initial commit

+utils/pad_2D.m

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+% pad_2D pads a 2D array (in both direction). It's based on Matlab's padarray function
+% Inputs: 
+%   **img                input image
+%   **outsize            size of final image
+% *optional:*
+%   **padval               value to fill padded regions 
+% returns: 
+%   ++imout              cropped image 
+% Written by YJ
+
+function [ imout ] = pad_2D( img, outsize, padval)
+
+Nin = size(img);
+Nout = outsize(1:2);
+
+if Nout(1)<Nin(1) || Nout(2)<Nin(2)
+    disp(size(img))
+    error('Output size is smaller than input image!')
+end
+
+if nargin < 3
+    padval = 0;
+end
+
+pad_pre = [0,0];
+pad_post = [0,0];
+%calculate how much to pad 
+if mod(Nin(1),2)==0 %if input image size is even
+    pad_post(1) = ceil((Nout(1)-Nin(1))/2);
+    pad_pre(1) = floor((Nout(1)-Nin(1))/2);
+else %odd
+    pad_post(1) = floor((Nout(1)-Nin(1))/2);
+    pad_pre(1) = ceil((Nout(1)-Nin(1))/2);
+end
+
+if mod(Nin(2),2)==0 %if input image size is even
+    pad_post(2) = ceil((Nout(2)-Nin(2))/2);
+    pad_pre(2) = floor((Nout(2)-Nin(2))/2);
+else %odd
+    pad_post(2) = floor((Nout(2)-Nin(2))/2);
+    pad_pre(2) = ceil((Nout(2)-Nin(2))/2);
+end
+
+%imout = padarray(img, [(Nout(1)-Nin(1))/2, (Nout(2)-Nin(2))/2],padval);
+
+
+imout = padarray(img, pad_pre,padval,'pre');
+imout = padarray(imout, pad_post,padval,'post');
+
+if ~isreal(img)
+    imout = complex(imout);
+end
+
+end