Figure 7.

Zoomed in image of the bird seen in Figure 6. The yellow rectangles labeled “Bird” show the bounding boxes where birds were detected using the object detection algorithm and the green rectangles show the human identified ground truth. The image on the left used the LBP feature detector and the right used the Haar feature detector. The bounding box identified by the LBP feature detector captures just the body of the bird, excluding the tail, legs, and head. This results in an IoU of 0.46, below the IoU threshold of 0.5. The Haar feature detector surrounds the entire bird, resulting in an IoU of 0.52