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[BV] Finished exercises 1 through 4 on assignment 9

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Signed-off-by: Jim Martens <github@2martens.de>
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Jim Martens
2016-12-20 11:40:47 +01:00
parent 06d4b4ea2f
commit 49249bf02f
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bv/uebung9_presence.m Normal file
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RGB = imread('gantrycrane.png');
I = rgb2gray(RGB); % convert to intensity
BW = edge(I,'canny'); % extract edges
[H,T,R] = hough(BW,'RhoResolution',0.5,'Theta',-90:0.5:89.5);
% display the original image
subplot(2,1,1);
imshow(RGB);
title('gantrycrane.png');
% display the hough matrix
subplot(2,1,2);
imshow(imadjust(mat2gray(H)),'XData',T,'YData',R,...
'InitialMagnification','fit');
title('Hough transform of gantrycrane.png');
xlabel('\theta'), ylabel('\rho');
axis on, axis normal, hold on;
colormap(hot);
peaks = houghpeaks(H, 50, 'Threshold', 30);
figure, imshow(I), hold on
lines = houghlines(BW, T, R, peaks, 'FillGap', 5, 'MinLength', 15);
for i = 1 : length(lines)
xy = [lines(i).point1; lines(i).point2];
plot(xy(:,1), xy(:,2), 'LineWidth', 1, 'Color', 'r');
end