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Highlights from
OpenSURF (including Image Warp)

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from OpenSURF (including Image Warp) by Dirk-Jan Kroon
SURF (Speeded Up Robust Features) image feature point detection / matching, as in SIFT

an=FastHessian_getResponse(a,row, column,b) % This function FastHessian_getResponse will .. 
function an=FastHessian_getResponse(a,row, column,b)
% This function FastHessian_getResponse will ..
%
% [an] = FastHessian_getResponse( a,row,column,b )
%  
%  inputs,
%    a : 
%    row : 
%    column : 
%    b : 
%  
%  outputs,
%    an : 
%  
% Function is written by D.Kroon University of Twente ()
if(nargin<4)
    scale=1;
else
    scale=fix(a.width/b.width);
end

an=a.responses(fix(scale*row) * a.width + fix(scale*column)+1);

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