How do I define Regions of Interest (ROI) for vectorization or cropping?
R2V has a very easy to use, region of interest tool that supports circular, rectangular, and free-form polygon regions, or a combinations of these shapes for vectorization and image cropping. Select one of the drawing tools under Image/Region of Interest (ROI) to start. Choose either Rectangle, Circle, or Polygon. R2V supports multiple regions so you can define ROIs as separate areas or area with islands or holes. When multiple region boundaries are defined, caution must be taken to ensure that a region is either included or excluded. The parity rule is used to determine if an area is inside the ROI or outside. It works like this: count the number of boundaries you encounter from the area to the outside of all boundaries. If the number is odd, then the area is inside, if the number is even then it is outside. Once you are in the ROI editing mode, you can use the right mouse button to display the floating pop-up menu to switch to a different drawing mode. The currently selected drawing
