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Fixed sized positionable rectangular ROI

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ian Handsportman
ian Handsportman on 5 Jul 2020 at 7:47
Commented: ian Handsportman on 5 Jul 2020 at 19:31
I need to select fixed area Rois from a set of images. I have code working fine that uses imrect - the box is drawn, can be dragged around and waits for a mouseclick to record position but I can't suss out how to do it with drawrectangle - for my own satisfation.
The nearest I've got it to draw rectangle with mouse then resize after, which is clunky and I can't figure out how to make that box draggable. Here's the relevant part of the code, obviously there'd be an image open.
% Get positions
for Roicount=1:Roinumber
Framesize = [1 1 Lanelength Lanewidth];
Im1 = imrect(gca, Framesize); %can't see how to do this with drawrectangle
setResizable(Im1,0);
Position = wait(Im1);
for m=1:4 %Store positions
Regions(Roicounter,m)=Position(m);
end
end
The positions are used later to crop out the regions of interest.

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Accepted Answer

Image Analyst
Image Analyst on 5 Jul 2020 at 15:38
Try drawrectangle(). Use can click and drag. Set up a listener that resets the size in the event that they click a handle to change the size.

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ian Handsportman
ian Handsportman on 5 Jul 2020 at 19:31
That seems like long way round to achieve the same result, why is imrect not recommended?

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