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# DetectedDocumentObservation

The heat map that’s a pixel buffer in a one-component floating-point pixel format.

```
struct DetectedDocumentObservation
```

## Overview

The observation includes the four corner points of a document’s quadrilateral and saliency masks.

## Topics

### Creating an observation

[`init?(VNRectangleObservation)`](/documentation/Vision/DetectedDocumentObservation/init(_:))

Creates a detected document observation.

### Inspecting an observation

[`enum RequestDescriptor`](/documentation/Vision/RequestDescriptor)

A type that describes the request and revision combination.

[`var globalSegmentationMask: PixelBufferObservation`](/documentation/Vision/DetectedDocumentObservation/globalSegmentationMask)

A pixel buffer representing a segmentation mask for the detected document.

[`struct PixelBufferObservation`](/documentation/Vision/PixelBufferObservation)

An object that represents an image that an image-analysis request produces.

## Relationships

### Conforms To

[`QuadrilateralProviding`](/documentation/Vision/QuadrilateralProviding)

[`Decodable`](/documentation/Swift/Decodable)

[`VisionObservation`](/documentation/Vision/VisionObservation)

[`Escapable`](/documentation/Swift/Escapable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`BoundingBoxProviding`](/documentation/Vision/BoundingBoxProviding)

[`Copyable`](/documentation/Swift/Copyable)

[`Encodable`](/documentation/Swift/Encodable)

[`Sendable`](/documentation/Swift/Sendable)

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

---

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