---
title: allInstancesMask
framework: vision
role: symbol
role_heading: Instance Property
path: vision/instancemaskobservation/allinstancesmask
---

# allInstancesMask

The resulting mask that represents all instances.

## Declaration

```swift
let allInstancesMask: PixelBufferObservation
```

## Discussion

Discussion A pixel can only correspond to one instance. A 0 represents the background, and all other values represent the indices of the instances.

## See Also

### Getting instances

- [instanceAtPoint(_:)](vision/instancemaskobservation/instanceatpoint(_:).md)
- [allInstances](vision/instancemaskobservation/allinstances.md)
- [PixelBufferObservation](vision/pixelbufferobservation.md)