How to draw concentric ellipses within exsisting ellipse....

Hi, I have to draw concentric ellipses (say 2) within existing ellipse...I am attaching plotted ellipse.. How can we draw that..

[Image Analyst]

What does this have to do with image processing (like you tagged it)?

[Walter Roberson]

Mohammad Bhat comments to Image Analyst:

How can You answer like that previously you have answered questions like that

[Walter Roberson]

You tagged this question as being about "image processing". Are you starting with an image that has an ellipse that has to be detected and concentric elipses added? Or are you starting with the list of data points used to make the plot?

[Mohammad Bhat]

I have set of contour points,I enclosed them in minimum ellipsoid,after that I have to draw concentric ellips within that minimum ellipsoid and add bins to the that ellipsis(concentric ,say three) After that i have to construct histogram from each bin,....

[Walter Roberson]

That is not "image processing" or "digital image processing" or even anything to do with "image", like you indicated in your Tags.

[Mohammad Bhat]

which tag I should add

Answer 1

[Walter Roberson]

File Exchange https://www.mathworks.com/matlabcentral/fileexchange/3215-fit-ellipse

Once you know the orientation and the center and semi-major and semi-minor axes, you can construct new ellipses with the same orientation and center and using a linear scaling of the semi-major and semi-minor axes.

[Mohammad Bhat]

Sir, I am using the following function for minimum ellipsoid construction https://in.mathworks.com/matlabcentral/fileexchange/9542-minimum-volume-enclosing-ellipsoid...after that I am getting a minimum ellipsoid covering all the points...From the fucntion [A , c] = MinVolEllipse(P, tolerance)....I am getting center, how to deduce other parametrs of the current ellipse, so that we can modify radii to draw concentric ellipses...

[Walter Roberson]

Call the other function instead.