This tool is designed for the user to determine which text and image parts of the PDF file belong together. This is done by drawing a rectangle around the elements that belong together. The boxes can be then applied to the document.
Annotation Groups: The tool has three checkboxes at the bottom which allow the user to let the undesired bounding boxes disappear. There are three different types of boxes: Groups, Group Annotations, and Unused Annotations. The Annotation Groups are the bounding boxes that have been drawn by the user to specify a certain group and are already classified as a group (clicking the 'New Group' button). These boxes can be applied to the document. The Group Annotations are all bounding boxes that are contained in the currently selected group. They are drawn in the color green. The Unused Annotations are all bounding boxes that have not been selected, these appear in blue. When the tool is first opened all boxes will be blue, also if the user decides to reset the document they will all appear.
The tool has three buttons: Reset, New Group, and Apply. Reset changes deletes any boxes that have been applied and restores the original contents of the document. New Group classifies the group that is selected and which appears in the little preview panel below the buttons as one group. Apply transfers the bounding boxes that have been determined to be groups into the main document.Example:
Authors: Rob Kooper, Peter Bajcsy. Documentation: Peter Ferak.