i3dlib

Documentation

• Home
• Authors
• Download
• Documentation
• Applications

i3d::HRCA_LUT< ITYPE, OTYPE > Class Template Reference

class implements operations with LUT for unsigned numerical types (unsigned char and unsigned short) More...

#include <hrca_lut.h>

List of all members.

Public Member Functions
void	CreateAffine (float a, float b, OTYPE min=std::numeric_limits< OTYPE >::min(), OTYPE max=std::numeric_limits< OTYPE >::max())
	creates affine LUT
void	CreateLinearStretch (const HRCA_Histogram< ITYPE > &histogram)
	creates LUT for linear stretching
void	CreatePercentileStretch (const HRCA_Histogram< ITYPE > &histogram, int lp, int rp)
	creates LUT for percentile stretching,
void	CreateThresholding (ITYPE min_threshold, ITYPE max_threshold=std::numeric_limits< ITYPE >::max())
	creates LUT for thresholding
void	CreateEqualization (const HRCA_Histogram< ITYPE > &histogram)
	creates LUT for histogram equalization
void	CreateGamma (const HRCA_Histogram< ITYPE > &histogram, float gamma)
	creates LUT for gamma correction
void	Apply (const ITYPE *idata, OTYPE *odata, long size) const
	applies LUT on data
OTYPE	Get (ITYPE i) const
	get LUT value for given intensity
Protected Attributes
OTYPE *	_lut
	LUT for conversion from ITYPE to OTYPE, size of LUT is _lut_size.
const long	_lut_size
	size of LUT is equal to std::numeric_limits<ITYPE>::max() + 1

---

Detailed Description

template<class ITYPE, class OTYPE>
class i3d::HRCA_LUT< ITYPE, OTYPE >

class implements operations with LUT for unsigned numerical types (unsigned char and unsigned short)

---

Member Function Documentation

template<class ITYPE, class OTYPE>

void i3d::HRCA_LUT< ITYPE, OTYPE >::CreateAffine	(	float	a,
		float	b,
		OTYPE	min = std::numeric_limits< OTYPE >::min(),
		OTYPE	max = std::numeric_limits< OTYPE >::max()
	)

creates affine LUT

creates affine LUT, i.e. lut[i] = min_OTYPE if (a * in[i] + b) <= min_OTYPE lut[i] = max_OTYPE if (a * in[i] + b) >= max_OTYPE lut[i] = round(a * in[i] + b) otherwise where min_OTYPE and max_OTYPE are the minimal and the maximal output values. These values are implicitly set to std::numeric_limits<OTYPE>::min() and std::numeric_limits<OTYPE>::max().

Note: This function cannot be used for RGB images yet.

Parameters:

	a
	b

template<class ITYPE, class OTYPE>

void i3d::HRCA_LUT< ITYPE, OTYPE >::CreateLinearStretch

(

const HRCA_Histogram< ITYPE > &

histogram

)

creates LUT for linear stretching

computes coefficients a and b for affine transformation so that the lowest value of input histogram is mapped to 0 and the highest value is mapped to maximal value of OTYPE

Parameters:

histogram

histogram of ITYPE values, size of histogram is numeric_limits<ITYPE>::max()

template<class ITYPE, class OTYPE>

void i3d::HRCA_LUT< ITYPE, OTYPE >::CreatePercentileStretch	(	const HRCA_Histogram< ITYPE > &	histogram,
		int	lp,
		int	rp
	)

creates LUT for percentile stretching,

same as linear stretch but certain amount of leftmost and rightmost histogram values is lost. you get linear stretching for lp = rp = 0;

Parameters:

histogram

histogram of ITYPE values, size of histogram is numeric_limits<ITYPE>::max()

template<class ITYPE, class OTYPE>

void i3d::HRCA_LUT< ITYPE, OTYPE >::CreateThresholding	(	ITYPE	min_threshold,
		ITYPE	max_threshold = std::numeric_limits< ITYPE >::max()
	)

creates LUT for thresholding

Parameters:

threshold

template<class ITYPE, class OTYPE>

void i3d::HRCA_LUT< ITYPE, OTYPE >::CreateEqualization

(

const HRCA_Histogram< ITYPE > &

histogram

)

creates LUT for histogram equalization

Parameters:

histogram

histogram of ITYPE values, size of histogram is numeric_limits<ITYPE>::max()

NOT IMPLEMENTED

template<class ITYPE, class OTYPE>

void i3d::HRCA_LUT< ITYPE, OTYPE >::CreateGamma	(	const HRCA_Histogram< ITYPE > &	histogram,
		float	gamma
	)

creates LUT for gamma correction

Parameters:

	histogram
	gamma	NOT IMPLEMENTED

template<class ITYPE, class OTYPE>

void i3d::HRCA_LUT< ITYPE, OTYPE >::Apply	(	const ITYPE *	idata,
		OTYPE *	odata,
		long	size
	)			const

applies LUT on data

Parameters:

	data
	size	size of data

template<class ITYPE, class OTYPE>

OTYPE i3d::HRCA_LUT< ITYPE, OTYPE >::Get

(

ITYPE

i

)

const [inline]

get LUT value for given intensity

Parameters:

i

---

The documentation for this class was generated from the following files:

• hrca_lut.h
• hrca_lut.cpp

Generated by