---
title: digest
framework: coreimage
role: symbol
role_heading: Instance Property
path: coreimage/ciimageprocessoroutput/digest
---

# digest

A 64-bit digest that uniquely describes the contents of the output of a processor.

## Declaration

```swift
var digest: UInt64 { get }
```

## Discussion

Discussion This digest will change if the graph up to and including the output of the processor changes in any way.