> For the complete documentation index, see [llms.txt](https://docs.imerit.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.imerit.net/3d-multi-sensor-fusion/labeling/3d-multi-sensor-fusion-labeling-editor/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" %} 
These ROI tools help streamline the annotation process, reduce visual clutter, and enhance productivity by focusing only where it matters.
{% endhint %}
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" icon="lightbulb-on" %}
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="info" icon="lightbulb-on" %}
Users can create Regions of Interest using both cylinder and cuboid shapes, depending on the area and context of annotation.
{% endhint %}
---
# 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 by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://docs.imerit.net/3d-multi-sensor-fusion/labeling/3d-multi-sensor-fusion-labeling-editor/key-features/regions-of-interest.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
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.