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# VNPixelBufferObservation

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

```
class VNPixelBufferObservation
```

## Overview

This type of observation results from performing a [`VNCoreMLRequest`](/documentation/Vision/VNCoreMLRequest) image analysis with a Core ML model that has an image-to-image processing role. For example, this observation might result from a model that analyzes the style of one image and then transfers that style to a different image.

Vision infers that an <doc://com.apple.documentation/documentation/CoreML/MLModel> object is an image-to-image model if that model includes an image. Its <doc://com.apple.documentation/documentation/CoreML/MLModel/modelDescription> object includes an image-typed feature description in its <doc://com.apple.documentation/documentation/CoreML/MLModelDescription/outputDescriptionsByName> dictionary.

## Topics

### Parsing Observation Content

[`pixelBuffer`](/documentation/Vision/VNPixelBufferObservation/pixelBuffer)

The image that results from a request with image output.

[`featureName`](/documentation/Vision/VNPixelBufferObservation/featureName)

A feature name that the CoreML model defines.

### Getting the supported pixel formats

[`supportedOutputPixelFormats()`](/documentation/Vision/VNGeneratePersonSegmentationRequest/supportedOutputPixelFormats())

Returns a list of output pixel formats that the request supports.


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