> 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/workflows/blocks/blocks/visualize-predictions/circle-visualization.md).

# Circle Visualization

### About this block

The Circle Visualization block lets you draw a circle around detected regions in an image.

This block works with:

* Object detection models
* Segmentation models

<figure><img src="/files/oaSXHqY2bA8jwiFdYmlv" alt=""><figcaption><p>The Label Visualization block.</p></figcaption></figure>

This block only shows circles calculated using the coordinates from an object detection or segmentation model. To see object labels, you will need to add a [Label Visualization](/workflows/blocks/blocks/visualize-predictions/label-visualization.md).

### What you can send into this block

To use this block, you need:

1. An input image or video frame, and;
2. Predictions from an Object Detection or Segmentation model.

### What this block returns

The Circle Visualization block returns an image with a circle drawn around detected regions in an image.

Here is an example output from this block:

<figure><img src="/files/KCvAh5AN7Ov5wR43DyE7" alt=""><figcaption><p>Circles from detected regions displayed on an image.</p></figcaption></figure>

Here is an example when this block is used with a Label Visualization block:

<figure><img src="/files/F1kYtPBkzr9XuK7zhu3B" alt=""><figcaption><p>Circles and labels from an object detection model displayed on an image.</p></figcaption></figure>

### Use cases

This block is useful if you want to see the results from a model on an image. This is common during testing.

Because visualizing predictions adds a small amount of overhead to running a Workflow, we only recommend adding a Visualization in production if you need to see the location of results from your model.