Error code using iradon

20 views (last 30 days)
Ryan
Ryan on 21 Jun 2021
Commented: Ryan on 21 Jun 2021
I keep getting the error message in my script below when using iradon. How would I resolve this error?
I0 = 10^4;
noAngles = 590;
step = 180/noAngles;
theta = step:step:180;
Y = radon(whatisit,theta)/255;
NoisyRMphantom_Proj = -log(NoisyRMphantom_Trans./I0);
FBPnoisyRM = iradon(NoisyRMphantom_Proj,theta,'linear','Ram-Lak',1,751);
%Error using iradon>parse_inputs (line 346)
%THETA does not match the number of projections.
%Error in iradon (line 119)
%[p,theta,filter,d,interp,N] = parse_inputs(args{:});
  2 Comments
Walter Roberson
Walter Roberson on 21 Jun 2021
What is size(NoisyRMphantom_Trans) ?
Ryan
Ryan on 21 Jun 2021
1017x360

Sign in to comment.

Accepted Answer

Walter Roberson
Walter Roberson on 21 Jun 2021
  • If theta is a vector, then specify R as a 2-D matrix in which each column is the Radon transform for one of the angles in theta.
Your theta is a vector, so your input R (first parameter) should be an array that has the same number of columns as theta has entries.
Your theta has 590 entries (noAngles), so your R should have 590 columns. But instead it has 360 columns.
  1 Comment
Ryan
Ryan on 21 Jun 2021
Hi Walter, I've changed R colums to match. iradon is working now. Thanks so much!

Sign in to comment.

More Answers (0)

Products


Release

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!