crop an image with control points

hi every body. i have a ct image and i want to crop a ROI which is ellipse like but i dont want to use imellipse to creat a mask and crop it because it doesnt result well.

i want to creat a ellipse mask with 4 control points which are 4 vertexes of the ellipse. i want a program to first imshow the image for operator to mark 4 control points, then creates the ellipse mask in order to crop the image

can anyone help me with this please

BR

[Image Analyst]

What is the result of imellipse() that "doesnt result well"? What are you doing with it's roi returned variable, and why is that returned variable no good?

[talayeh ghodsi]

because the shape is not exactly ellipse and the adjacent shapes are included in the ellips that are not allowed.

the image attached is the desired croped which i have done in with imfreehand.

Answer 1

[KALYAN ACHARJYA]

For code you are requested to contact me through author page

(Or email:[e-mail]).

The code belongs to me and this ongoing work is not published yet, when it will get published I will upload it here.

[talayeh ghodsi]

I have sent an email to you sir.