how to compute Radon transform

I wanted to "compute Radon transform with a resolution of 30 with six bins each, creating a compact feature vector of dimension 36"

Please can someone help me how to do it... i tried the radon function in matlab.... but i get an output getter than dimension 36...

 R = radon(ROI,30);

please can someone correct it for me how to do it.... please do reply....

Answer 1

[Matt J]

You can downsample the result with the following

function M=downsampn(M,bindims)
%DOWNSAMPN - simple tool for downsampling n-dimensional nonsparse arrays
%
%  M=downsampn(M,bindims)
%
%in:
%
% M: an array
% bindims: a vector of integer binning dimensions
%
%out:
%
% M: the downsized array

nn=length(bindims);

[sz{1:nn}]=size(M); %M is the original array
sz=[sz{:}];

newdims=sz./bindims;

args=num2cell([bindims;newdims]);

M=reshape(M,args{:});

for ii=1:nn

   M=mean(M,2*ii-1);

end

M=reshape(M,newdims);