> 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/grayscale-augmentation.md).

# グレースケール拡張

データセットの一部に対して、確率的にグレースケールを適用します。

選択した割合は、影響を受けるデータセット内の画像数に適用されます。

## 例

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

<figure><img src="/files/d9c9ccb1b304f3397dff23570b40fd3717b60b1a" alt=""><figcaption><p>Grayscale Augmentation が適用されました</p></figcaption></figure>

## Learn More

* [Machine Learning のために画像にノイズを追加する理由](https://blog.roboflow.com/why-to-add-noise-to-images-for-machine-learning/)


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