> For the complete documentation index, see [llms.txt](https://docs.imerit-prod.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.imerit-prod.io/annotation-tool/key-features/regions-of-interest.md).

# Regions Of Interest

The tool supports various shapes for Regions of Interest (ROI) tools to help focus annotation efforts on the most relevant parts of the scene.

{% hint style="success" %} <img src="/files/qchq9tcQpS8cX7YBw03I" alt="" data-size="line"> These ROI tools help streamline the annotation process, reduce visual clutter, and enhance productivity by focusing only where it matters.
{% endhint %}

<figure><img src="/files/qShDlFn8wfYEvopRDcvY" alt=""><figcaption></figcaption></figure>

The ROI feature supports

* Rectangular ROI: Draw rectangular-shaped ROIs by defining the desired dimension.
* Cylinder ROI: Circular ROIs can also be created.
* Multiple ROIs: Create and manage multiple ROI shapes within a single frame.
* Visual Cue: Points inside the defined ROI appear brighter to improve visibility and focus.

***

## Use Cases

Customers often require annotations in specific areas, such as:

* The lane directly ahead of the ego vehicle – critical for path planning and obstacle detection.
* A designated area on the opposite side of the road – useful for monitoring incoming traffic or specific scenarios.
* A zone equidistant from the ego vehicle across all sides – helpful for uniform object detection analysis.
* Blind spots caused by the ego vehicle’s size or structure – important for safety-critical annotation tasks.

***

## Steps to Use Regions Of Interest

### Cylinder

1. Navigate to Tool Settings.
2. Scroll to the bottom and toggle Regions of Interest to ON.
3. Click the ‘+’ button next to Add Cylinder.
4. A default 10-meter radius cylinder will be added, which you can adjust as needed to suit your use case.

> **Tip:** Use the **‘+’ icon** to add more cylinders if multiple regions are required.

### Add Box

1. Navigate to Tool Settings.
2. Scroll to the bottom and toggle Regions of Interest to ON.
3. Click the ‘+’ button next to Add Box.
4. A default 10-meter radius cylinder will be added, which you can adjust as needed to suit your use case.

> **Tip:** Use the **‘+’ icon** to add more box if multiple regions are required.

{% hint style="info" %}
Users can create Regions of Interest using **both cylinder and cuboid shapes**, depending on the area and context of annotation.
{% endhint %}