lfLens Struct Reference

Lens data. Unknown fields are set to NULL or 0. More...

#include <lensfun.h>

Public Member Functions
	lfLens ()
	Create a new lens object, initializing all fields to default values.
	lfLens (const lfLens &other)
	~lfLens ()
	Destroy this and all associated objects.
lfLens &	operator= (const lfLens &other)
void	SetMaker (const char *val, const char *lang=NULL)
	Add a string to camera maker. More...
void	SetModel (const char *val, const char *lang=NULL)
	Add a string to camera model. More...
void	AddMount (const char *val)
	Add a new mount type to this lens. More...
void	AddCalibDistortion (const lfLensCalibDistortion *dc)
	Add a new distortion calibration structure to the pool. More...
bool	RemoveCalibDistortion (int idx)
	Remove a calibration entry from the distortion calibration data. More...
void	AddCalibTCA (const lfLensCalibTCA *tcac)
	Add a new transversal chromatic aberration calibration structure to the pool. More...
bool	RemoveCalibTCA (int idx)
	Remove a calibration entry from the TCA calibration data. More...
void	AddCalibVignetting (const lfLensCalibVignetting *vc)
	Add a new vignetting calibration structure to the pool. More...
bool	RemoveCalibVignetting (int idx)
	Remove a calibration entry from the vignetting calibration data. More...
void	AddCalibCrop (const lfLensCalibCrop *cc)
	Add a new lens crop structure to the pool. More...
bool	RemoveCalibCrop (int idx)
	Remove a lens crop entry from the lens crop structure. More...
DEPRECATED void	AddCalibFov (const lfLensCalibFov *cf)
	Add a new lens fov structure to the pool. More...
DEPRECATED bool	RemoveCalibFov (int idx)
	Remove a field of view entry from the lens fov structure. More...
void	AddCalibRealFocal (const lfLensCalibRealFocal *cf)
	Add a new lens real focal length structure to the pool. More...
bool	RemoveCalibRealFocal (int idx)
	Remove a real focal length entry from the lens real focal length structure. More...
void	GuessParameters ()
	This method fills some fields if they are missing but can be derived from other fields. More...
bool	Check ()
	Check if a lens object is valid. More...
bool	InterpolateDistortion (float focal, lfLensCalibDistortion &res) const
	Interpolate lens geometry distortion data for given focal length. More...
bool	InterpolateTCA (float focal, lfLensCalibTCA &res) const
	Interpolate lens TCA calibration data for given focal length. More...
bool	InterpolateVignetting (float focal, float aperture, float distance, lfLensCalibVignetting &res) const
	Interpolate lens vignetting model parameters for given focal length, aperture, and focus distance. More...
bool	InterpolateCrop (float focal, lfLensCalibCrop &res) const
	Interpolate lens crop data for given focal length. More...
DEPRECATED bool	InterpolateFov (float focal, lfLensCalibFov &res) const
	Interpolate lens fov data for given focal length. More...
bool	InterpolateRealFocal (float focal, lfLensCalibRealFocal &res) const
	Interpolate lens real focal length data for given focal length. More...

Static Public Member Functions
static const char *	GetDistortionModelDesc (lfDistortionModel model, const char **details, const lfParameter ***params)
	Get the human-readable distortion model name and the descriptions of the parameters required by this model. More...
static const char *	GetTCAModelDesc (lfTCAModel model, const char **details, const lfParameter ***params)
	Get the human-readable transversal chromatic aberrations model name and the descriptions of the parameters required by this model. More...
static const char *	GetVignettingModelDesc (lfVignettingModel model, const char **details, const lfParameter ***params)
	Get the human-readable vignetting model name and the descriptions of the parameters required by this model. More...
static const char *	GetCropDesc (lfCropMode mode, const char **details, const lfParameter ***params)
	Get the human-readable crop name and the descriptions of the parameters required by this model. More...
static const char *	GetLensTypeDesc (lfLensType type, const char **details)
	Get the human-readable lens type name and a short description of this lens type. More...

