# 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/mXHEiGg35kYjwl0I4r5p" 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 %}

![](/files/048b5f59faaa169756b3cfddeff104903454f28e)

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

{% stepper %}
{% step %}

#### Enable Regions of Interest

* Navigate to Tool Settings.
* Scroll to the bottom and toggle Regions of Interest to ON.
  {% endstep %}

{% step %}

#### Add a cylinder

* Click the ‘+’ button next to Add Cylinder.
* A default 10-meter radius cylinder will be added.
* Adjust the radius as needed to suit your use case.
  {% endstep %}
  {% endstepper %}

{% hint style="info" %}
Tip: Use the ‘+’ icon to add more cylinders/boxes if multiple regions are required.
{% endhint %}

### Box

{% stepper %}
{% step %}

#### Enable Regions of Interest

* Navigate to Tool Settings.
* Scroll to the bottom and toggle Regions of Interest to ON.
  {% endstep %}

{% step %}

#### Add a box

* Click the ‘+’ button next to Add Box.
* A default 10-meter radius box will be added.
* Adjust the box dimensions as needed to suit your use case.
  {% endstep %}
  {% endstepper %}

{% hint style="success" %} <img src="/files/mXHEiGg35kYjwl0I4r5p" alt="" data-size="line"> Users can create Regions of Interest using both cylinder and cuboid shapes, depending on the area and context of annotation.
{% endhint %}


---

# Agent Instructions: 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.imerit.net/3d-multi-sensor-fusion/labeling/3d-multi-sensor-fusion-labeling-editor/key-features/regions-of-interest.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.