Mosaic

display image
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load 'C:\Users\admin\Desktop\mosaic.mat'
image(mosaic)
colormap(gray(256))

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I=imread('imagename.pbm');
F=fft2(double(I));

F=fft2(double(mosaic));
S=fftshift(F);
L=log2(S);
A=abs(L);
imagesc(A)

F2=fft2(double(mosaic));
L2=log2(F2);
A2=abs(L2);
imagesc(A2)


mask2
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load 'mosaic';
y = fft2(mosaic);
mask = zeros(569,800);
myMask2 = createMask2(mask,y,**amount of boxes**);
y2 = y.*myMask2;
z = ifft2(y2);
image(256*(abs(z))/max(max(abs(z))));

masks
------
y=fft2(mosaic);


mask = zeros(569,800);
mask(1:30,1:30)=1;
mask(1:30,226:256)=1;
mask(226:256,1:30)=1;
mask(226:256,226:256)=1;
image(256*mask)

mask = zeros(256,256);
mask(1:30,1:30)=1;
mask(1:30,226:256)=1;
mask(226:256,1:30)=1;
mask(226:256,226:256)=1;
image(256*mask)


------
function mask = createCircleMask(cx,cy,ix,iy,r)
[x,y]=meshgrid(-(cx-1):(ix-cx),-(cy-1):(iy-cy));
mask=((x.^2+y.^2)<=r^2);
image(256*mask);