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-Wed Jul 20 2016 MPSImageErode(3)
Mac OS X 10.12.3 - Generated Tue Feb 7 07:50:39 CST 2017