MPSImageHistogramInfo(3)				 MetalPerformanceShaders.framework				  MPSImageHistogramInfo(3)

NAME

       MPSImageHistogramInfo - Specifies information to compute the histogram for channels of an image.

SYNOPSIS

       #include <MPSImageHistogram.h>

   Public Attributes
       NSUInteger numberOfHistogramEntries
       BOOL histogramForAlpha
       vector_float4 minPixelValue
       vector_float4 maxPixelValue

Detailed Description
       Specifies information to compute the histogram for channels of an image.

       MPSImageHistogram.h  MetalPerformanceShaders.framework

       Copyright:
	   Copyright (c) 2015 Apple Inc. All rights reserved.  MetalPerformanceShaders histogram filters

Member Data Documentation
   BOOL MPSImageHistogramInfo::histogramForAlpha
       Specifies whether the histogram for the alpha channel should be computed or not.

   vector_float4 MPSImageHistogramInfo::maxPixelValue
       Specifies the maximum pixel value. Any pixel value greater than this will be clipped to this value (for the purposes of histogram
       calculation), and assigned to the last histogram entry. This maximum value is applied to each of the four channels separately.

   vector_float4 MPSImageHistogramInfo::minPixelValue
       Specifies the minimum pixel value. Any pixel value less than this will be clipped to this value (for the purposes of histogram
       calculation), and assigned to the first histogram entry. This minimum value is applied to each of the four channels separately.

   NSUInteger MPSImageHistogramInfo::numberOfHistogramEntries
       Specifies the number of histogram entries, or 'bins' for each channel. For example, if you want 256 histogram bins then
       numberOfHistogramEntries must be set to 256. The value stored in each histogram bin is a 32-bit unsigned integer. The size of the histogram
       buffer in which these bins will be stored should be >= numberOfHistogramEntries * sizeof(uint32_t) * number of channels in the image.
       numberOfHistogramEntries must be a power of 2 and is a minimum of 256 bins.

Author
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Version MetalPerformanceShaders-100				  Thu Feb 8 2018					  MPSImageHistogramInfo(3)