NICE_VisLearning/features/localfeatures/LFReadCache.h

/** 
* @file LFReadCache.h
* @brief read local features from file
* @author Erik Rodner, Alexander Freytag
* @date 02/14/2008

*/
#ifndef LFReadCacheINCLUDE
#define LFReadCacheINCLUDE

#include "core/vector/VectorT.h"
#include "core/vector/MatrixT.h"
#include "core/image/ImageT.h"
 
#include "LocalFeatureRepresentation.h"
#include "LFSiftPP.h"
#include "core/basics/Config.h"


namespace OBJREC {

  /** @class LFReadCache
  * @brief Read local features from file
  *
  */   
  class LFReadCache : public LocalFeatureRepresentation
  {

      protected:
      int   numFeatures;
      const LocalFeatureRepresentation *lfrep;
      std::string cachedir;

      int descFormat;
      int cachemode;

      template <class ImageClass>
      int extractFeaturesTemplate ( const ImageClass & img, 
            NICE::VVector & features, 
            NICE::VVector & positions) const;

      public:
    
    /** standard constructor 
    * @param conf Configuration
    * @param lfrep a LocalFeatureRepresentation (i.e. LFColorSande)
    * @param _numfeatures how many features should be returned (-1 for all)
    * @param _section specify the block in the config object we read 
    */
    LFReadCache( const NICE::Config *conf, 
          const LocalFeatureRepresentation *lfrep,
          int _numFeatures = -1,
          const std::string & _section = "cache"          
               );
        
    /** simple destructor */
    virtual ~LFReadCache();

    int getDescSize () const;

    /**
    * extract features for gray images
    * @param img input image
    * @param features output features
    * @param positions position of the features
    * @return 
    */
    int extractFeatures ( const NICE::Image & img, 
              NICE::VVector & features, 
              NICE::VVector & positions ) const;
    
    /**
    * extract features for color images
    * @param img input image
    * @param features output features
    * @param positions position of the features
    * @return 
    */
    int extractFeatures ( const NICE::ColorImage & img, 
              NICE::VVector & features, 
              NICE::VVector & positions ) const;

    void visualize ( NICE::Image & img, 
      const NICE::Vector & feature ) const;

    void visualizeFeatures ( NICE::Image & mark,
          const NICE::VVector & positions,
          size_t color ) const;
  };

} // namespace

#include "LFReadCache.tcc"


#endif