mpsnndefaultpadding(3) mojave man page | unix.com

MPSNNDefaultPadding(3)					 MetalPerformanceShaders.framework				    MPSNNDefaultPadding(3)

NAME
       MPSNNDefaultPadding

SYNOPSIS
       #import <MPSNeuralNetworkTypes.h>

       Inherits NSObject, and <MPSNNPadding>.

   Instance Methods
       (NSString *__nonnull) - label

   Class Methods
       (instancetype __nonnull) + paddingWithMethod:
       (instancetype __nonnull) + paddingForTensorflowAveragePooling
       (instancetype __nonnull) + paddingForTensorflowAveragePoolingValidOnly

Method Documentation
   - (NSString * __nonnull) label
       Human readable description of what the padding policy does

   + (instancetype __nonnull) paddingForTensorflowAveragePooling
       A padding policy that attempts to reproduce TensorFlow behavior for average pooling  Most TensorFlow padding is covered by the standard
       MPSNNPaddingMethod encodings. You can use +paddingWithMethod to get quick access to MPSNNPadding objects, when default filter behavior
       isn't enough. (It often is.) However, the edging for max pooling in TensorFlow is a bit unusual.

       This padding method attempts to reproduce TensorFlow padding for average pooling. In addition to setting MPSNNPaddingMethodSizeSame |
       MPSNNPaddingMethodAlignCentered | MPSNNPaddingMethodAddRemainderToBottomRight, it also configures the filter to run with
       MPSImageEdgeModeClamp, which (as a special case for average pooling only), normalizes the sum of contributing samples to the area of valid
       contributing pixels only.

       // Sample implementation for the tensorflowPoolingPaddingPolicy returned
	-(MPSNNPaddingMethod) paddingMethod{ return MPSNNPaddingMethodCustom | MPSNNPaddingMethodSizeSame; }

	-(MPSImageDescriptor * __nonnull) destinationImageDescriptorForSourceImages: (NSArray <MPSImage *> *__nonnull) sourceImages
								       sourceStates: (NSArray <MPSState *> * __nullable) sourceStates
									  forKernel: (MPSKernel * __nonnull) kernel
								suggestedDescriptor: (MPSImageDescriptor * __nonnull) inDescriptor
	{

	   ((MPSCNNKernel *)kernel).edgeMode = MPSImageEdgeModeClamp;

	   return inDescriptor;
	}

   + (instancetype __nonnull) paddingForTensorflowAveragePoolingValidOnly
       Typical pooling padding policy for valid only mode

   + (instancetype __nonnull) paddingWithMethod: (MPSNNPaddingMethod) method
       Fetch a well known object that implements a non-custom padding method  For custom padding methods, you will need to implement an object
       that conforms to the full MPSNNPadding protocol, including NSSecureCoding.

       Parameters:
	   method A MPSNNPaddingMethod

       Returns:
	   An object that implements <MPSNNPadding> for use with MPSNNGraphNodes.

Author
       Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code.

Version MetalPerformanceShaders-100				  Thu Feb 8 2018					    MPSNNDefaultPadding(3)