rtflann::HammingLUT Struct Reference

#include <dist.h>

List of all members.

Public Types
typedef unsigned char	ElementType
typedef int	ResultType
Public Member Functions
ResultType	operator() (const unsigned char *a, const unsigned char *b, int size) const
Static Public Member Functions
static unsigned char	byteBitsLookUp (unsigned char b)
	given a byte, count the bits using a look up table

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Detailed Description

Hamming distance functor - counts the bit differences between two strings - useful for the Brief descriptor bit count of A exclusive XOR'ed with B

Definition at line 372 of file dist.h.

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Member Typedef Documentation

typedef unsigned char rtflann::HammingLUT::ElementType

Definition at line 374 of file dist.h.

typedef int rtflann::HammingLUT::ResultType

Definition at line 375 of file dist.h.

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Member Function Documentation

static unsigned char rtflann::HammingLUT::byteBitsLookUp

(

unsigned char

b

)

[inline, static]

given a byte, count the bits using a look up table

Parameters:

b	the byte to count bits. The look up table has an entry for all values of b, where that entry is the number of bits.

Returns:

the number of bits in byte b

Definition at line 394 of file dist.h.

ResultType rtflann::HammingLUT::operator()	(	const unsigned char *	a,
		const unsigned char *	b,
		int	size
	)		const [inline]

this will count the bits in a ^ b

Definition at line 379 of file dist.h.

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The documentation for this struct was generated from the following file:

• dist.h