Imlemented by Abinash Singh During FOSSEE Semester Long Fellowship 2024

1 files changed, 30 insertions, 28 deletions

diff --git a/macros/idct2.sci b/macros/idct2.sci
index c48980a..890927f 100644
--- a/macros/idct2.sci
+++ b/macros/idct2.sci
@@ -1,29 +1,31 @@
-function y = idct2(x,varargin)
-//This function computes the inverse 2-D discrete cosine transform of input matrix.
-//Calling Sequence
-//Y = idct2(X)
-//Y = idct2(X, M, N)
-//Y = idct2(X, [M, N])
-//Parameters
-//X: Matrix or integer
-//M, N: If specified Matrix X is padded with M rows and N columns.
-//Description
-// This function computes the inverse 2-D discrete cosine transform of matrix X. If M and N are specified, the input is either padded or truncated to have M rows and N columns.
-//Examples
-//idct2(3, 4, 6)
-//ans = 
-//     2.811261   0.612372  -0.525856   0.250601   0.612372  -0.086516
-funcprot(0);
-rhs=argn(2);
-if (rhs<1 | rhs>3) then
-    error("Wrong number of input arguments.");
-end
-select(rhs)
-case 1 then
-    y=callOctave("idct2",x)
-case 2 then 
-    y=callOctave("idct2",x,varargin(1))
-case 3 then
-    y=callOctave("idct2",x,varargin(1),varargin(2))
-end
+/*Description
+    This function computes the inverse 2-D discrete cosine transform of matrix X. If M and N are specified, the input is either padded or truncated to have M rows and N columns.
+Calling Sequence
+        Y = idct2(X)
+        Y = idct2(X, M, N)
+        Y = idct2(X, [M, N])
+Parameters
+        X: Matrix or integer
+        M, N: If specified Matrix X is padded with M rows and N columns.
+Examples
+     idct2(3, 4, 6)
+     ans =
+         2.811261   0.612372  -0.525856   0.250601   0.612372  -0.086516 */
+function y = idct2 (x, m, n)
+   funcprot(0);
+   rhs=argn(2);
+   select (rhs)
+   case 1 then
+       [m,n]=size(x);
+   case 2 then    
+        n=m(2);
+        m=m(1);
+   end
+   if m==1 then
+       y=idct1(x.',n).';
+   elseif n==1 then
+       y=idct1(x,m);
+   else
+       y=idct1(idct1(x,m).',n).';        
+   end
 endfunction