LZF_OPTIMIZED_FOR(3) 1 LZF_OPTIMIZED_FOR(3)lzf_optimized_for - Determines what LZF extension was optimized forSYNOPSIS
int lzf_optimized_for (void )
DESCRIPTION
Determines what was LZF extension optimized for during compilation.
RETURN VALUES
Returns 1 if LZF was optimized for speed, 0 for compression.
PHP Documentation Group LZF_OPTIMIZED_FOR(3)
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MPSImageLaplacian(3) MetalPerformanceShaders.framework MPSImageLaplacian(3)NAME
MPSImageLaplacian
SYNOPSIS
#import <MPSImageConvolution.h>
Inherits MPSUnaryImageKernel.
Properties
float bias
Additional Inherited Members
Detailed Description
The MPSImageLaplacian is an optimized variant of the MPSImageConvolution filter provided primarily for ease of use. This filter uses an
optimized convolution filter with a 3 x 3 kernel with the following weights: [ 0 1 0 1 -4 1 0 1 0 ]
The optimized convolution filter used by MPSImageLaplacian can also be used by creating a MPSImageConvolution object with kernelWidth = 3,
kernelHeight = 3 and weights as specified above.
Property Documentation
- bias [read], [write], [nonatomic], [assign]
The bias is a value to be added to convolved pixel before it is converted back to the storage format. It can be used to convert negative
values into a representable range for a unsigned MTLPixelFormat. For example, many edge detection filters produce results in the range
[-k,k]. By scaling the filter weights by 0.5/k and adding 0.5, the results will be in range [0,1] suitable for use with unorm formats. It
can be used in combination with renormalization of the filter weights to do video ranging as part of the convolution effect. It can also
just be used to increase the brightness of the image.
Default value is 0.0f.
Author
Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code.
Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageLaplacian(3)
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