Public Attributes
lfMLstr	Maker
lfMLstr	Model
float	MinFocal
float	MaxFocal
float	MinAperture
float	MaxAperture
char **	Mounts
float	CenterX
float	CenterY
float	CropFactor
float	AspectRatio
lfLensType	Type
lfLensCalibDistortion **	CalibDistortion
lfLensCalibTCA **	CalibTCA
lfLensCalibVignetting **	CalibVignetting
lfLensCalibCrop **	CalibCrop
lfLensCalibFov **	CalibFov
lfLensCalibRealFocal **	CalibRealFocal
int	Score

Detailed Description

Lens data. Unknown fields are set to NULL or 0.

To manually create a new lens object, fill the fields for which you have data, and invoke the lfLens::Check() or lf_lens_check() function, which will check if existing data is enough and will automatically fill some fields using information extracted from lens name.

Examples:

example.c, lenstool.cpp, and tfun.cpp.

Constructor & Destructor Documentation

lfLens::lfLens

(

const lfLens &

other

)

Copy constructor.

Member Function Documentation

void lfLens::AddCalibCrop

(

const lfLensCalibCrop *

cc

)

Add a new lens crop structure to the pool.

The objects is copied, thus you can reuse it as soon as this function returns.

Parameters

cc	The lens crop structure.

void lfLens::AddCalibDistortion

(

const lfLensCalibDistortion *

dc

)

Add a new distortion calibration structure to the pool.

The objects is copied, thus you can reuse it as soon as this function returns.

Parameters

dc	The distortion calibration structure.

DEPRECATED void lfLens::AddCalibFov

(

const lfLensCalibFov *

cf

)

Add a new lens fov structure to the pool.

The Field of View (FOV) database entry is deprecated since Lensfun version 0.3 and will be removed in future releases.

The objects is copied, thus you can reuse it as soon as this function returns.

Parameters

cf	The lens fov structure.

void lfLens::AddCalibRealFocal

(

const lfLensCalibRealFocal *

cf

)

Add a new lens real focal length structure to the pool.

The objects is copied, thus you can reuse it as soon as this function returns.

Parameters

cf	The lens real focal length structure.

void lfLens::AddCalibTCA

(

const lfLensCalibTCA *

tcac

)

Add a new transversal chromatic aberration calibration structure to the pool.

The objects is copied, thus you can reuse it as soon as this function returns.

Parameters

tcac	The transversal chromatic aberration calibration structure.

void lfLens::AddCalibVignetting

(

const lfLensCalibVignetting *

vc

)

Add a new vignetting calibration structure to the pool.

The objects is copied, thus you can reuse it as soon as this function returns.

Parameters

vc	The vignetting calibration structure.

void lfLens::AddMount

(

const char *

val

)

Add a new mount type to this lens.

This is not a multi-language string, this it's just plain replaced.

Parameters

val	The new value to add to the Mounts array.

bool lfLens::Check

(

)

Check if a lens object is valid.

Returns

true if the required fields are ok.

static const char* lfLens::GetCropDesc ( lfCropMode  mode, const char **  details, const lfParameter ***  params  )

static

Get the human-readable crop name and the descriptions of the parameters required by this model.

Parameters

mode	The crop mode.
details	If not NULL, this string will be set to a more detailed (technical) description of the model. This string may contain newlines.
params	If not NULL, this variable will be set to a pointer to an array of lfParameter structures, every structure describes a model parameter. The list is NULL-terminated.

Returns

A short name of the distortion model or NULL if model is unknown.

static const char* lfLens::GetDistortionModelDesc ( lfDistortionModel  model, const char **  details, const lfParameter ***  params  )

static

Get the human-readable distortion model name and the descriptions of the parameters required by this model.

Parameters

model	The model.
details	If not NULL, this string will be set to a more detailed (technical) description of the model. This string may contain newlines.
params	If not NULL, this variable will be set to a pointer to an array of lfParameter structures, every structure describes a model parameter. The list is NULL-terminated.

Returns

A short name of the distortion model or NULL if model is unknown.

static const char* lfLens::GetLensTypeDesc ( lfLensType  type, const char **  details  )

static

Get the human-readable lens type name and a short description of this lens type.

