text: /*ckwg +29
   * Copyright 2014 by Kitware, Inc.
   * All rights reserved.
   *
   * 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.
   *
   *  * Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   *
   *  * Neither name of Kitware, Inc. nor the names of any contributors may be used
   *    to endorse or promote products derived from this software without specific
   *    prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <maptk/viscl/extract_descriptors.h>
  #include <maptk/viscl/image_container.h>
  #include <maptk/viscl/feature_set.h>
  #include <maptk/viscl/descriptor_set.h>
  
  #include <viscl/tasks/BRIEF.h>
  
  namespace maptk
  {
  
  namespace vcl
  {
  
  /// Private implementation class
  class extract_descriptors::priv
  {
  public:
    /// Constructor
    priv()
    {
    }
  
    /// Copy constructor
    priv(const priv& other)
    {
    }
  
    viscl::brief<10> brief;
  };
  
  
  /// Constructor
  extract_descriptors
  ::extract_descriptors()
  : d_(new priv)
  {
  }
  
  
  /// Copy Constructor
  extract_descriptors
  ::extract_descriptors(const extract_descriptors& other)
  : d_(new priv(*other.d_))
  {
  }
  
  
  /// Destructor
  extract_descriptors
  ::~extract_descriptors()
  {
  }
  
  
  /// Extract from the image a descriptor corresoponding to each feature
  descriptor_set_sptr
  extract_descriptors
  ::extract(image_container_sptr image_data,
            feature_set_sptr features) const
  {
    if( !image_data || !features )
    {
      return descriptor_set_sptr();
    }
  
    viscl::image img = vcl::image_container_to_viscl(*image_data);
    vcl::feature_set::type fs = vcl::features_to_viscl(*features);
    viscl::buffer descriptors;
    d_->brief.compute_descriptors(img, fs.features_, features->size(), descriptors);
    return descriptor_set_sptr(new vcl::descriptor_set(descriptors));
  }
  
  
  } // end namespace vcl
  
  } // end namespace maptk
  