how to compute Radon transform

Question

Elysi Cochin 2014-2-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/115800-how-to-compute-radon-transform

回答： Matt J 2014-2-12

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....

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Answer 1

Matt J 2014-2-12

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/115800-how-to-compute-radon-transform#answer_124074

在 MATLAB Online 中打开

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);