Kernel: Laplacian Filter

Computes a Laplacian filter over a window of the input image. More...

Functions
vx_node	vxLaplacian3x3Node (vx_graph graph, vx_image input, vx_image output)
	[Graph] Creates a Laplacian Filter Node.
vx_status	vxuLaplacian3x3 (vx_context context, vx_image input, vx_image output)
	[Immediate] Computes a laplacian filter on the image by a 3x3 window.
vx_node	vxScharr3x3Node (vx_graph graph, vx_image input, vx_image output1, vx_image output2)
	[Graph] Creates a Scharr Filter Node.
vx_status	vxuScharr3x3 (vx_context context, vx_image input, vx_image output1, vx_image output2)
	[Immediate] Computes a Scharr filter on the image by a 3x3 window.

Detailed Description

Computes a Laplacian filter over a window of the input image.

This filter uses the follow convolution matrix:

\[\mathbf{K}_{gaussian} = \begin{vmatrix} 1 & 1 & 1\\ 1 &-8 & 1\\ 1 & 1 & 1 \end{vmatrix} * \frac{1}{1} \]

Function Documentation

vxLaplacian3x3Node()

vx_node vxLaplacian3x3Node	(	vx_graph	graph,
		vx_image	input,
		vx_image	output )

#include <vx_lib_extras.h>

[Graph] Creates a Laplacian Filter Node.

Parameters

[in]	graph	The handle to the graph.
[in]	input	The input image in VX_DF_IMAGE_U8 format.
[out]	output	The output image in VX_DF_IMAGE_U8 format.

vxScharr3x3Node()

vx_node vxScharr3x3Node	(	vx_graph	graph,
		vx_image	input,
		vx_image	output1,
		vx_image	output2 )

#include <vx_lib_extras.h>

[Graph] Creates a Scharr Filter Node.

Parameters

[in]	graph	The handle to the graph.
[in]	input	The input image in VX_DF_IMAGE_U8 format.
[out]	output1	The VX_DF_IMAGE_S16 output gradient x image.
[out]	output2	The VX_DF_IMAGE_S16 output gradient y image.

vxuLaplacian3x3()

vx_status vxuLaplacian3x3	(	vx_context	context,
		vx_image	input,
		vx_image	output )

#include <vx_lib_extras.h>

[Immediate] Computes a laplacian filter on the image by a 3x3 window.

Parameters

[in]	context	The handle to the context.
[in]	input	The input image in VX_DF_IMAGE_U8 format.
[out]	output	The output image in VX_DF_IMAGE_U8 format.

vxuScharr3x3()

vx_status vxuScharr3x3	(	vx_context	context,
		vx_image	input,
		vx_image	output1,
		vx_image	output2 )

#include <vx_lib_extras.h>

[Immediate] Computes a Scharr filter on the image by a 3x3 window.

Parameters

[in]	context	The handle to the context.
[in]	input	The input image in VX_DF_IMAGE_U8 format.
[out]	output1	The VX_DF_IMAGE_S16 output gradient x image.
[out]	output2	The VX_DF_IMAGE_S16 output gradient y image.