Sobel 3x3

Detailed Description

Implements the Sobel Image Filter Kernel.

This kernel produces two output planes (one can be omitted) in the x and y plane. The Sobel Operators \( G_x, G_y \) are defined as:

\[ \mathbf{G}_x=\begin{vmatrix} -1 & 0 & +1\\ -2 & 0 & +2\\ -1 & 0 & +1 \end{vmatrix} , \mathbf{G}_y=\begin{vmatrix} -1 & -2 & -1 \\ 0 & 0 & 0 \\ +1 & +2 & +1 \end{vmatrix} \]

Functions
vx_node	vxSobel3x3Node (vx_graph graph, vx_image input, vx_image output_x, vx_image output_y)
	[Graph] Creates a Sobel3x3 node. More...
vx_status	vxuSobel3x3 (vx_context context, vx_image input, vx_image output_x, vx_image output_y)
	[Immediate] Invokes an immediate Sobel 3x3. More...

Function Documentation

vx_node vxSobel3x3Node	(	vx_graph	graph,
		vx_image	input,
		vx_image	output_x,
		vx_image	output_y
	)

[Graph] Creates a Sobel3x3 node.

Parameters

[in]	graph	The reference to the graph.
[in]	input	The input image in VX_DF_IMAGE_U8 format.
[out]	output_x	[optional] The output gradient in the x direction in VX_DF_IMAGE_S16.
[out]	output_y	[optional] The output gradient in the y direction in VX_DF_IMAGE_S16.

See also

VX_KERNEL_SOBEL_3x3

Returns

vx_node.

Return values

0	Node could not be created.
*	Node handle.

vx_status vxuSobel3x3	(	vx_context	context,
		vx_image	input,
		vx_image	output_x,
		vx_image	output_y
	)

[Immediate] Invokes an immediate Sobel 3x3.

Parameters

[in]	context	The reference to the overall context.
[in]	input	The input image in VX_DF_IMAGE_U8 format.
[out]	output_x	[optional] The output gradient in the x direction in VX_DF_IMAGE_S16.
[out]	output_y	[optional] The output gradient in the y direction in VX_DF_IMAGE_S16.

Returns

A vx_status_e enumeration.

Return values

VX_SUCCESS	Success
*	An error occurred. See vx_status_e.