---
title: heatMap
framework: vision
role: symbol
role_heading: Instance Property
path: vision/saliencyimageobservation/heatmap
---

# heatMap

A grayscale heat map of important areas across the image.

## Declaration

```swift
let heatMap: PixelBufferObservation
```

## Discussion

Discussion The heat map is a pixel buffer in a one-component floating-point pixel format.

## See Also

### Inspecting an observation

- [RequestDescriptor](vision/requestdescriptor.md)
- [PixelBufferObservation](vision/pixelbufferobservation.md)
- [salientObjects](vision/saliencyimageobservation/salientobjects.md)
- [RectangleObservation](vision/rectangleobservation.md)