initial commit

+utils/get_apodization_mask.m

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+% GET_APODIZATION_MASK calculate a 2D circular mask fot smoothing tomogram
+%
+% [circulo] = get_apodization_mask(tomogram, rad_apod, axial_apod, radial_smooth)
+%
+% Inputs:
+%     **tomogram - volume to be apodized 
+%     **rad_apod - number of pixels to be zeroed from edge of the tomogram 
+%     **radial_smooth - smoothness of the apodization in pixels, default = Npix/10
+%     **layer_dim
+% Outputs: 
+%     ++circulo -apodization mask 
+% Written BY YJ based on apply_3D_apodization.m
+
+function [circulo] = get_apodization_mask(Npix, rad_apod, radial_smooth )
+    import utils.*
+    Npix_y = Npix(1);
+    Npix_x = Npix(2);
+        
+    Npix = max(Npix_y,Npix_x);
+    if nargin < 3
+        radial_smooth = Npix/10;
+    end
+    
+    if ~isempty(rad_apod) 
+        xt = -Npix/2:Npix/2-1;
+        [X,Y] = meshgrid(xt,xt);
+        radial_smooth = max(radial_smooth,1); % prevent division by zero 
+        circulo= single(1-radtap(X,Y,radial_smooth,round(Npix/2-rad_apod-radial_smooth)));
+        %size(X)
+        if Npix_y~=Npix_x 
+            circulo= crop_pad( circulo, [Npix_y,Npix_x]);
+        end
+    end
+end