Sobel 3x3

Detailed Description

Implements the Sobel Image Filter Kernel. The output images dimensions should be the same as the dimensions of the input image.

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 VX_API_CALL	vxSobel3x3Node (vx_graph graph, vx_image input, vx_image output_x, vx_image output_y)
	[Graph] Creates a Sobel3x3 node. More...
vx_status VX_API_CALL	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 VX_API_CALL 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. Must have the same dimensions as the input image.
[out]	output_y	[optional] The output gradient in the y direction in VX_DF_IMAGE_S16. Must have the same dimensions as the input image.

See also

VX_KERNEL_SOBEL_3x3

Returns

vx_node.

Return values

vx_node

A node reference. Any possible errors preventing a successful creation should be checked using vxGetStatus

vx_status VX_API_CALL 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.