Laplacian Image Pyramid

Detailed Description

Computes a Laplacian Image Pyramid from an input image.

This vision function creates the Laplacian image pyramid from the input image. First, a Gaussian pyramid with VX_SCALE_PYRAMID_HALF is created. Then, for each level \(i\), the corresponding image \(I_i\) is blurred with Gaussian 5x5 filter, and the difference between the two images is the corresponding level \(L_i\) of the Laplacian pyramid:

\[ L_i = I_i - Gaussian5x5(I_i). \]

Level 0 shall always have the same resolution as the input image.

Functions
vx_node VX_API_CALL	vxLaplacianPyramidNode (vx_graph graph, vx_image input, vx_pyramid laplacian, vx_image output)
	[Graph] Creates a node for a Laplacian Image Pyramid. More...
vx_status VX_API_CALL	vxuLaplacianPyramid (vx_context context, vx_image input, vx_pyramid laplacian, vx_image output)
	[Immediate] Computes a Laplacian pyramid from an input image. More...

Function Documentation

vx_node VX_API_CALL vxLaplacianPyramidNode	(	vx_graph	graph,
		vx_image	input,
		vx_pyramid	laplacian,
		vx_image	output
	)

[Graph] Creates a node for a Laplacian Image Pyramid.

Parameters

[in]	graph	The reference to the graph.
[in]	input	The input image in VX_DF_IMAGE_U8 format.
[out]	laplacian	The Laplacian pyramid with VX_DF_IMAGE_S16 to construct.
[out]	output	The lowest resolution image of type VX_DF_IMAGE_S16 necessary to reconstruct the input image from the pyramid.

See Also

Object: Pyramid

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 vxuLaplacianPyramid	(	vx_context	context,
		vx_image	input,
		vx_pyramid	laplacian,
		vx_image	output
	)

[Immediate] Computes a Laplacian pyramid from an input image.

Parameters

[in]	context	The reference to the overall context.
[in]	input	The input image in VX_DF_IMAGE_U8 format.
[out]	laplacian	The Laplacian pyramid with VX_DF_IMAGE_S16 to construct.
[out]	output	The lowest resolution image of type VX_DF_IMAGE_S16 necessary to reconstruct the input image from the pyramid.

See Also

Object: Pyramid

Returns

A vx_status enumeration.

Return values

VX_SUCCESS	Success.
*	An error occured. See vx_status_e