Tugas Pengolahan Citra dan Pengenalan Pola (Plotting the Radon Transform, Viewing the Radon Transform as an Image, dan Compute the Radon transform of the edge image)

Plotting the Radon Transform

I = zeros(100,100);

I(25:75, 25:75) = 1;

imshow(I)

[R,xp] = radon(I,[0 45]);

figure; plot(xp,R(:,1)); title('R_{0^o} (x\prime)')

Viewing the Radon Transform as an Image

theta = 0:180;

[R,xp] = radon(I,theta);

imagesc(theta,xp,R);

title('R_{\theta} (X\prime)');

xlabel('\theta (degrees)');

ylabel('X\prime');

set(gca,'XTick',0:20:180);

colormap(hot);

colorbar

I = fitsread('solarspectra.fts');

I = mat2gray(I);

BW = edge(I);

imshow(I), figure, imshow(BW)

Compute the Radon transform of the edge image.

theta = 0:179;

[R,xp] = radon(BW,theta);

figure, imagesc(theta, xp, R); colormap(hot);

xlabel('\theta (degrees)'); ylabel('x\prime');

title('R_{\theta} (x\prime)');

colorbar

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