text: #ifndef PIH_IHASH_H
  #define PIH_IHASH_H
  
  #include <vector>
  
  namespace Pih
  {
      class IHash
      {
      protected:
          unsigned int size = 8;
      public:
          IHash() {};
          virtual std::vector<unsigned char> calculateHash(const std::vector<unsigned char>& image) = 0;
      };
  }
  
  
  #endif