mpsimagemedian(3) [mojave man page]
MPSImageMedian(3) MetalPerformanceShaders.framework MPSImageMedian(3) NAME
MPSImageMedian SYNOPSIS
#import <MPSImageMedian.h> Inherits MPSUnaryImageKernel. Instance Methods (nonnull instancetype) - initWithDevice:kernelDiameter: (nullable instancetype) - initWithCoder:device: (nonnull instancetype) - initWithDevice: Class Methods (NSUInteger) + maxKernelDiameter (NSUInteger) + minKernelDiameter Properties NSUInteger kernelDiameter Additional Inherited Members Detailed Description MPSImageMedian.h MetalPerformanceShaders.framework Copyright: Copyright (c) 2015 Apple Inc. All rights reserved. MetalPerformanceShaders median filters The MPSImageMedian applies a median filter to an image. A median filter finds the median color value for each channel within a kernelDiameter x kernelDiameter window surrounding the pixel of interest. It is a common means of noise reduction and also as a smoothing filter with edge preserving qualities. NOTE: The MPSImageMedian filter currently only supports images with <= 8 bits/channel. Method Documentation - (nullable instancetype) initWithCoder: (NSCoder *__nonnull) aDecoder(nonnull id< MTLDevice >) device NSSecureCoding compatability While the standard NSSecureCoding/NSCoding method -initWithCoder: should work, since the file can't know which device your data is allocated on, we have to guess and may guess incorrectly. To avoid that problem, use initWithCoder:device instead. Parameters: aDecoder The NSCoder subclass with your serialized MPSKernel device The MTLDevice on which to make the MPSKernel Returns: A new MPSKernel object, or nil if failure. Reimplemented from MPSUnaryImageKernel. - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device Standard init with default properties per filter type Parameters: device The device that the filter will be used on. May not be NULL. Returns: a pointer to the newly initialized object. This will fail, returning nil if the device is not supported. Devices must be MTLFeatureSet_iOS_GPUFamily2_v1 or later. Reimplemented from MPSUnaryImageKernel. - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device(NSUInteger) kernelDiameter Initialize a filter for a particular kernel size and device Parameters: device The device the filter will run on kernelDiameter Diameter of the median filter. Must be an odd number. Returns: A valid object or nil, if failure. + (NSUInteger) maxKernelDiameter The maximum diameter in pixels of the filter window supported by the median filter. + (NSUInteger) minKernelDiameter The minimum diameter in pixels of the filter window supported by the median filter. Property Documentation - kernelDiameter [read], [nonatomic], [assign] The diameter in pixels of the filter window. The median filter is applied to a kernelDiameter x kernelDiameter window of pixels centered on the corresponding source pixel for each destination pixel. The kernel diameter must be an odd number. Author Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code. Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageMedian(3)
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MPSCNNPooling(3) MetalPerformanceShaders.framework MPSCNNPooling(3) NAME
MPSCNNPooling SYNOPSIS
#import <MPSCNNPooling.h> Inherits MPSCNNKernel. Inherited by MPSCNNDilatedPoolingMax, MPSCNNPoolingAverage, MPSCNNPoolingL2Norm, and MPSCNNPoolingMax. Instance Methods (nonnull instancetype) - initWithDevice:kernelWidth:kernelHeight: (nonnull instancetype) - initWithDevice:kernelWidth:kernelHeight:strideInPixelsX:strideInPixelsY: (nullable instancetype) - initWithCoder:device: (nonnull instancetype) - initWithDevice: Additional Inherited Members Detailed Description This depends on Metal.framework Pooling is a form of non-linear sub-sampling. Pooling partitions the input image into a set of rectangles (overlapping or non-overlapping) and, for each such sub-region, outputs a value. The pooling operation is used in computer vision to reduce the dimensionality of intermediate representations. Method Documentation - (nullable instancetype) initWithCoder: (NSCoder *__nonnull) aDecoder(nonnull id< MTLDevice >) device NSSecureCoding compatability See MPSKernel::initWithCoder. Parameters: aDecoder The NSCoder subclass with your serialized MPSCNNPooling device The MTLDevice on which to make the MPSCNNPooling Returns: A new MPSCNNPooling object, or nil if failure. Reimplemented from MPSCNNKernel. Reimplemented in MPSCNNDilatedPoolingMax, MPSCNNPoolingAverage, MPSCNNPoolingL2Norm, and MPSCNNPoolingMax. - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device Standard init with default properties per filter type Parameters: device The device that the filter will be used on. May not be NULL. Returns: A pointer to the newly initialized object. This will fail, returning nil if the device is not supported. Devices must be MTLFeatureSet_iOS_GPUFamily2_v1 or later. Reimplemented from MPSCNNKernel. - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device(NSUInteger) kernelWidth(NSUInteger) kernelHeight Initialize a pooling filter Parameters: device The device the filter will run on kernelWidth The width of the kernel. Can be an odd or even value. kernelHeight The height of the kernel. Can be an odd or even value. Returns: A valid MPSCNNPooling object or nil, if failure. - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device(NSUInteger) kernelWidth(NSUInteger) kernelHeight(NSUInteger) strideInPixelsX(NSUInteger) strideInPixelsY Initialize a pooling filter Parameters: device The device the filter will run on kernelWidth The width of the kernel. Can be an odd or even value. kernelHeight The height of the kernel. Can be an odd or even value. strideInPixelsX The output stride (downsampling factor) in the x dimension. strideInPixelsY The output stride (downsampling factor) in the y dimension. Returns: A valid MPSCNNPooling object or nil, if failure. Reimplemented in MPSCNNPoolingAverage, MPSCNNPoolingL2Norm, and MPSCNNPoolingMax. Author Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code. Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSCNNPooling(3)