Table 2.

Differences of characteristics of YOLO and YOLO v2 (unit: px).

Characteristic		YOLO	YOLO v2
Feature Extractor		Darknet	Darknet-19 448 × 448
Input size	Training from scratch using ImageNet dataset	224 × 224	448 × 448
	Training by fine-tuning using Pascal VOC or MS COCO dataset	448 × 448	448 × 448
	Testing	448 × 448	448 × 448