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> Unreal Engine API Reference > Runtime > GeometryCore > Image > TImageBuilder > TImageBuilder::FastDownsample

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TImageBuilder::FastDownsample

Very basic downsampling technqiue that just averages NxN pixel blocks. Multi-threaded.

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References

Module	GeometryCore
Header	/Engine/Source/Runtime/GeometryCore/Public/Image/ImageBuilder.h
Include	#include "Image/ImageBuilder.h"

Syntax

TImageBuilder< PixelType > FastDownsample
(
    int32 SubSteps,
    const PixelType & ZeroValue,
    TFunctionRef< PixelType(PixelType, int)> AverageFunc
) const

Remarks

Very basic downsampling technqiue that just averages NxN pixel blocks. Multi-threaded.

Parameters

Parameter	Description
SubSteps	each NxN pixel block of this size is averaged into 1 pixel in the output image
Zero	value to use with template PixelType must be provided, pixel values will be added to this value
AverageFunc	Called with Sum(Pixels) and PixelCount, return value is used as new pixel value (eg should be average)