StrongClassifier.h

#ifndef STRONG_CLASSIFIER_HEADER
#define STRONG_CLASSIFIER_HEADER

#include "ClassifierSelector.h"

class StrongClassifier {
public:
    StrongClassifier(int numSelector, int numWeakClassifier, 
        const Size &patchSize, bool useFeatureReplace = false, int numBackup = 0);
    virtual ~StrongClassifier();

    virtual float Evaluate(const IntegralImage *intImage, const Rect &roi) const;

    virtual void Initialize(const Size &patchSize);

    virtual bool Update(const IntegralImage *intImage, const Rect &roi, 
        int target, float importance = 1.0f);

protected:
    int numSelector;
    int totalWeakClassifiers;

    ClassifierSelector **selectors;

    Size patchSize;

    // The weight of each selector.
    float *alpha;

    // Whether we replace the weakest classifier in trainging.
    bool useFeatureReplace;

    inline void NormalizeAlpha() {
        float sum = 0.0f;
        for (int i = 0; i < numSelector; i++) {
            sum += alpha[i];
        }
        float invSum = 1.0f / sum;
        for (int i = 0; i < numSelector; i++) {
            alpha[i] *= invSum;
        }
    }

};


#endif