Name

radon — Radon transform

Calling Sequence

R = radon(im,theta)

Parameters

im
2D image array
theta
vector representing the angles, in degrees. Defaults to 0:179. If it is a scalar, then a column vector with the corresponding projection is returned.

Parameters

R
matrix in which each column contains the Radon transform for an angle.

Description

The Radon transform is the projection of the image intensity along a radial line oriented at a specific angle

Examples

   im = zeros(100,100);
   im(25:75,25:75) = 1;
   r=radon(im);
   imshow(r,[])

   im2 = iradon(r);
   xbasc()
   imshow(im2,[])

Authors

Leandro Farias Estrozi <estrozi (AT) vms DOT cnrs-gif DOT fr>
Ricardo Fabbri <ricardofabbri (AT) users DOT sf DOT net>

Bibliography

"The Radon Transform: Theory and Implementation", Peter Toft, PhD Thesis, Technical University of Denmark, 1996: http://pto.linux.dk/PhD/

Availability

The latest version of the Scilab Image Processing toolbox can be found at

http://siptoolbox.sourceforge.net

See Also

iradon , hough