# Create and save imfreehand() positions until the user clicks a button to finish

Hi,

I want an image to open and the user to draw ROI with imfreehand() until they are finished — with the co-ordinates saved into structured array — — the following code does it for 3 regions of interest — — but how can i do this until the user is finished? Would be good to have an undo button too — which not only deletes the region of interest but also deletes xy co-ordinates in the array.

Thanks!!

`img = imread('myfig.jpg')      imshow(img)      i = 1;       for i = 1:3          hFH(i) = imfreehand();           xy{i}  = hFH(i).getPosition;      end`

NOTE:-

Matlabsolutions.com provide latest MatLab Homework Help,MatLab Assignment Help for students, engineers and researchers in Multiple Branches like ECE, EEE, CSE, Mechanical, Civil with 100% output.Matlab Code for B.E, B.Tech,M.E,M.Tech, Ph.D. Scholars with 100% privacy guaranteed. Get MATLAB projects with source code for your learning and research.

You could use

`img = imread('myfig.jpg')imshow(img)i = 1;finished = 'NO';i = 1;while strcmpi(finished,'NO')  hFH(i) = imfreehand();  finished = questdlg('Finished?', ...      'confirmation', ...      'YES', 'NO', 'UNDO', 'NO');  if strcmpi(finished, 'UNDO')      delete(hFH(i))      finished = 'NO';  else      xy{i}  = hFH(i).getPosition;      i = i + 1;  endend`

--

--

## More from Technical Source

Simple! That is me, a simple person. I am passionate about knowledge and reading. That’s why I have decided to write and share a bit of my life and thoughts to.

Love podcasts or audiobooks? Learn on the go with our new app.

## Technical Source

Simple! That is me, a simple person. I am passionate about knowledge and reading. That’s why I have decided to write and share a bit of my life and thoughts to.