Minor changes in MBA

functions/phaseRetrieval/directContrast/phaserec_mba.m

@@ -105,20 +105,20 @@ switch (settings.reg_type)
     case 'none'
         % avoid division by 0
         laplaceKernel(0,0) = 1;
-        filterKernel = 1 ./ laplaceKernel;
+        filterKernel = 1 ./ (-laplaceKernel);
         % set zero frequency (singularity) to 0
         filterKernel(0,0) = 0;
     case 'mba'
-        filterKernel = -1 ./ (-laplaceKernel + settings.reg_alpha);
+        filterKernel = 1 ./ (-laplaceKernel + settings.reg_alpha);
     case 'tikhonov'
-        filterKernel = laplaceKernel ./ (laplaceKernel.^2 + settings.reg_alpha^2);
+        filterKernel = -laplaceKernel ./ (laplaceKernel.^2 + settings.reg_alpha^2);
     otherwise
         error(['Invalid reg_method ' settings.reg_method])
 
 end
 
 % apply inversion filter kernel to reconstruct the phase
-phase = (-2 * pi * fresnelNumber) * real(ifft2(fft2(hologramPadded-1).*filterKernel));
+phase = (2 * pi * fresnelNumber) * real(ifft2(fft2(hologramPadded-1).*filterKernel));
 
 % undo padding
 phase = croparray(phase, [settings.pady, settings.padx]);