LBPPyrDotFeatures.h

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2010 Vojtech Franc, Soeren Sonnenburg
 * Written (W) 2013 Evangelos Anagnostopoulos
 * Copyright (C) 2010 Vojtech Franc, xfrancv@cmp.felk.cvut.cz
 * Copyright (C) 2010 Berlin Institute of Technology
 */
#ifndef _LBP_PYR_DOTFEATURES__H__
#define _LBP_PYR_DOTFEATURES__H__

#include <shogun/lib/config.h>

#include <shogun/lib/common.h>
#include <shogun/features/DotFeatures.h>
#include <shogun/features/DenseFeatures.h>

namespace shogun
{
class CLBPPyrDotFeatures : public CDotFeatures
{
    public:
        CLBPPyrDotFeatures();

        CLBPPyrDotFeatures(CDenseFeatures<uint32_t>* image_set, int32_t image_w, int32_t image_h,
            uint16_t num_pyramids);

        virtual ~CLBPPyrDotFeatures();

        CLBPPyrDotFeatures(const CLBPPyrDotFeatures & orig);

        virtual int32_t get_dim_feature_space() const;

        virtual int32_t get_nnz_features_for_vector(int32_t num);

        virtual EFeatureType get_feature_type() const;

        virtual EFeatureClass get_feature_class() const;

        virtual int32_t get_num_vectors() const;

        virtual float64_t dot(int32_t vec_idx1, CDotFeatures* df, int32_t vec_idx2);

        virtual void* get_feature_iterator(int32_t vector_index);

        virtual bool get_next_feature(int32_t& index, float64_t& value, void* iterator);

        virtual void free_feature_iterator(void* iterator);

        CFeatures* duplicate() const;

        virtual const char* get_name() const { return "LBPPyrDotFeatures"; }

        virtual float64_t dense_dot(int32_t vec_idx1, const float64_t* vec2, int32_t vec2_len);

        virtual void add_to_dense_vec(float64_t alpha, int32_t vec_idx1,
                float64_t* vec2, int32_t vec2_len, bool abs_val=false);

        uint32_t* get_image(int32_t index, int32_t& width, int32_t& height);

        SGVector<char> get_transformed_image(int32_t index);
    protected:

        uint32_t liblbp_pyr_get_dim(uint16_t nPyramids);

        uint8_t create_lbp_pattern(uint32_t* img, int32_t x, int32_t y);

    private:

        void init(CDenseFeatures<uint32_t>* image_set, int32_t image_w,
                int32_t image_h);

    protected:
        CDenseFeatures<uint32_t>* images;

        int32_t image_width;

        int32_t image_height;

        int32_t vec_nDim;
};
}
#endif /* _LBP_PYR_DOTFEATURES__H__  */