How I can mex funtion in matlab

Hye

I have daisy descriptor code. I want to calculate features from images by using this code. While runing I.m getting error of Mex function command.

I have installed related Pacakge But it is giving me error. I have search thorughout internet But not be able to figure out

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% %

% Written and (C) by %

% Engin Tola %

% %

% web : http://cvlab.epfl.ch/~tola/ %

% email : [e-mail] %

% %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

% This code is a matlab implementation of the algorithm presented in the

% paper titled 'A Fast Local Descriptor for Dense Matching' by Engin Tola,

% Vincent Lepetit and Pascal Fua published in the proceedings of the

% Computer Vision and Pattern Recognition 2008 Conference.

%

% Please give a reference to that paper if you use this code in any

% academic work.

%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

% Source code is available under the GNU General Public License. In short,

% if you distribute a software that uses DAISY, you have to distribute it

% under GPL with the source code. Another option is to contact us to

% purchase a commercial license.

%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

% See the usage.matlab document about the details on how to use this code

% and some warnings

%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

function [dzy] = compute_daisy(image, R, RQ, TQ, HQ, SI, LI, NT)

%%

if nargin == 5

SI = 1;

LI = 1;

NT = 1;

elseif nargin == 1

R = 15;

RQ = 3;

TQ = 8;

HQ = 8;

SI = 1;

LI = 1;

NT = 1;

end

[dzy] = init_daisy(image,R,RQ,TQ,HQ,SI,LI,NT);

o = 0; % which orientation to compute the descriptors

fprintf(1,'computing descriptors ');

tic;

dzy.descs = mex_compute_all_descriptors(dzy.H, dzy.params, dzy.ogrid(:,:,o+1), dzy.ostable, single(o) )';

time_dc=toc;

fprintf(1,'is done in %f sec\n',time_dc);