Hello Daniel, You can follow Hough Transform for line detection.
These two lines from center to circumference will be become two points on the Hough Transform Axes. By comparing the thetas(on theta axis of Hough transform) of these two points correspondign to each line, you can find out theta required for calculating the Arc length. Hope this helps. -Durgesh. On Jan 6, 4:44 am, "Daniel Bastidas" <[EMAIL PROTECTED]> wrote: > Hi. > No. The radius that I talking about is the radius of the circumference, is > the only thing that I know in the original picture, I don´t know the angle > theta, I don´t know the intersecting points between lines and circumference. > I know that I need to find theta to calculate the arc length but I don´t > know how to find it. I tried to build triangles and trigonometric formulas > but I would not have been able to achieve. > bye. > > On Jan 5, 2008 1:01 PM, drugz' <[EMAIL PROTECTED]> wrote: > > > > > > > Which ratio are talking about ? > > > Do you mean, ratio of Arc length with Circumference? > > > On Jan 5, 8:29pm, "Daniel Bastidas" <[EMAIL PROTECTED]> wrote: > > > Hi. > > > > Sorry for my poor english, maybe I don´t explain me well. > > > Ok, if A is the area of the circumference then: > > > *A = PI*r^2* and *r* = radius of the circumference as shown in figure > > > So a mathematic expression for the radius will be: > > > *r = (A/PI)^1/2* > > > > If C is the circumference, *C = **2 * PI * r* then > > > *r = C/2*PI > > > > *Now I hope that I explained well. > > > Don´t worry if you can answer to me, thanks for try. > > > bye. > > > > On Jan 5, 2008 9:38 AM, chandra kumar <[EMAIL PROTECTED]> > > wrote: > > > > > Hi, > > > > By ratio of circumference, I assume L / C (i.e. the ratio of L:C) > > > > > You mentioned that you know that ratio i.e., you know L / C = k, > > > > where k is the ratio of L to C > > > > > which implies L = k * C > > > > > Then by the circumference formula > > > > C = 2 * PI * r > > > > L = k * 2 * PI * r > > > > > By any chance do you mean ratio to be the ratio of radius and > > > > circumference, cause it is always known to 1 / ( 2*PI ) > > > > > Can you write the ratio in a mathematical expression so that I will > > also > > > > understand. But I'm not sure if I can answer that. > > > > > Thanks and Regards, > > > > K.V.Chandra Kumar > > > > > On 05/01/2008, Daniel Bastidas <[EMAIL PROTECTED]> wrote: > > > > > > ups.. sorry > > > > > When I said radio I wanted to said ratio or radius of circumference. > > for > > > > > clarify. > > > > circumference.JPG > > > 6KViewDownload- Hide quoted text - > > > > - Show quoted text -- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algogeeks@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/algogeeks -~----------~----~----~----~------~----~------~--~---
