How to draw circle with imellipse?
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Steven
le 18 Jan 2014
Modifié(e) : Image Analyst
le 18 Fév 2019
Hi
I want to draw a circle with imellipse. I used something like:
AA = imellipse(gca,[xmin ymin radius radius]);
but I can only specify the xmin and ymin of the circle, while I want to specify the center.
How can I do so?
Thanks!
Steven
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Image Analyst
le 18 Jan 2014
2 commentaires
Image Analyst
le 18 Jan 2014
Modifié(e) : Image Analyst
le 18 Jan 2014
If you really want to do it with imellipse, you can just compute the xmin and ymin from the diameter. By the way, imellipse takes width and height (diameter) not radius.
diameter = 10;
radius = diameter / 2;
xCenter = 60;
yCenter = 30;
xMin= xCenter - radius;
yMin = yCenter - radius;
hEllipse = imellipse(gca,[xMin, yMin, diameter, diameter]);
% Plot center
hold on;
plot(xCenter, yCenter, 'r+', 'LineWidth', 5, 'MarkerSize', 20);
grid on;
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Tim Jackman
le 25 Sep 2018
In R2018b you can create a circular ROI with the drawcircle function.
3 commentaires
Image Analyst
le 18 Fév 2019
Modifié(e) : Image Analyst
le 18 Fév 2019
It does have a 'DrawingArea' option to restrict the drawing area to what you specify.
Have you tried waitfor()?
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