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 [R00072]. 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 [R00073]:

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

Level 0 shall always have the same resolution as the input image [R00074].

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...

Function Documentation

vxLaplacianPyramidNode()

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 [R00256].
[in]	input	The input image in VX_DF_IMAGE_U8 format [R00257].
[out]	laplacian	The Laplacian pyramid with VX_DF_IMAGE_S16 to construct [R00258].
[out]	output	The lowest resolution image of type VX_DF_IMAGE_S16 necessary to reconstruct the input image from the pyramid [R00259].

See also

Object: Pyramid

Returns

vx_node [R00260].

Return values

vx_node

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