MPSImageTent(3) MetalPerformanceShaders.framework MPSImageTent(3)
NAME
MPSImageTent
SYNOPSIS
#import <MPSImageConvolution.h>
Inherits MPSImageBox.
Additional Inherited Members
Detailed Description
The box filter, while fast, may yield square-ish looking blur effects. However, multiple passes of the box filter tend to smooth out with
each additional pass. For example, two 3-wide box blurs produces the same effective convolution as a 5-wide tent blur:
1 1 1
1 1 1
+ 1 1 1
=================
1 2 3 2 1
Addition passes tend to approximate a gaussian line shape.
The MPSImageTent convolves an image with a tent filter. These form a tent shape with incrementally increasing sides, for example:
1 2 3 2 1
1 2 1
2 4 2
1 2 1
Like the box filter, this arrangement allows for much faster algorithms, espcially for for larger blur radii but with a more pleasing
appearance.
The tent blur is a separable filter. The implementation is aware of this and will act accordingly to give best performance for multi-
dimensional blurs.
Author
Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code.
Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageTent(3)
