Extract region/outline coordinates using ginput
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi, I have to boundary line over a coin. My question is how can I get only the region coordinates which is marked by two ginput crosshairs.
Thanks in advance.
I = imread('coins.png');
imshow(I)
BW = im2bw(I);
imshow(BW)
dim = size(BW)
col = round(dim(2)/2)-90;
row = min(find(BW(:,col)))
boundary = bwtraceboundary(BW,[row, col],'N');
imshow(I)
hold on;
plot(boundary(:,2),boundary(:,1),'b','LineWidth',2);
[x, y] = ginput(2);
plot(x, y,'r+','MarkerSize', 11);
0 Kommentare
Antworten (1)
Image Analyst
am 11 Okt. 2017
I'm not sure what you want to do. You can get the boundaries of all binary blobs using bwboundaries(), not bwtraceboundary():
boundaries = bwboundaries(BW);
Beyond that, I have no idea what you're trying to do by asking the user to click two points somewhere in the image.
6 Kommentare
Image Analyst
am 12 Okt. 2017
Did you see the example in the documentation? Probably not. So look at it. You can get the x and y coordinates like this:
[cx,cy,c] = improfile(I)
Siehe auch
Kategorien
Mehr zu Visual Exploration 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!