MATLAB: Roi Position R2019b

roiroiposition

How can I get the position of my drawn rectangle using (drawrectangle(app.UIAxes);) in App designer Matlab?

Best Answer

Hi Aina,

The attached code for an app will let you draw a ROI as a rectangle in UIAxes and store the position of it in MATLAB base workspace as a variable ‘Position’. The position is updated if the any modifications are done to the drawn rectangle like resizing or dragging.

Hope this helps!

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MATLAB: How can we draw a customizable rectangular ROI on an axes using AppDesigner

App Designer errors if the axes is produced through the App Designer GUI. However, if the axes is produced programatically, App Designer finds the axes correctly. To produce the axes programatically, for example:

app.FullImageUIAxes = axes(app.UIFigure, 'Units', 'Pixels', 'Position',[166,84,750,744], 'XTick', [], 'YTick', []);

Then you can use drawrectangle:

app.ROI = drawrectangle(app.FullImageUIAxes, 'Position', [app.ROIposition(1),app.ROIposition(2),app.ROIposition(3),app.ROIposition(4)], 'LineWidth', [1], 'Color', [1 0 0]);

You have to add listeners programatically since you cannot add them through App Designer in this case:

addlistener(app.ROI,'MovingROI', @(varargin)ROIMoving(app, app.ROI));

MATLAB: Fixed sized positionable rectangular ROI

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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Related Solutions

MATLAB: How can we draw a customizable rectangular ROI on an axes using AppDesigner

MATLAB: Fixed sized positionable rectangular ROI

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