Developer Reference

  • 2020
  • 10/21/2020
  • Public Content
Contents

OpticalFlowPyrLKGetSize

Computes the size of the pyramidal optical flow state structure.

Syntax

IppStatus ippiOpticalFlowPyrLKGetSize(int
winSize
, IppiSize
roiSize
, IppDataType
dataType
, IppHintAlgorithm
hint
, int*
pStateSize
);
Include Files
ippcv.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
,
ipps.h
,
ippi.h
Libraries:
ippcore.lib
,
ippvm.lib
,
ipps.lib
,
ippi.lib
Parameters
winSize
Size of the search window of each pyramid level.
roiSize
Maximal size of the source image (zero level of the pyramid) ROI, in pixels.
dataType
Data type of the image. Possible values:
ipp8u
,
ipp16u
, or
ipp32f
.
hint
Option to select the algorithmic implementation of the transform function.
pStateSize
Pointer to the size of the state struture.
Description
This function operates with ROI (see Regions of Interest in Intel IPP).
This function computes the size of the
pState
structure that is required to calculate the optical flow between two images in the centered window of size
winSize
*
winSize
using the pyramidal Lucas-Kanade [Bou99] algorithm. The
hint
argument specifies the computation algorithm. The
pState
structure is used by the
ippiOpticalFlowPyrLK
function and can be applied to process images with size not greater than
roiSize
.
Return Values
ippStsNoErr
Indicates no error. Any other value indicates an error or a warning.
ippStsNullPtrErr
Indicates an error when
pStateSize
is
NULL
.
ippStsDataTypeErr
Indicates an error when
dataType
has an illegal value.
ippStsSizeErr
Indicates an error when
roiSize
has a field with a zero or negative value; or when
winSize
is less than, or equal to zero.

Product and Performance Information

1

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Notice revision #20110804