# TryAcquirePackedSceneSegmentationChannelsCpuImage

Source: https://www.nianticspatial.com/docs/api/unity/NianticSpatial.NSDK.AR.SceneSegmentation.ARSceneSegmentationManager.TryAcquirePackedSceneSegmentationChannelsCpuImage/

TryAcquirePackedSceneSegmentationChannelsCpuImage

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## Declaration

public bool TryAcquirePackedSceneSegmentationChannelsCpuImage(out XRCpuImage cpuImage, out Matrix4x4 samplerMatrix, Nullable<XRCameraParams> cameraParams = null)

#### Summary

Tries to acquire the latest packed semantic channels XRCpuImage. Each element of the XRCpuImage is a bit field
    indicating which semantic channels have surpassed their respective detection confidence thresholds for that
    pixel. (See GetChannelIndex)

#### Remarks

The utility GetChannelNamesAt can be used for reading semantic channel names at a viewport
    location.

#### Returns

True if the CPU image was acquired. Otherwise, false

### Parameters

| Name | Type | Summary |
| --- | --- | --- |
| cpuImage | XRCpuImage | If this method returns `true`, an acquired XRCpuImage. The CPU image must be disposed by the caller. |
| samplerMatrix | Matrix4x4 | A matrix that converts from viewport to image coordinates according to the latest pose. |
| cameraParams | Nullable<XRCameraParams> | Params of the viewport to sample with. Defaults to current screen dimensions if null. |

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