To Find The Centroid Of Images Using Matlab
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi, Below I am placing my code where I need some help to proceed further.
fx = 3.5:3.5:56; fy = 2; a=128; b=128; c=512;
[x1,y1]=meshgrid(-1:2/511:+1,-1:2/511:+1); circ1=sqrt(x1.^1+y1.^1)<1;
% Aberration z8=sqrt(8).*(3.*x1.^3+3.*x1.*y1.^2-2.*x1);
[x,y] = meshgrid(-1:2/127:+1,-1:2/127:+1); circ=sqrt(x.^2+y.^2)<1; for j1 = numel(fx):-1:1 h{j1} = circ.*cos(pi*(x*fx(j1) + y*fy)); end
M = cell(c/a); M(:) = h; M = cell2mat(M');
%Fourier Transform Before Adding Aberration z1=fftshift(fft2(M,512,512)); q1=abs(z1);
figure(1) imagesc(q1); colormap gray; axis image; axis off title('Focal Spots Without Aberration');
%Fourier Transform After Adding Aberration N=exp(sqrt(-1).*(M+z8)); z2=fftshift(fft2(N,512,512)); q2=abs(z2);
figure(2) imagesc(q2); colormap gray; axis image; axis off title('Focal Spots With Aberration'); %%%%%%%%%%%%%%%%% In the above code, two figures are obtained:fig(1) & fig(2). I need to find the centroid of those white spots(crop the image to consider only the lower row of 16 white spots) in both the figures separately. It will really be a great help for me if anyone helps me out in this regard.
Thanking You!
1 Kommentar
Antworten (1)
Image Analyst
am 9 Sep. 2012
You code doesn't run. What is q1?
You can see how to get centroids from regions in an image (your row of "white spots") by looking at my BlobsDemo image segmentation tutorial: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862
0 Kommentare
Siehe auch
Kategorien
Mehr zu Image Processing Toolbox finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!