MPSImageIntegralOfSquares(3) MetalPerformanceShaders.framework MPSImageIntegralOfSquares(3)NAME
MPSImageIntegralOfSquares
SYNOPSIS
#import <MPSImageIntegral.h>
Inherits MPSUnaryImageKernel.
Additional Inherited Members
Detailed Description
The MPSImageIntegralOfSquares calculates the sum of squared pixels over a specified region in the image. The value at each position is the
sum of all squared pixels in a source image rectangle, sumRect:
sumRect.origin = MPSUnaryImageKernel.offset
sumRect.size = dest_position - MPSUnaryImageKernel.clipRect.origin
If the channels in the source image are normalized, half-float or floating values, the destination image is recommended to be a 32-bit
floating-point image. If the channels in the source image are integer values, it is recommended that an appropriate 32-bit integer image
destination format is used.
This kernel accepts uint and int textures in addition to unorm and floating-point textures.
Author
Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code.
Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageIntegralOfSquares(3)
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MPSImageStatisticsMeanAndVariance(3) MetalPerformanceShaders.framework MPSImageStatisticsMeanAndVariance(3)NAME
MPSImageStatisticsMeanAndVariance
SYNOPSIS
#import <MPSImageStatistics.h>
Inherits MPSUnaryImageKernel.
Instance Methods
(nonnull instancetype) - initWithDevice:
(nullable instancetype) - initWithCoder:device:
Properties
MTLRegion clipRectSource
Additional Inherited Members
Detailed Description
The MPSImageStatisticsMeanAndVariance computes the mean and variance for a given region of an image. The mean and variance values are
written to the destination image at the following pixel locations:
o mean value is written at pixel location (0, 0)
o variance value is written at pixel location (1, 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
Specifies information to apply the statistics mean operation on an image.
Parameters:
device The device the filter will run on
Returns:
A valid MPSImageStatisticsMeanAndVariance object or nil, if failure.
Reimplemented from MPSUnaryImageKernel.
Property Documentation
- clipRectSource [read], [write], [nonatomic], [assign]
The source rectangle to use when reading data. A MTLRegion that indicates which part of the source to read. If the clipRectSource does not
lie completely within the source image, the intersection of the image bounds and clipRectSource will be used. The clipRectSource replaces
the MPSUnaryImageKernel offset parameter for this filter. The latter is ignored. Default: MPSRectNoClip, use the entire source texture.
The clipRect specified in MPSUnaryImageKernel is used to control the origin in the destination texture where the mean value is written.
Author
Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code.
Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageStatisticsMeanAndVariance(3)