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# Decompression Filtering

Filter data prior to decompression.

## Topics

### Filtering Data Prior to Decompressing

[`func vImagePNGDecompressionFilter(UnsafePointer<vImage_Buffer>!, vImagePixelCount, vImagePixelCount, UInt32, UInt32, UInt32, vImage_Flags) -> vImage_Error`](/documentation/Accelerate/vImagePNGDecompressionFilter(_:_:_:_:_:_:_:))

Performs PNG decompression filtering.

### Constants

  <doc://com.apple.accelerate/documentation/Accelerate/1515413-png-filter-types>

## See Also

  [vImage Programming Guide](https://developer.apple.com/library/archive/documentation/Performance/Conceptual/vImage/Introduction/Introduction.html#//apple_ref/doc/uid/TP30001001)


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