What are the inputs to the ridgelet functions??

function rt = ridgelet( x, L, md ) 
%x=imread('C:\Users\Public\Pictures\Sample Pictures\test.jpg');
%L=10;
%md=0; 
%pt1=11;
%pt2=12;
if ~exist( 'md', 'var' ) md = 0; end
[l1, l2] = size( x ); 
if rem( l1,2 ) == 0 && rem( l2,2 ) == 0
    pt1 = l1 + 1; 
    pt2 = l2 + 1; 
end
yr = fft2( x, pt1, pt2 ); 
yp = cart_2_rectopolar( yr );
l = size( yp, 1 ); 
if md == 0 
    rt = fft_iso_dwt( yp(1,:), L, md );
elseif md == 1
    rt = cell(l,1);
    rt{1} = fft_iso_dwt( yp(1,:), L, md );
end 
for jj = 2:l
    if md == 0
        rt(jj,:) = fft_iso_dwt( yp(jj,:), L, md ); 
    elseif md == 1
        rt{jj} = fft_iso_dwt( yp(jj,:), L, md );
    end
    imshow(rt); 
end

Answer 1

[Abhipsa]

Hello @Karthik Nagarajan,

The inputs for the "ridgelet" function can be deduced as follows:

• X = Input image of square size
• L = Nunber of scales in ridgelet function
• md = if 1, o/p is a cell ; if 0, o/p is a vector

You can refer to the below MathWorks File Exchange link for more information about "ridgelet" function:

• https://www.mathworks.com/matlabcentral/fileexchange/31559-ridgelet-and-curvelet-first-generation-toolbox

After navigating to the above webpage, please navigate to the Functions tab, from the "curvelet_first_generation/", select the "ridgelet" function, then the relevant source code with appear.

This source code is very well-document along with relevant comments, which captures the information on the expected inputs and outputs of the function.

I hope this helps you.