Draw freehand a contour in alternate blue/yellow color to be visible on top of various pictures and get a set of X,Y coordinates of all the contour pixels
requires to open figure first and put "hold on"
Leon Peshkin (2022). Freehand Contour Drawing (https://www.mathworks.com/matlabcentral/fileexchange/8262-freehand-contour-drawing), MATLAB Central File Exchange. Retrieved .
MATLAB Release Compatibility
Platform CompatibilityWindows macOS Linux
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