To create either an axis-aligned or a rotated rectangle, select the menu items OCR ▹ Draw Axis-aligned Rectangle or Draw Rotated Rectangle (also accessible as tool bar button), respectively. For more information about how to draw a rectangular ROI, please refer to the section “Create ROI”. You can also check the ROI data via the button View ROI Data in the Region Of Interest section on the Setup tab. Read more about ROI data in the section Create ROI.
Train a classifier for OCR when you have loaded training data via the menu item Train Now or the corresponding button on the OCR Classifier tab in the section Training.
You can delete an ROI item via the menu item OCR ▹ Delete Selected ROI Item via the corresponding button in the Region Of Interest section on the Setup tab. Read more about ROI data in the section Create ROI. If you want to delete all ROI items, select Delete All ROIs.
Via the menu item OCR ▹ Load ROI from File, you can load a previously saved ROI from a file.
If you want to reuse an ROI, you can save it to a file via the menu item OCR ▹ Save ROI to File.