sift.hpp File Reference

#include <vector>
#include <ostream>
#include <cmath>
#include <limits>
#include "Shared/attributes.h"
#include "sift.ipp"
#include <iostream>
#include <cassert>

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Classes
struct	VL::Exception
	Generic exception. More...
struct	VL::PgmBuffer
	PGM buffer descriptor. More...
class	VL::Sift
	SIFT filter. More...
struct	VL::Sift::Keypoint
	SIFT keypoint. More...
Namespaces
namespace	VL
	VisionLab namespace.
Defines
#define	VL_FASTFLOAT   float
#define	VL_XEAS(x)   #x
#define	VL_EXPAND_AND_STRINGIFY(x)   VL_XEAS(x)
#define	VL_THROW(x)
	Throw generic exception.
Typedefs
typedef float	VL::pixel_t
	Pixel data type.
typedef VL_FASTFLOAT	VL::float_t
	Floating point data type.
typedef float	VL::float32_t
	32-bit floating data type
typedef double	VL::float64_t
	64-bit floating data type
typedef int	VL::int32_t
	32-bit integer data type
typedef int	VL::uint32_t
	64-bit integer data type
typedef char unsigned	VL::uint8_t
	8-bit unsigned integer data type
Functions
Fast math
We provide approximate mathematical functions. These are usually rather faster than the corresponding standard library functions.
float	VL::fast_resqrt (float x)
	Fast resqrt.
double	VL::fast_resqrt (double x)
	Fast resqrt.
float_t	VL::fast_expn (VL::float_t x)
	Fast @ exp(-x).
float_t	VL::fast_abs (VL::float_t x)
	Fast abs(x).
float_t	VL::fast_mod_2pi (VL::float_t x)
	Fast mod(x,2pi).
float_t	VL::fast_atan2 (VL::float_t y, VL::float_t x)
	Fast atan2.
float_t	VL::fast_sqrt (VL::float_t x)
	Fast sqrt.
int32_t	VL::fast_floor (VL::float_t x)
	Fast (int) floor(x).
PGM input/output
std::ostream &	VL::insertPgm (std::ostream &os, pixel_t const *im, int width, int height)
	Insert PGM file into stream.
std::istream &	VL::extractPgm (std::istream &in, PgmBuffer &buffer)
	Extract PGM file from stream.
void	VL::createPgmBufferFromArray (int w, int h, pixel_t *d, PgmBuffer &buffer)

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Define Documentation

#define VL_EXPAND_AND_STRINGIFY

(

x

)

VL_XEAS(x)

Definition at line 64 of file sift.hpp.

Referenced by siftdriver().

#define VL_FASTFLOAT   float

Definition at line 60 of file sift.hpp.

Referenced by siftdriver().

#define VL_THROW

(

x

)

Value:

{                                             \
    std::ostringstream oss ;                    \
    oss << x ;                                  \
    throw VL::Exception(oss.str()) ;            \
  }

Throw generic exception.

The macro executes the stream operations x to obtain an error messages. The message is then wrapped in a generic exception VL::Exception and thrown.

Parameters:

x

sequence of stream operations.

Definition at line 139 of file sift.hpp.

Referenced by siftdriver().

#define VL_XEAS

(

x

)

#x

Definition at line 63 of file sift.hpp.