Randomly position an ellipse and create a cutout

I am attempting to randomly position ellipses onto an image and create cut outs from them (the end goal is to create multiple ellipse cutouts from the image). I have previously found imellipse - however my code is getting stuck whilst waiting for the position I think (orignally from a previous Ask https://au.mathworks.com/matlabcentral/answers/335146-how-can-i-automatically-crop-an-image-in-an-elliptical-shape )

I=imread('background.png');
h = imshow(I) ;
%%call imellipse
% set some positon for ellipse 
x = 100;
y = 150;
d1 = 10;
d2 = 100;
e = imellipse(gca, [x y d1 d2]);
% wait to change the positon 
position = wait(e);
% update the positon 
pos = getPosition(e);
x = pos(1);
y = pos(2);
d1 = pos(3);
d2 = pos(4);
%
BW = createMask(e,h);
% here assuming your image is uint8
BW = uint8(BW);
I2 = I.*BW; % everything outside circle to black
imwrite(I2,'oval_cropped.png','Transparency',0);

I also found from searching Random2d which allows me to randomly position a rectangle onto the image as well as use it to create crops ( https://au.mathworks.com/help/images/ref/randomwindow2d.html )

I = imread("background.png");
imshow(I)

inputSize = size(I);
targetSize = [40 60];

rect = randomWindow2d(inputSize,targetSize);

rectXYWH = [rect.XLimits(1) rect.YLimits(1) ... 
    diff(rect.XLimits)+1 diff(rect.YLimits)+1];

annotatedI = insertShape(I,"rectangle",rectXYWH,"LineWidth",3);
imshow(annotatedI)

Answer 1

[DGM]

Depending on what you mean by "crop", this may suffice:

https://www.mathworks.com/matlabcentral/answers/314089-how-can-i-apply-an-oval-mask-to-extract-face-region#answer_1197010

That uses a joke tool to create a mask containing arbitrarily positioned/rotated ellipses (and other shapes), and it doesn't require figure thrashing or manual user interaction.

If you're after something else, you'll need to elaborate.