# Flip Augmentation

画像をランダムに縦または横に反転（反射）して、モデルが被写体の向きに左右されにくくなるようにします。

* **水平：** 画像の [NumPy 配列](https://numpy.org/) を左右方向に反転します。
* **垂直：** 画像の [NumPy 配列](https://numpy.org/) を上下方向に反転します。

## 例

<figure><img src="/files/b28b4f64a40941f3068ccf4a605d2b34d56af56e" alt=""><figcaption><p>元画像</p></figcaption></figure>

<figure><img src="/files/1126f0e16979a34565eea8ba1efdbbe4c79e60cf" alt=""><figcaption><p>Flip Augmentation 水平</p></figcaption></figure>

<figure><img src="/files/9eb495ca0e2c75e78a2e5765a1e47a4254a57d2d" alt=""><figcaption><p>Flip Augmentation 垂直</p></figcaption></figure>

## Learn More

* [Flip Augmentation がモデルの性能をどのように向上させるかを見る](https://blog.roboflow.com/how-flip-augmentation-improves-model-performance/)


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