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/*
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copy or use the software.


                          License Agreement
               For Open Source Computer Vision Library
                       (3-clause BSD License)

Copyright (C) 2000-2015, Intel Corporation, all rights reserved.
Copyright (C) 2009-2011, Willow Garage Inc., all rights reserved.
Copyright (C) 2009-2015, NVIDIA Corporation, all rights reserved.
Copyright (C) 2010-2013, Advanced Micro Devices, Inc., all rights reserved.
Copyright (C) 2015, OpenCV Foundation, all rights reserved.
Copyright (C) 2015, Itseez Inc., all rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

  * Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.

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  * Neither the names of the copyright holders nor the names of the contributors
    may be used to endorse or promote products derived from this software
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*/

#ifndef __OPENCV_BIF_HPP__
#define __OPENCV_BIF_HPP__

#include "opencv2/core.hpp"

namespace cv {
namespace face {

/** Implementation of bio-inspired features (BIF) from the paper:
 *  Guo, Guodong, et al. "Human age estimation using bio-inspired features."
 *  Computer Vision and Pattern Recognition, 2009. CVPR 2009.
 */
class CV_EXPORTS_W BIF : public Algorithm {
public:
    /** @returns The number of filter bands used for computing BIF. */
    CV_WRAP virtual int getNumBands() const = 0;

    /** @returns The number of image rotations. */
    CV_WRAP virtual int getNumRotations() const = 0;

    /** Computes features sby input image.
     *  @param image Input image (CV_32FC1).
     *  @param features Feature vector (CV_32FC1).
     */
    CV_WRAP virtual void compute(InputArray image,
                                 OutputArray features) const = 0;
};

/**
 * @param num_bands The number of filter bands (<=8) used for computing BIF.
 * @param num_rotations The number of image rotations for computing BIF.
 * @returns Object for computing BIF.
 */
CV_EXPORTS_W cv::Ptr<BIF> createBIF(int num_bands = 8, int num_rotations = 12);

}  // namespace cv
}  // namespace face

#endif  // #ifndef __OPENCV_FACEREC_HPP__