Extract position of all draw points

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Ali razi
Ali razi on 29 Dec 2021
Edited: Ali razi on 30 Dec 2021
function StartButtonPushed(app, event)
imshow('peppers.png','Parent',app.ImageAxes);
userStopped = false;
pointhandles = gobjects();
while ~userStopped
a = drawpoint(app.ImageAxes);
if ~isvalid(a) || isempty(a.Position)
% End the loop
userStopped = true;
else
% store point object handle
pointhandles(end+1) = a;
end
end
disp(pointhandles)
end

Accepted Answer

Adam Danz
Adam Danz on 29 Dec 2021
Edited: Adam Danz on 29 Dec 2021
1. Add this to the end after the while-loop to get rid of the initial empty handle
pointhandles(1) = [];
2. Extract the position data from the pointhandles vector.
positions = cell2mat(get(pointhandles, 'position'))
positions will be an n*2 matrix of [x,y] coordinates for n points.

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R2021b

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