Detecting updated position of imellipse?

Hi,

I can use getPosition to get the original position of imellipse drawn, however i am unable to find the updated position once the ellipse has moved. I know this can be achieved by right clicking on the image screen, however, I am unsure how to do this automatically through code. Any help you could offer would be appreaciated.

[Image Analyst]

How was the ellipse moved?

[Megan]

I'm using imellipse to select markers in an image, of which there are 12, for callibration purposes. The ellipses are moved manually.

[Image Analyst]

When you move and then double click in the ellipse, are you saying that it does not return the current size and location parameters?

[Megan]

When I double click the ellipse it does return the current size and location parameters. However, I need the current size and location parameters to be returned in script i.e I do not want to have to right click on each of the markers and record the parameters manually to be later fed into the script again. I have tried using getposition(h),where h is the handle to the ellipse object, however it apparently fails to update when the ellipse is dragged to a new position.

[Image Analyst]

It will only give you the parameters once you've finished adjusting it and double click on it, not while you are in the process of making adjustments.

Answer 1

[Philip Caplan]

It looks like you are trying to get the position of the ellipse when you click and drag it interactively. The first example in the documentation for "imellipse" at:

http://www.mathworks.com/help/images/ref/imellipse.html

describes how to use "addNewPositionCallback" to write the current position (as the ellipse moves) to the figure title. A better description of this callback is given at:

http://www.mathworks.com/help/images/ref/imroi.html#addnewposcbk

Similar to the 'position' variable when creating the "imellipse", the input argument to the "addNewPositonCallback" has the same information about the bounding rectangle of the ellipse.