drawcircle function in while loop does NOT store data

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MP
MP 2020-5-25
评论： Xingwang Yong 2020-10-16
Hello everyone,
I need to select multiple ROIs from a figure so I am using the function drawcircle. Since I need multiple rois, I added a while loop and halt it with a STOP button. However, the drawcircle function works outside the loop, but it does not store the info when within it.
That's the code I am using:
figure;
imagesc(your_figure_here)
H = uicontrol('Style', 'PushButton', ...
'String', 'Break', ...
'Callback', 'delete(gcbf)');
n=0;
while (ishandle(H))
n=n+1;
roi()= drawcircle()
end

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回答（1 个）

Ernesto Salcedo
Ernesto Salcedo 2020-9-4
How about something like this
figure;
imshow(img)
crater_mask = false(size(img));
H = uicontrol('Style', 'PushButton', ...
'String', 'STOP', ...
'Callback', 'delete(gcbf)');
while ishandle(H)
roi = drawcircle;
if ishandle(roi)
wait(roi); % wait for double click
crater_mask = roi.createMask | crater_mask;
end
end
imshowpair(img,crater_mask)

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