Plot concentric circle on an image
21 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
HAINGKHARRAN GUNASEKARAN
el 9 de Jun. de 2021
Comentada: HAINGKHARRAN GUNASEKARAN
el 10 de Jun. de 2021
Hello, I wish to draw concentric circles on an image. The radius of each circle is known. The circles are to be plot on the specific position of picture whereby every circle has the same centre. How may i able to do it? The following syntax below is used to generate the concentric circles. I wish to do that on an image. Plus, the circles should be drawn on image with right scalling. Thank you.
%Syntax for concentric circles
theta = [-pi:pi/36:pi];
hold on;
for r=[5,10,15]
plot(r * cos(theta), r * sin(theta))
end
0 comentarios
Respuesta aceptada
KSSV
el 9 de Jun. de 2021
I = imread('peppers.png') ;
[m,n,p] = size(I) ;
C = round([n m]/2) ; % center of circle
th = linspace(0,2*pi) ;
imshow(I)
hold on
% draw concentric circle
for r = 5:5:50
x = C(1)+r*cos(th) ;
y = C(2)+r*sin(th) ;
plot(x,y)
end
6 comentarios
Image Analyst
el 9 de Jun. de 2021
Like
for radius = 5 : 5 : 50
message = sprintf('Click where you want the center to be');
uiwait(helpdlg(message));
[xCenter, yCenter] = ginput(1);
x = radius * cos(th) + xCenter;
y = radius * sin(th) + yCenter;
plot(x, y, '-');
end
Más respuestas (0)
Ver también
Categorías
Más información sobre Formatting and Annotation en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!