I'm working on a programme that analyses the contents within an ROI (such as Mean Grey Intensity). The images i want to measure are not clear enough to draw an ROI, but I have an image that is the same size (160x160px) and I would like to draw the ROI on that image and then display that ROI on the other images. I have the images uploaded in "axes" in the app designer. Any help is appreciated.
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Here is what I do:
% User draws curve on image here. hFH = drawfreehand(); % Get the xy coordinates of where they drew. xy = hFH.Position % get rid of imfreehand remnant. delete(hFH); % Overlay what they drew onto the image. hold on; % Keep image, and direction of y axis. xCoordinates = xy(:, 1); yCoordinates = xy(:, 2); plot(xCoordinates, yCoordinates, 'r.', 'LineWidth', 2, 'MarkerSize', 12); caption = sprintf('Original Grayscale Image.\nPoints may not lie on adjacent pixels, depends on your speed of drawing!'); title(caption, 'FontSize', fontSize);
Once you have xCoordinates and yCoordinates, you can save them and apply them to other images, for example by using them to create a mask with poly2mask().
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