.TH "MPSImageLaplacian" 3 "Mon Jul 9 2018" "Version MetalPerformanceShaders-119.3" "MetalPerformanceShaders.framework" \" -*- nroff -*-
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.SH NAME
MPSImageLaplacian
.SH SYNOPSIS
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.PP
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\fC#import <MPSImageConvolution\&.h>\fP
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Inherits \fBMPSUnaryImageKernel\fP\&.
.SS "Properties"

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.RI "float \fBbias\fP"
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.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
The \fBMPSImageLaplacian\fP is an optimized variant of the \fBMPSImageConvolution\fP 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 ]
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The optimized convolution filter used by \fBMPSImageLaplacian\fP can also be used by creating a \fBMPSImageConvolution\fP object with kernelWidth = 3, kernelHeight = 3 and weights as specified above\&. 
.SH "Property Documentation"
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.SS "\- bias\fC [read]\fP, \fC [write]\fP, \fC [nonatomic]\fP, \fC [assign]\fP"
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\&.
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Default value is 0\&.0f\&. 

.SH "Author"
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Generated automatically by Doxygen for MetalPerformanceShaders\&.framework from the source code\&.