资源简介
This is a MATLAB/C implementation of the SIFT detector and descriptor

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
----------- --------- ---------- ----- ----
文件 148 2010-01-28 20:09 sift-0.9.19-Oxford\sift\.gitignore
文件 72310 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\box.pgm
文件 233055 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\box.sift
文件 10060 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\circle.pgm
文件 1362 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\circle.sift
文件 464954 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\img3.jpg
文件 467808 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\img5.jpg
文件 275111 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\landscape-a.jpg
文件 304723 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\landscape-b.jpg
文件 11101 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\nest.png
文件 17462 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\nest2.bmp
文件 337980 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\vessel-1.pgm
文件 337980 2010-01-28 20:09 sift-0.9.19-Oxford\sift\data\vessel-2.pgm
文件 2792 2010-01-28 20:09 sift-0.9.19-Oxford\sift\diffss.m
文件 246 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\bibliography.bib
文件 2552 2010-01-28 20:10 sift-0.9.19-Oxford\sift\doc\default.css
文件 550 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\figures\sift-desc
文件 475918 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\figures\sift-desc
文件 3275 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\figures\sift-desc
文件 8 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\figures\sift-desc
文件 13430 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\figures\sift-desc
文件 443880 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\figures\sift-desc
文件 3275 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\figures\sift-desc
文件 13 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\figures\sift-desc
文件 48557 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\figures\warmread.sty
文件 28411 2010-01-28 20:10 sift-0.9.19-Oxford\sift\doc\index.html
文件 239 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\sift.bbl
文件 593889 2010-01-28 20:10 sift-0.9.19-Oxford\sift\doc\sift.pdf
文件 22459 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\sift.tex
文件 6174 2010-01-28 20:09 sift-0.9.19-Oxford\sift\doc\visionlab.sty
............此处省略78个文件信息
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