Parameters

type	Lens type.
details	If not NULL, this string will be set to a more detailed (technical) description of the lens type. This string may contain newlines.

Returns

A short name of the lens type or NULL if model is unknown.

static const char* lfLens::GetTCAModelDesc ( lfTCAModel  model, const char **  details, const lfParameter ***  params  )

static

Get the human-readable transversal chromatic aberrations model name and the descriptions of the parameters required by this model.

Parameters

model	The model.
details	If not NULL, this string will be set to a more detailed (technical) description of the model. This string may contain newlines.
params	If not NULL, this variable will be set to a pointer to an array of lfParameter structures, every structure describes a model parameter. The list is NULL-terminated.

Returns

A short name of the TCA model or NULL if model is unknown.

static const char* lfLens::GetVignettingModelDesc ( lfVignettingModel  model, const char **  details, const lfParameter ***  params  )

static

Get the human-readable vignetting model name and the descriptions of the parameters required by this model.

Parameters

model	The model.
details	If not NULL, this string will be set to a more detailed (technical) description of the model. This string may contain newlines.
params	If not NULL, this variable will be set to a pointer to an array of lfParameter structures, every structure describes a model parameter. The list is NULL-terminated.

Returns

A short name of the vignetting model or NULL if model is unknown.

void lfLens::GuessParameters

(

)

This method fills some fields if they are missing but can be derived from other fields.

This includes such non-obvious parameters like the range of focal lengths or the range of apertures, which can be derived from lens named (which is intelligently parsed) or from the list of calibrations.

bool lfLens::InterpolateCrop	(	float	focal,
		lfLensCalibCrop &	res
	)		const

Interpolate lens crop data for given focal length.

Parameters

focal	The focal length in mm at which we need image parameters.
res	The resulting interpolated information data.

bool lfLens::InterpolateDistortion	(	float	focal,
		lfLensCalibDistortion &	res
	)		const

Interpolate lens geometry distortion data for given focal length.

Parameters

focal	The focal length in mm at which we need geometry distortion parameters.
res	The resulting interpolated model.

DEPRECATED bool lfLens::InterpolateFov	(	float	focal,
		lfLensCalibFov &	res
	)		const

Interpolate lens fov data for given focal length.

The Field of View (FOV) database entry is deprecated since Lensfun version 0.3 and will be removed in future releases.

Parameters

focal	The focal length in mm at which we need image parameters.
res	The resulting interpolated information data.

bool lfLens::InterpolateRealFocal	(	float	focal,
		lfLensCalibRealFocal &	res
	)		const

Interpolate lens real focal length data for given focal length.

The Field of View (FOV) database entry is deprecated since Lensfun version 0.3 and will be removed in future releases.

Parameters

focal	The nominal focal length in mm at which we need image parameters.
res	The resulting interpolated information data.

bool lfLens::InterpolateTCA	(	float	focal,
		lfLensCalibTCA &	res
	)		const

Interpolate lens TCA calibration data for given focal length.

Parameters

focal	The focal length in mm at which we need TCA parameters.
res	The resulting interpolated model.

bool lfLens::InterpolateVignetting	(	float	focal,
		float	aperture,
		float	distance,
		lfLensCalibVignetting &	res
	)		const

Interpolate lens vignetting model parameters for given focal length, aperture, and focus distance.

Parameters

focal	The focal length in mm for which we need vignetting parameters.
aperture	The aperture (f-number) for which we need vignetting parameters.
distance	The focus distance in meters (distance > 0) for which we need vignetting parameters.
res	The resulting interpolated model.

lfLens& lfLens::operator=

(

const lfLens &

other

)

Assignment operator

bool lfLens::RemoveCalibCrop

(

int

idx

)

Remove a lens crop entry from the lens crop structure.

Parameters

idx	The lens crop data index (zero-based).

bool lfLens::RemoveCalibDistortion

(

int

idx

)

Remove a calibration entry from the distortion calibration data.

