Non-mosaic training now carry out aspect ratio resizing. Better performance than square training. Can use --square-training for square resizing.
Mosaic augmentation according to Ultralytics YOLOv5 now. But requires a lot more data. Smaller models tend to perform less effectively now. Can do square-training along with mosaic which helps smaller models also.
With aspect ratio resizing and mosaic (default training settings) larger models can be trained much longer without overfitting.
--square-training
for square resizing.square-training
along with mosaic which helps smaller models also.