Locate unlabelled areas

In some 2D segmentation tasks, you must annotate the whole frame before moving on to the next task. However, detecting and locating smaller gaps you might have missed during your annotation process can be difficult. With this tool, you will be able to locate these unlabeled areas. 

A red dot will then be placed on the icon which indicates that you have areas left to annotate. Once the red dot has gone away, you know that the frame has been fully annotated and you can submit the task.