Annotation with rectangles
To learn more about annotation using a rectangle, see the sections:
To rotate the rectangle, pull on the
rotation point. Rotation is done around the center of the rectangle.
To rotate at a fixed angle (multiple of 15 degrees),
shift. In the process of rotation, you can see the angle of rotation.
Annotation with rectangle by 4 points
It is an efficient method of bounding box annotation, proposed here. Before starting, you need to make sure that the drawing method by 4 points is selected.
Track for entering drawing mode. Click on four extreme points:
the top, bottom, left- and right-most physical points on the object.
Drawing will be automatically completed right after clicking the fourth point.
Esc to cancel editing.