divine.m

function q = divine(im)
% DIIVINE Software release.
% 
% 
% ========================================================================
% 
% -----------COPYRIGHT NOTICE STARTS WITH THIS LINE------------
% Copyright (c) 2010 The University of Texas at Austin
% All rights reserved.
% 
% Permission is hereby granted, without written agreement and without license or royalty fees, to use, copy, 
% modify, and distribute this code (the source files) and its documentation for
% any purpose, provided that the copyright notice in its entirety appear in all copies of this code, and the 
% original source of this code, Laboratory for Image and Video Engineering (LIVE, http://live.ece.utexas.edu)
% and Center for Perceptual Systems (CPS, http://www.cps.utexas.edu) at the University of Texas at Austin (UT Austin, 
% http://www.utexas.edu), is acknowledged in any publication that reports research using this code. The research
% is to be cited in the bibliography as:
% 
% 1. A. K. Moorthy and A. C. Bovik, "Blind Image Quality Assessment: From Natural
% Scene Statistics to Perceptual Quality", IEEE Transactions on Image Processing, to appear (2011).
% 
% 2. A. K. Moorthy and A. C. Bovik, "DIVINE Software Release", 
% URL: http://live.ece.utexas.edu/research/quality/DIIVINE_release.zip, 2010
% 
% IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT AUSTIN BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, 
% OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS DATABASE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF TEXAS
% AT AUSTIN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
% 
% THE UNIVERSITY OF TEXAS AT AUSTIN SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
% WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE DATABASE PROVIDED HEREUNDER IS ON AN "AS IS" BASIS,
% AND THE UNIVERSITY OF TEXAS AT AUSTIN HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
% 
% -----------COPYRIGHT NOTICE ENDS WITH THIS LINE------------%
% 
% Author  : Anush Krishna Moorthy
% Version : 1.1
% 
% The authors are with the Laboratory for Image and Video Engineering
% (LIVE), Department of Electrical and Computer Engineering, The
% University of Texas at Austin, Austin, TX.
% 
% Kindly report any suggestions or corrections to anushmoorthy@gmail.com
% 
% ========================================================================
% 
% This is a demonstration of the Distortion Identification based image Verity and INtegrity Evaluation (DIVINE) index.
% It is an implementation of the BIQI in the reference.
% The algorithm is described in:
% A. K. Moorthy and A. C. Bovik, "Blind Image Quality Assessment: From Natural
% Scene Statistics to Perceptual Quality",  IEEE Transactions on Image Processing, to appear (2011).
% 
% You can change this program as you like and use it anywhere, but please
% refer to its original source (cite our paper and our web page at
% http://live.ece.utexas.edu/research/quality/DIIVINE_release.zip).
% 
% Input : A test 8bits/pixel grayscale image loaded in a 2-D array
% Output: A quality score of the image. The score typically has a value
%        between 0 and 100 (0 represents the best quality, 100 the worst).
% 
% Usage:
% 
% 1. Load the image, for example
% 
%   image = rgb2gray(imread('testimage.jpg')); 
% 
% 2. Call this function to calculate the quality score:
% 
%    quality = divine(image)
% 
% Dependencies: 
% Steerable Pyramid Toolbox, Download from: http://www.cns.nyu.edu/~eero/steerpyr/
% LibSVM package for MATLAB, Download from: http://www.csie.ntu.edu.tw/~cjlin/libsvm/
% You may need the MATLAB Image Processing Toolbox
% 
% Dependencies--
% 
% MATLAB files:  ssim_index_new.m, norm_sender_normalized.m, find_spatial_hist_fast.m, divine_overall_quality.m
%               divine_feature_extract.m,  map_matrix_to_closest_vec.m (provided with release)
% 
% Data files: data_live_trained.mat (provided with release)
% 
% This code has been tested on Windows and Mac OSX (Snow Leopard)
% 
% ========================================================================% 
% Note on training: 
% This release version of BIQI was trained on the entire LIVE database.
% 
% 

f = divine_feature_extract(im);
q = divine_overall_quality(f);