mojave man page for mpscnnsubtractgradient

MPSCNNSubtractGradient(3)				 MetalPerformanceShaders.framework				 MPSCNNSubtractGradient(3)

NAME
       MPSCNNSubtractGradient

SYNOPSIS
       #import <MPSCNNMath.h>

       Inherits MPSCNNArithmeticGradient.

   Instance Methods
       (nonnull instancetype) - initWithDevice:

   Additional Inherited Members
Detailed Description
       This depends on Metal.framework.  Specifies the subtraction gradient operator. This arithmetic gradient filter requires the following
       inputs: gradient image from the previous layer (going backwards) and either the primary or the secondary source image from the forward
       pass. You will need a separate filter for the primary and secondary source images.

       Without broadcasting, the arithmetic subtract gradient operation for the primary source image is a copy operation on the input gradient
       image (for x - y, d/dx(x - y) = 1). This copy operation can be optimized away by the graph interface.

       For the secondary source image, the result is a negation of the gradient image from the previous layer (for x - y, d/dy(x - y) = -1).

       Setting the broadcasting parameters results in a reduction operation (sum) across all of the applicable broadcasting dimensions (rows,
       columns, feature channels, or any combination thereof) to produce the destination image of the size that matches the primary/secondary
       input images used in the forward pass.

Method Documentation
   - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device
       Initialize the subtraction gradient operator.

       Parameters:
	   device The device the filter will run on.

       Returns:
	   A valid MPSCNNSubtractGradient object or nil, if failure.

       Reimplemented from MPSCNNArithmeticGradient.

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

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