文件列表:

softwarerelease (0, 2005-01-30)
softwarerelease\hist2d.c (5055, 2005-01-30)
softwarerelease\hist2d.dll (24576, 2003-05-20)
softwarerelease\hist2d.m_rename (2134, 2005-01-30)
softwarerelease\image_wtransform.m (3494, 2004-09-21)
softwarerelease\jointhist.m (3809, 2005-01-30)
softwarerelease\jp2knr_quality.m (5084, 2005-01-30)
softwarerelease\train_all.mat (560, 2004-06-11)

% -----------COPYRIGHT NOTICE STARTS WITH THIS LINE------------ % Copyright (c) 2003 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: % % H. R. Sheikh, A. C. Bovik and L. Cormack, "No-Reference Quality % Assessment using Natural Scene Statistics: JPEG2000"., IEEE Transactions on Image Processing, (to appear). % % 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------------ This software release consists of an implementation of the algorithm described in the paper: H. R. Sheikh, A. C. Bovik and L. Cormack, "No-Reference Quality Assessment using Natural Scene Statistics: JPEG2000"., IEEE Transactions on Image Processing, (to appear). It consists of the following files: readme.txt: this file jp2knr_quality.m: main function, call this to evaluate image quality jointhist.m, image_wtransform.m, train_all.mat, hist2d.dll: support files used by the algorithm. hist2d.c: source MEX file for hist2d.dll hist2d.m_rename: a Matlab replacement for the hist2d.dll. rename it to hist2d.m if the dll file does not work on your platform. The M file is quite slower than the dll, and also gives slightly different results (possibly due to different bin-edge calculation) than the dll. The results reported in the paper are using the dll file. Results may be different (better or worse) with the M file. Usage: jp2knr_qualiy(greyscale_image) will return a number. The higher the number, the higher the quality. Please read the paper for more details on interpretation of the results. Note on training: The file train_all.mat was generated using all JPEG2000 compressed images in the LIVE image quality database (http://live.ece.utexas.edu/research/quality)

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