Parameters

idx	The calibration data index (zero-based).

DEPRECATED bool lfLens::RemoveCalibFov

(

int

idx

)

Remove a field of view entry from the lens fov structure.

The Field of View (FOV) database entry is deprecated since Lensfun version 0.3 and will be removed in future releases.

Parameters

idx	The lens information data index (zero-based).

bool lfLens::RemoveCalibRealFocal

(

int

idx

)

Remove a real focal length entry from the lens real focal length structure.

Parameters

idx	The lens information data index (zero-based).

bool lfLens::RemoveCalibTCA

(

int

idx

)

Remove a calibration entry from the TCA calibration data.

Parameters

idx	The calibration data index (zero-based).

bool lfLens::RemoveCalibVignetting

(

int

idx

)

Remove a calibration entry from the vignetting calibration data.

Parameters

idx	The calibration data index (zero-based).

void lfLens::SetMaker	(	const char *	val,
		const char *	lang = NULL
	)

Add a string to camera maker.

If lang is NULL, this replaces the default value, otherwise a new language value is appended.

Parameters

val	The new value for the Maker field.
lang	The language this field is in.

void lfLens::SetModel	(	const char *	val,
		const char *	lang = NULL
	)

Add a string to camera model.

If lang is NULL, this replaces the default value, otherwise a new language value is appended.

Parameters

val	The new value for the Model field.
lang	The language this field is in.

Member Data Documentation

float lfLens::AspectRatio

Aspect ratio of the images used for calibration measurements.

Examples:

tfun.cpp.

lfLensCalibCrop** lfLens::CalibCrop

Crop data, NULL-terminated (unsorted)

lfLensCalibDistortion** lfLens::CalibDistortion

Lens distortion calibration data, NULL-terminated (unsorted)

lfLensCalibFov** lfLens::CalibFov

Field of view calibration data, NULL-terminated (unsorted)

lfLensCalibRealFocal** lfLens::CalibRealFocal

Real focal length calibration data, NULL-terminated (unsorted)

lfLensCalibTCA** lfLens::CalibTCA

Lens TCA calibration data, NULL-terminated (unsorted)

lfLensCalibVignetting** lfLens::CalibVignetting

Lens vignetting calibration data, NULL-terminated (unsorted)

float lfLens::CenterX

The horizontal shift of all lens distortions. Note that distortion and TCA uses same geometrical lens center. It is given as a relative value to avoide dependency on the image and/or sensor sizes. The calibrated delta X and Y values are numbers in the -0.5 .. +0.5 range. For 1 we take the maximal image dimension (width or height) - this is related to the fact that the lens has a circular field of projection disregarding sensor size.

Examples:

tfun.cpp.

float lfLens::CenterY

The vertical shift of all lens distortions. (0,0) for geometric center

Examples:

tfun.cpp.

float lfLens::CropFactor

Crop factor at which calibration measurements were taken. Must be defined.

Examples:

lenstool.cpp, and tfun.cpp.

lfMLstr lfLens::Maker

Lens maker (ex: "Rollei")

Examples:

tfun.cpp.

float lfLens::MaxAperture

Biggest f-number possible (ex: 22).

Examples:

tfun.cpp.

float lfLens::MaxFocal

Maximum focal length, mm (ex: 105). Can be equal to MinFocal.

Examples:

tfun.cpp.

float lfLens::MinAperture

Smallest f-number possible (ex: 3.5).

Examples:

lenstool.cpp, and tfun.cpp.

float lfLens::MinFocal

Minimum focal length, mm (ex: 35).

Examples:

lenstool.cpp, and tfun.cpp.

lfMLstr lfLens::Model

Lens model (ex: "Zoom-Rolleinar")

Examples:

lenstool.cpp, and tfun.cpp.

char** lfLens::Mounts

Available mounts (NULL-terminated list) (ex: { "QBM", NULL })

Examples:

example.c, and tfun.cpp.

int lfLens::Score

Lens matching score, used while searching: not actually a lens parameter

lfLensType lfLens::Type

Lens type

---

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

• lensfun.h