资源简介
matlab 实现的 sift 变换 的代码,包含整个过程的详细步骤。
代码片段和文件信息
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 6711293 (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
[MNS] = size(ss.octave{o}) ;
dss.octave{o} = zeros(MNS-1) ;
for s=1:S-1
dss.octave{o}(::s) = ...
ss.octave{o}(::s+1) - ss.octave{o}(::s) ;
end
end
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
目录 0 2006-08-04 10:29 data\
文件 464954 2006-04-05 04:45 data\img3.jpg
文件 1420810 2006-04-05 04:45 data\img3.sift
文件 467808 2006-04-05 04:45 data\img5.jpg
文件 1585635 2006-04-05 04:45 data\img5.sift
文件 275111 2006-05-01 19:51 data\landscape-a.jpg
文件 304723 2006-05-01 19:51 data\landscape-b.jpg
文件 7620 2006-04-05 04:45 data\test.png
文件 34162 2006-04-05 04:45 data\test.sift
文件 2797 2006-05-12 21:43 diffss.m
目录 0 2006-08-04 12:59 doc\
文件 246 2006-04-11 07:37 doc\bibliography.bib
目录 0 2006-04-27 23:03 doc\figures\
文件 550 2006-04-27 23:02 doc\figures\sift-desc
文件 475918 2006-04-27 23:02 doc\figures\sift-desc
文件 3275 2006-04-27 23:00 doc\figures\sift-desc
文件 8 2006-04-27 23:03 doc\figures\sift-desc
文件 13430 2006-04-27 23:03 doc\figures\sift-desc
文件 443880 2006-04-27 23:03 doc\figures\sift-desc
文件 3275 2006-04-27 23:03 doc\figures\sift-desc
文件 13 2006-04-27 23:03 doc\figures\sift-desc
文件 48557 2001-07-05 02:24 doc\figures\warmread.sty
文件 21807 2006-05-13 07:16 doc\sift.tex
文件 6174 2006-04-11 07:39 doc\visionlab.sty
文件 7920 2006-05-12 21:44 gaussianss.m
文件 2359 2006-05-12 21:45 imreadbw.m
文件 2994 2006-05-01 22:36 imsmooth.c
文件 1990 2006-04-05 08:42 LICENSE
文件 2117 2006-08-04 10:31 Makefile
文件 2178 2006-05-01 22:36 mexutils.c
文件 4360 2006-05-18 17:36 plotmatches.m
............此处省略24个文件信息
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