---
title: NormalizedCircle
framework: vision
role: symbol
role_heading: Structure
path: vision/normalizedcircle
---

# NormalizedCircle

The center point and radius of a 2D circle.

## Declaration

```swift
struct NormalizedCircle
```

## Topics

### Creating a normalized circle

- [init(center:radius:)](vision/normalizedcircle/init(center:radius:).md)
- [zero](vision/normalizedcircle/zero.md)

### Inspecting a normalized circle

- [center](vision/normalizedcircle/center.md)
- [radius](vision/normalizedcircle/radius.md)

### Determining whether the circle contains a point

- [contains(_:)](vision/normalizedcircle/contains(_:).md)
- [contains(_:inCircumferentialRingOfWidth:)](vision/normalizedcircle/contains(_:incircumferentialringofwidth:).md)

### Getting the bounding circle

- [boundingCircle(for:)](vision/normalizedcircle/boundingcircle(for:).md)

## See Also

### Image locations and regions

- [NormalizedPoint](vision/normalizedpoint.md)
- [NormalizedRect](vision/normalizedrect.md)
- [NormalizedRegion](vision/normalizedregion.md)
- [BoundingBoxProviding](vision/boundingboxproviding.md)
- [BoundingRegionProviding](vision/boundingregionproviding.md)
- [QuadrilateralProviding](vision/quadrilateralproviding.md)
- [CoordinateOrigin](vision/coordinateorigin.md)