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)

Check Out this Related Man Page

MPSImageThresholdToZero(3)				 MetalPerformanceShaders.framework				MPSImageThresholdToZero(3)

NAME

       MPSImageThresholdToZero

SYNOPSIS

       #import <MPSImageThreshold.h>

       Inherits MPSUnaryImageKernel.

   Instance Methods
       (nonnull instancetype) - initWithDevice:thresholdValue:linearGrayColorTransform:
       (nonnull instancetype) - initWithDevice:
       (nullable instancetype) - initWithCoder:device:

   Properties
       float thresholdValue
       const float * transform

   Additional Inherited Members
Detailed Description
       The MPSImageThresholdToZero filter applies a fixed-level threshold to each pixel in the image. The threshold functions convert a single
       channel image to a binary image. If the input image is not a single channel image, convert the inputimage to a single channel luminance
       image using the linearGrayColorTransform and then apply the threshold. The ThresholdToZero function is: destinationPixelValue =
       sourcePixelValue > thresholdValue ? sourcePixelValue : 0

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(float) thresholdValue(const float *__nullable) transform
       initialize a MPSImageThresholdToZero filter

       Parameters:
	   device The device the filter will run on
	   thresholdValue The threshold value to use
	   transform This matrix is an array of 3 floats. The default if no transform is specifed is BT.601/JPEG: {0.299f, 0.587f, 0.114f};

Property Documentation
   - thresholdValue [read],  [nonatomic],  [assign]
       The threshold value used to init the threshold filter

   - transform [read],	[nonatomic],  [assign]
       The color transform used to init the threshold filter

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

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

Linux and UNIX Man Pages

mpsimagemedian(3) [mojave man page]

Check Out this Related Man Page