Compared with the v1 version, the v2 version increases the number of training pictures and the number of training steps; the v1 version has a stronger effect, but it is also easier to overfit. The v2 version balances the effect and overfitting.

v2版本与v1版本相比，增加了训练的图片数量与训练步数；v1版本效果较强，但同时也更容易过拟合，v2版本平衡了效果与过拟合。