> For the complete documentation index, see [llms.txt](https://docs.roboflow.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.roboflow.com/roboflow/roboflow-jp/datasets/dataset-versions/image-augmentation/augmentation-types/90o-rotate-augmentation.md).

# 90º回転拡張

画像をランダムに90度または180度回転します。これにより、モデルがカメラの向きに影響されにくくなります。

* 時計回り: 画像を90度時計回りに回転します。
* 反時計回り: 画像を90度反時計回りに回転します。
* 上下反転: 画像を180度回転します（上下反転）。

## 例

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

<figure><img src="/files/3276cf23541d4424b9fea1abb8ce700971ad2395" alt=""><figcaption><p>90º Augmentation を時計回りに適用</p></figcaption></figure>

<figure><img src="/files/dc26bacdee5ff0c1611d086eb83b277fefa149de" alt=""><figcaption><p>90º Augmentation を反時計回りに適用</p></figcaption></figure>

## Learn More

* [Random Rotate データ拡張を実装する理由と方法](https://blog.roboflow.com/why-and-how-to-implement-random-rotate-data-augmentation/)


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