initial commit

ptycho/diagnosis/view_grid_artifact_removal.m

@@ -0,0 +1,23 @@
+%view_grid_artifact_removal.m
+
+%% Show phase image and its Fourier magnitude to inspect the effect of grid artifact removal
+close all
+object_roi_ph = angle(object(p.object_ROI{:}));
+%object_roi_ph = angle(object_roi); %old output file
+
+figure    
+imagesc(object_roi_ph); axis image; colormap gray
+figure
+imagesc(abs(fftshift(fft2(object_roi_ph))).^0.2); axis image;
+
+%% Quick way to see the scan step size
+%load scan positions
+ppY = h5read('data_roi0_Ndp128_para.hdf5','/ppY');
+ppX = h5read('data_roi0_Ndp128_para.hdf5','/ppX');
+figure
+subplot(1,2,1)
+plot(diff(ppY),'.')
+title('Vertical')
+subplot(1,2,2)
+plot(diff(ppX),'.')
+title('Horizontal')