> 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/brightness-augmentation.md).

# 明るさ拡張

画像の明るさに変化を加えて、照明やカメラ設定の変更に対してモデルがより頑健になるようにします。選択した割合に応じて、画像を明るくする、暗くする、またはその両方を選べます。

## 例

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

<figure><img src="/files/fd391fa961c02432e2318bff7e7af08429445c6e" alt=""><figcaption><p>Brightness Augmentation を10% 明るく設定</p></figcaption></figure>

<figure><img src="/files/015926b512f43f0a960a6d39d5e350fb04ac67c9" alt=""><figcaption><p>Brightness Augmentation を10% 暗く設定</p></figcaption></figure>

## FAQ

<details>

<summary>明るさは露出とどう違いますか？</summary>

Brightness Augmentation は、すべてのピクセルに一定の値を加えることで、画像全体を均一に明るくまたは暗くします。

明るさは相対的な強度を考慮しません。影とハイライトが同じように変化するため、コントラストが失われる可能性があります。

</details>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.roboflow.com/roboflow/roboflow-jp/datasets/dataset-versions/image-augmentation/augmentation-types/brightness-augmentation.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.