Learn Java with Math: Using Fun Projects and Games

© Ron Dai 2019

R. DaiLearn Java with Mathhttps://doi.org/10.1007/978-1-4842-5209-3_31

31. IOU Computation

Ron Dai¹ 

(1)

Seattle, WA, USA

 

IOU means “Intersection Over Union.” It is used as a metric in image detection technology. This metric computes a ratio of the overlap area between two rectangles over their union area. For simplicity, the two rectangles are in the same direction, as you will see R1 and R2 in Figure 31-1.

Figure 31-1

Two rectangles and their overlap

To figure out this ratio, we need to find out their overlap area named X. If the areas for the two rectangles are R1.area and R2.area, then

• IOU = X / (R1.area + R2.area – X)

We define the location ...