To find radius of a circle

[dinesh_IP]

Hi Friends, I am working on one Image processing application where I am capturing the Image of the circular object and by edge detection I am getting the periphery of that circular object. Now I want to find out the radius of the same circular object, can any body guide me how to find the radius of the circle. Regards, Dinesh.

[toxcct]

this is more a math question. if you know the periphery length (let's call it P), then you can do this :

P = 2 * pi * r
r = P / ( 2 * pi)

with r beeing your radius

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TOXCCT >>> GEII power

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[Rage]

dinesh_IP wrote:

I am getting the periphery

Unlike tox, with that I understand that you have access to the points representing the circle on the screen. If you really have the periphery length, then have a look at his post. If you have "captured" a set of points defining the circle, simply look for min and max coordinates in each direction (let's call them xmin,xmax,ymin and ymax), then : radius = (xmax - xmin)/2 or = (ymax - ymin)/2 (both values should be the same). center point of the circle is (xmin + radius, ymin +radius), for instance.

~RaGE();

I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus

[dinesh_IP]

thanks tox.