The OpenVX Specification  a73e458
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...

## ◆ 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].
vx_node [R00260].
 vx_node A node reference. Any possible errors preventing a successful creation should be checked using vxGetStatus