From f618466c25d43f3bae9e40920273bf77de1e1149 Mon Sep 17 00:00:00 2001 From: leochanj105 Date: Mon, 19 Oct 2020 23:09:30 -0400 Subject: initial sd-vbs initial sd-vbs add sd-vbs sd-vbs --- SD-VBS/benchmarks/sift/src/matlab/diffss.m | 72 ++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 SD-VBS/benchmarks/sift/src/matlab/diffss.m (limited to 'SD-VBS/benchmarks/sift/src/matlab/diffss.m') diff --git a/SD-VBS/benchmarks/sift/src/matlab/diffss.m b/SD-VBS/benchmarks/sift/src/matlab/diffss.m new file mode 100644 index 0000000..1e65390 --- /dev/null +++ b/SD-VBS/benchmarks/sift/src/matlab/diffss.m @@ -0,0 +1,72 @@ +function dss = diffss(ss) +% DIFFSS Difference of scale space +% DSS=DIFFSS(SS) returns a scale space DSS obtained by subtracting +% consecutive levels of the scale space SS. +% +% In SIFT, this function is used to compute the difference of +% Gaussian scale space from the Gaussian scale space of an image. +% +% See also GAUSSIANSS(), PDF:SIFT.USER.SS. + +% AUTORIGHTS +% Copyright (c) 2006 The Regents of the University of California. +% All Rights Reserved. +% +% Created by Andrea Vedaldi +% UCLA Vision Lab - Department of Computer Science +% +% Permission to use, copy, modify, and distribute this software and its +% documentation for educational, research and non-profit purposes, +% without fee, and without a written agreement is hereby granted, +% provided that the above copyright notice, this paragraph and the +% following three paragraphs appear in all copies. +% +% This software program and documentation are copyrighted by The Regents +% of the University of California. The software program and +% documentation are supplied "as is", without any accompanying services +% from The Regents. The Regents does not warrant that the operation of +% the program will be uninterrupted or error-free. The end-user +% understands that the program was developed for research purposes and +% is advised not to rely exclusively on the program for any reason. +% +% This software embodies a method for which the following patent has +% been issued: "Method and apparatus for identifying scale invariant +% features in an image and use of same for locating an object in an +% image," David G. Lowe, US Patent 6,711,293 (March 23, +% 2004). Provisional application filed March 8, 1999. Asignee: The +% University of British Columbia. +% +% IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY +% FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, +% INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND +% ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN +% ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. THE UNIVERSITY OF +% CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT +% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +% A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" +% BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE +% MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + +dss.smin = ss.smin ; +dss.smax = ss.smax-1 ; +dss.omin = ss.omin ; +dss.O = ss.O ; +dss.S = ss.S ; +dss.sigma0 = ss.sigma0 ; + +for o=1:dss.O + % Can be done at once, but it turns out to be faster + % this way + [M,N,S] = size(ss.octave{o}) ; + dss.octave{o} = zeros(M,N,S-1) ; + for s=1:S-1 + dss.octave{o}(:,:,s) = ... + ss.octave{o}(:,:,s+1) - ss.octave{o}(:,:,s) ; + end +end + +% for i=1:32 +% for j=1:32 +% fprintf(1, '%f\n', dss.octave{1}(i,j,1)); +% end +% end -- cgit v1.2.2