Allocates memory and initializes the structure for tilted Haar classifiers.
Syntax
IppStatus ippiTiltedHaarClassifierInitAlloc_32f(IppiHaarClassifier_32f** pState, const IppiRect* pFeature, const Ipp32f* pWeight, const Ipp32f* pThreshold, const Ipp32f* pVal1, const Ipp32f* pVal2, const int* pNum, int length);
IppStatus ippiTiltedHaarClassifierInitAlloc_32s(IppiHaarClassifier_32s** pState, const IppiRect* pFeature, const Ipp32s* pWeight, const Ipp32s* pThreshold, const Ipp32s* pVal1, const Ipp32s* pVal2, const int* pNum, int length);
Parameters
- ppState
- Pointer to the pointer to the Haar classifier structure.
- pFeature
- Pointer to the array of features.
- pWeight
- Pointer to the array of feature weights.
- pThreshold
- Pointer to the array of classifier threshold values.
- pVal1, pVal2
- Pointers to the arrays of classifier result values.
- pNum
- Pointer to the array of classifier lengths.
- length
- Number of classifiers in the stage.
Description
The function ippiHaarClassifierInitAlloc is
declared in the ippcv.h file. This function allocates
memory and initializes the structure for the sequence of Haar classifiers
- classification stage. t-th classifier
in the stage has pNum[i] rectangular features. Each feature
is defined by the certain rectangle with sides tilted by 45 degrees.
The points with minimum and maximum row numbers should be specified.
The length of vectors pFeature,
pWeight, pThreshold,
pVal1, and pVal2 is
equal to:
Result of applying classifiers to the image are computed using the the formula.
All features of the classifier initialized by the function ippiHaarClassifierInitAlloc have tilted sides (right part of Figure “Representing Haar Features”).
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error condition if one of the specified pointer is NULL. |
ippStsSizeErr |
Indicates an error condition if length or one of pNum[i] is less than or equal to 0; or if the sum of all elements of pNum is not equal to length. |
ippStsBadArgErr |
Indicates an error condition if one of features is defined incorrectly. |
ippStsMemAllocErr |
Memory allocation error |