Plot Profile
Once you have selected a straight line in your image,
this tool will display the profile (or the evolution) of pixel values along this line.
If you locate your mouse on the window showing the profile, a large cross will indicate the position along the vertical and horizontal axis along the profile at the position of the mouse. Simultaneously, a circle appears in the image, showing where you are along the line.
If you choose this tool, after a line selection that is not a straight one, it won't work. If you choose it after a surface selection, it may block your image...
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