added BruteForceMatcher (the older variant of BFMatcher) to legacy (ticket #1796). added test for it. Renamed legacy tests to "Legacy_*"

modules/features2d/include/opencv2/features2d/features2d.hpp

@@ -737,94 +737,6 @@ protected:
     PixelTestFn test_fn_;
 };
 
-/****************************************************************************************\
-*                                          Distance                                      *
-\****************************************************************************************/
-template<typename T>
-struct CV_EXPORTS Accumulator
-{
-    typedef T Type;
-};
-
-template<> struct Accumulator<unsigned char>  { typedef float Type; };
-template<> struct Accumulator<unsigned short> { typedef float Type; };
-template<> struct Accumulator<char>   { typedef float Type; };
-template<> struct Accumulator<short>  { typedef float Type; };
-
-/*
- * Squared Euclidean distance functor
- */
-template<class T>
-struct CV_EXPORTS SL2
-{
-    typedef T ValueType;
-    typedef typename Accumulator<T>::Type ResultType;
-
-    ResultType operator()( const T* a, const T* b, int size ) const
-    {
-        return normL2Sqr<ValueType, ResultType>(a, b, size);
-    }
-};
-
-/*
- * Euclidean distance functor
- */
-template<class T>
-struct CV_EXPORTS L2
-{
-    typedef T ValueType;
-    typedef typename Accumulator<T>::Type ResultType;
-
-    ResultType operator()( const T* a, const T* b, int size ) const
-    {
-        return (ResultType)sqrt((double)normL2Sqr<ValueType, ResultType>(a, b, size));
-    }
-};
-
-/*
- * Manhattan distance (city block distance) functor
- */
-template<class T>
-struct CV_EXPORTS L1
-{
-    typedef T ValueType;
-    typedef typename Accumulator<T>::Type ResultType;
-
-    ResultType operator()( const T* a, const T* b, int size ) const
-    {
-        return normL1<ValueType, ResultType>(a, b, size);
-    }
-};
-
-/*
- * Hamming distance functor - counts the bit differences between two strings - useful for the Brief descriptor
- * bit count of A exclusive XOR'ed with B
- */
-struct CV_EXPORTS Hamming
-{
-    typedef unsigned char ValueType;
-    typedef int ResultType;
-
-    /** this will count the bits in a ^ b
-     */
-    ResultType operator()( const unsigned char* a, const unsigned char* b, int size ) const
-    {
-        return normHamming(a, b, size);
-    }
-};
-
-typedef Hamming HammingLUT;
-
-template<int cellsize> struct CV_EXPORTS HammingMultilevel
-{
-    typedef unsigned char ValueType;
-    typedef int ResultType;
-    
-    ResultType operator()( const unsigned char* a, const unsigned char* b, int size ) const
-    {
-        return normHamming(a, b, size, cellsize);
-    }
-};
     
 /****************************************************************************************\
 *                                      DMatch                                            *