---
title: minimumObjectSize
framework: vision
role: symbol
role_heading: Instance Property
path: vision/vndetecttrajectoriesrequest/minimumobjectsize
---

# minimumObjectSize

The minimum radius of the tracked shape’s bounding circle.

## Declaration

```swift
var minimumObjectSize: Float { get set }
```

## Mentioned in

Identifying Trajectories in Video

## Discussion

Discussion Set the minimum size to filter out noise and small objects. The default value is 0, which means to apply no filtering. Changing this property value from frame to frame can produce erratic trajectories because objects either disappear or are added to the tracking based on this filtering. Specify the size in normalized (0.0 to 1.0) coordinates.

## See Also

### Configuring the Request

- [targetFrameTime](vision/vndetecttrajectoriesrequest/targetframetime.md)
- [trajectoryLength](vision/vndetecttrajectoriesrequest/trajectorylength.md)
- [objectMinimumNormalizedRadius](vision/vndetecttrajectoriesrequest/objectminimumnormalizedradius.md)
- [objectMaximumNormalizedRadius](vision/vndetecttrajectoriesrequest/objectmaximumnormalizedradius.md)
- [maximumObjectSize](vision/vndetecttrajectoriesrequest/maximumobjectsize.md)