MPSImageErode(3) MetalPerformanceShaders.framework MPSImageErode(3)
NAME
MPSImageErode
SYNOPSIS
#import <MPSImageMorphology.h>
Inherits MPSImageDilate.
Additional Inherited Members
Detailed Description
The MPSImageErode filter finds the minimum pixel value in a rectangular region centered around each pixel in the source image. It is like
the MPSImageAreaMin, except that the intensity at each position is calculated relative to a different value before determining which is the
maximum pixel value, allowing for shaped, non-rectangular morphological probes.
for each pixel in the filter window:
value = pixel[filterY][filterX] + filter[filterY*filter_width+filterX]
if( value < bestValue ){
result = value
bestValue = value;
}
A filter that contains all zeros is identical to a MPSImageAreaMin filter. The center filter element is assumed to be 0, to avoid causing
a general lightening of the image.
The definition of the filter for MPSImageErode is different from vImage. (MPSErode_filter_value = 1.0f-vImageErode_filter_value.) This
allows MPSImageDilate and MPSImageErode to use the same filter, making open and close operators easier to write. The edgeMode property is
assumed to always be MPSImageEdgeModeClamp for this filter.
Author
Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code.
Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageErode(3)
