draw a set of circles on a given image

1 次查看（过去 30 天）
thoraya
thoraya 2012-6-6
评论： Chetan Pattebahadur 2018-9-11
hi; I have a set of circles where each circle is defined by its center position (x,y) and its radius r. i want to find a way in order to draw those circles on a given image* Img* . i used a matrix with three columns [x y r] to store the set of circles. any idea please? thank you

请先登录，再回答此问题。

采纳的回答

Elad
Elad 2012-6-6
imshow(image);
hold on
% x, y: Center of the circle
% r: Radius of the circle
theta = 0 : (2 * pi / 10000) : (2 * pi);
pline_x = r * cos(theta) + x;
pline_y = r * sin(theta) + y;
plot(pline_x, pline_y, '-');
hold off
  6 个评论
显示 4更早的评论
Ryan
Ryan 2012-6-7
Your comment is showing. You can use that method to plot any pair of x,y vectors on top of an image, you just need to know the equation that defines the shape.
Chetan Pattebahadur
Chetan Pattebahadur 2018-9-11
is not working on my image. I want 1d 2d and 3d like r1 r2 and r3 circle on my image how can I add, please help me

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Image Arithmetic 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by