---
title: maximumIOUForObjectAbsence
framework: ML Compute
role: symbol
role_heading: Instance Property
platforms: [iOS 14.0+, iPadOS 14.0+, Mac Catalyst 14.0+, macOS 11.0+, tvOS 14.0+]
path: mlcompute/mlcyololossdescriptor/maximumiouforobjectabsence
---

# maximumIOUForObjectAbsence

The negative intersection over union (IOU).

## Declaration

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

## Discussion

Discussion If the prediction IOU with groundTruth is lower than this value, consider this is a confident object absence. The default value is 0.3.

## See Also

### Inspecting YOLO Loss Descriptors

- [anchorBoxCount](mlcompute/mlcyololossdescriptor/anchorboxcount.md)
- [anchorBoxes](mlcompute/mlcyololossdescriptor/anchorboxes.md)
- [minimumIOUForObjectPresence](mlcompute/mlcyololossdescriptor/minimumiouforobjectpresence.md)
- [scaleClassLoss](mlcompute/mlcyololossdescriptor/scaleclassloss.md)
- [scaleObjectConfidenceLoss](mlcompute/mlcyololossdescriptor/scaleobjectconfidenceloss.md)
- [scaleNoObjectConfidenceLoss](mlcompute/mlcyololossdescriptor/scalenoobjectconfidenceloss.md)
- [scaleSpatialPositionLoss](mlcompute/mlcyololossdescriptor/scalespatialpositionloss.md)
- [scaleSpatialSizeLoss](mlcompute/mlcyololossdescriptor/scalespatialsizeloss.md)
- [shouldRescore](mlcompute/mlcyololossdescriptor/shouldrescore.md)