TiltHaarFeatures

Modifies a Haar classifier by tilting specified features.

Syntax

IppStatus ippiTiltHaarFeatures_32f(const Ipp8u* pMask, int flag, IppiHaarClassifier_32f* pState);

IppStatus ippiTiltHaarFeatures_32s(const Ipp8u* pMask, int flag, IppiHaarClassifier_32s* pState);

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

pMask: Pointer to the mask vector.
flag: Flag to choose the direction of feature tilting.
pState: Pointer to the Haar classifier structure.

Description

This function tilts specified features of the Haar classifier. Before using this function, compute the size of the Haar classifier state structure using HaarClassifierGetSize and initialize the structure using TiltedHaarClassifierInit. Non-zero elements of previously prepared vector pMask indicates the features that are tilted. The flag parameter specifies how the features are tilted:

if flag is equal to 0, the feature is tilted around the left top corner clockwise
if flag is equal to 1, the feature is tilted around the bottom left corner counter-clockwise

This mixed classifier containing both common and tilted features can be used by the function ippiApplyMixedHaarClassifier.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when one of the specified pointers is `NULL`.
ippStsBadArgErr	Indicates an error when the classifier is tilted already.