To Remove Spaces In Between The Images And Assign Indices For Each Image
Asked by Pranjal Pathak on 9 Aug 2012
Latest activity Commented on by Pranjal Pathak on 7 Sep 2012
Hi,
I have written a Matlab coding to generate an array of holograms(4x4) as follows:
a=-1:2/127:+1; b=-1:2/127:+1; [X, Y]=meshgrid(a,b); r=sqrt(X.^2+Y.^2)<1;
Z4=sqrt(3).*(2.*(X.^2+Y.^2)-1); Z5=2.*sqrt(6).*X.*Y; Z6=sqrt(6).*(X.^2-Y.^2); Phi=(Z4+Z5+Z6); mx=30; my=25; i=sqrt(-1); Tau=mx.*X+my.*Y; Theta=Phi+Tau;
if cos(Theta)>=0
t=1;
else
t=0;
end
t=(1/2)+(1/pi)*(exp(i*Theta)+exp(-i*Theta)-(1/3)*(exp(i*3*Theta)+(exp(-i*3*Theta)+(1/5)*(exp(i*5*Theta)+(exp(-i*5*Theta))))));
h=t.*r;
figure(1)
imagesc(h),colormap gray
xlabel('X-Cordinate');
ylabel('Y-Cordinate');
title('Binary Hologram');
b=fftshift(fft2(t,256,256));
figure(2)
imagesc(abs(b)),colormap gray
title('FFT Of Binary Hologram');
figure(3)
for k =1:16
p(i,j)=subplot(4,4,k);
imagesc(h),colormap gray;axis image;axis off
end
*****************
When you run the following program, in figure(3) you will find an array of holograms. My problem is that how can I remove the spaces in between the consecutive holograms so that one hologram just touches the other? Also how can I assign indices to each particular hologram in fig.(3), so that I can further modify any particular hologram according to my need?
Can anyone please help me out in this regard?
Thanking You!
Products
No products are associated with this question.
1 Answer
Answer by Margarita on 9 Aug 2012
Edited by Walter Roberson on 10 Aug 2012
Accepted answer
Hi Pranjal,
a simple solution is to make a matrix that contains 16 copies of your hologram in an arrangement of 4X4,then each location in this arrangement M(i,j) might have different holograms (h1, h2, h3... h16)
[a, b] = size(h); M = zeros(size(h)*4); %M(4X4)
h1 = h; h2 = h; h3 = h; h4= h; h5 = h; h6 = h; h7 = h; h8= h; h9 = h; h10 = h; h11 = h; h12= h; h13 = h; h14 = h; h15 = h; h16= h;
M(1:a, 1:b) = h1; %M(1, 1) M(a+1:a*2, 1:b) = h2; %M(2, 1) M(2*a+1:a*3, 1:b) = h3; %M(3, 1) M(3*a+1:a*4, 1:b) = h4; %M(4, 1)
M(1:a, b+1:b*2) = h5; %M(1, 2) M(a+1:a*2, b+1:b*2) = h6; %M(2, 2) M(2*a+1:a*3, b+1:b*2) = h7; %M(3, 2) M(3*a+1:a*4, b+1:b*2) = h8; %M(4, 2)
M(1:a, 2*b+1:b*3) = h9; %M(1, 3) M(a+1:a*2, 2*b+1:b*3) = h10; %M(2, 3) M(2*a+1:a*3, 2*b+1:b*3) = h11; %M(3, 3) M(3*a+1:a*4, 2*b+1:b*3) = h12; %M(4, 3)
M(1:a, 3*b+1:b*4) = h13; %M(1, 4) M(a+1:a*2, 3*b+1:b*4) = h14; %M(2, 4) M(2*a+1:a*3, 3*b+1:b*4) = h15; %M(3, 4) M(3*a+1:a*4, 3*b+1:b*4) = h16; %M(4, 4)
figure(4) imagesc(M); axis off
1 Comment
0 Comments