Change the number of bins in Radon transform
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hieu Phan
le 9 Déc 2019
Modifié(e) : Walter Roberson
le 9 Déc 2019
Dear experts,
Is there any way to change the defaut munber of bins in matlab built in Radon transform? I want to perform a Radon transform on an image with a specific number of bin (stand for the munber of detectors), and a specific bin width.
thank you.
0 commentaires
Réponse acceptée
Walter Roberson
le 9 Déc 2019
% Grandfathered syntax
% R = RADON(I,THETA,N) returns a Radon transform with the
% projection computed at N points. R has N rows. If you do not
% specify N, the number of points the projection is computed at
% is:
%
% 2*ceil(norm(size(I)-floor((size(I)-1)/2)-1))+3
%
% This number is sufficient to compute the projection at unit
% intervals, even along the diagonal.
4 commentaires
Walter Roberson
le 9 Déc 2019
Modifié(e) : Walter Roberson
le 9 Déc 2019
I do not know.
When you use a fixed bin size, then you are not using a constant angle: you are using a larger angle when you are closer to the origin and a smaller angle further from the origin. That changes the mathematics of the transform, and the usual calculations do not apply.
Plus de réponses (0)
Voir également
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!