Model was trained using 608x608 input. you need to just change the resolution in cfg file, that's it. YOLOv3 from darknet repo (fork by the famous AlexeyAB) Code here: https://github.com/AlexeyAB/darknet Model: csresnext50-panet-spp-original-optimal.cfg - 65.4% [email protected] (43.2% [email protected]) - 35 FPS - 100.5 BFlops - 217 MB: csresnext50-panet-spp-original-optimal_final.weights