Figure 5.
Two vertically arranged photographs present a rectangular block covered with a checker pattern mounted beneath a sensor assembly. Both photographs contain a labelled annotation area marked Labeling location with a coordinate marker labelled open bracket x comma y close bracket positioned near the centre of the block. In the upper photograph, a tall narrow bounding box surrounds the coordinate marker. Vertical and horizontal double-headed arrows indicate the bounding box dimensions labelled h and b. In the lower photograph, a smaller square-shaped bounding box surrounds the coordinate marker with corresponding dimension arrows labelled h and b. Both photographs illustrate different bounding box proportions centred around the same labelled coordinate position on the checker-pattern block.Example of partial area labelling and tracking: (a) partial area tracking unit located at the intersection of black-and-white checks in the centre (10 × 10 mm); and (b) larger partial area tracking unit (20 × 10 mm)