explaination about code line detection

hello... can everyone explain to me about codes below... thanks alot

 theta = -90:89;

 [R,xp] = radon(binaryImage,theta);

 [R1,r_max] = max(R); 

 theta_max = 90;

 while(theta_max > 50 || theta_max<-50)

    [R2,theta_max] = max(R1); 

    R1(theta_max) = 0; 

    theta_max = theta_max - 91;

[Jan]

What do you want to be explained? Do you understand how to create a vector using "a:b"? Or are you asking about the function "radon"? Please be more specific to allow for an efficient answer.

[mohd]

i want to know about the function radon in my code.

Answer 1

[Thomas]

doc radon

Radon

Radon transform Syntax

R = radon(I, theta) [R,xp] = radon(...)

Description

R = radon(I, theta) returns the Radon transform R of the intensity image I for the angle theta degrees.

The Radon transform is the projection of the image intensity along a radial line oriented at a specific angle. If theta is a scalar, R is a column vector containing the Radon transform for theta degrees. If theta is a vector, R is a matrix in which each column is the Radon transform for one of the angles in theta. If you omit theta, it defaults to 0:179.

[R,xp] = radon(...) returns a vector xp containing the radial coordinates corresponding to each row of R.

The radial coordinates returned in xp are the values along the x'-axis, which is oriented at theta degrees counterclockwise from the x-axis. The origin of both axes is the center pixel of the image, which is defined as floor((size(I)+1)/2)

For example, in a 20-by-30 image, the center pixel is (10,15