installed using apt-get install build-essential or something similar.
NodeJS and npm
Python packages(xmltodict, numpy, argparse and glob) Some are already installed with Python. Others can be installed using pip install.
Node packages Needed in the Server and Client apps. Listed in package.json files.
For a more detailed description of above directories, go through README for the specific directory.