MPSImageMedian(3) MetalPerformanceShaders.framework MPSImageMedian(3)

MPSImageMedian

#import <MPSImageMedian.h>

Inherits MPSUnaryImageKernel.


(nonnull instancetype) - initWithDevice:kernelDiameter:
(nullable instancetype) - initWithCoder:device:
(nonnull instancetype) - initWithDevice:


(NSUInteger) + maxKernelDiameter
(NSUInteger) + minKernelDiameter


NSUInteger kernelDiameter

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.

- (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.

The maximum diameter in pixels of the filter window supported by the median filter.

The minimum diameter in pixels of the filter window supported by the median filter.

- 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.

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

Mon Jul 9 2018 Version MetalPerformanceShaders-119.3