Include Files

Domain Dependencies

Headers:

ippcore.h

,

ippvm.h

,

ipps.h

,

ippi.h

Libraries:

ippcore.lib

,

ippvm.lib

,

ipps.lib

,

ippi.lib

Description

This function initializes the structure for pyramid with (

level

+1) levels. This structure is used by the

ippiOpticalFlowPyrLK

function for optical flow calculation. The

IppiPyramid

structure contains the following fields:

pImage

Pointer to the array of

(level+1)

layer images.

pStep

Pointer to the array of

(level+1)

image row step values.

pRoi

Pointer to the array of

(level+1)

layer image ROIs.

pRate

Pointer to the array of

(level+1)

ratios of

i

-th levels to the zero level (

rate

-i

).

pState

Pointer to the structure to compute the next pyramid layer.

level

Number of levels in the pyramid.

The

ippiPyramidInit

function fills the

pRoi

and

pRate

arrays and the

level

field. The value of the

level

field is equal to the minimum of the input value of the

level

parameter and the maximum possible number of layers of the pyramid with given

rate

and zero level size.

You need to specify other fields. To initialize the pyramid layer structure

pState

, use the

ippiPyramidLayerDownInit

or

ippiPyramidLayerUpInit

functions. To obtain the pyramid layer images, you can use the

ippiPyramidLayerDown

and

ippiPyramidLayerUp

functions.

For an example on how to use this function, refer to the example provided with the

ippiPyramidLayerDown

function description.