flatkurve Class Reference

#include <imgclass.hpp>

Inheritance diagram for flatkurve:

base refererrect $classeichkurve.html 6,18 73,42 [legend]

Detailed Description

linear transform eichkurve, deprecated

flatkurve does nothing when converting from an unsigned 16 bit integer to floats. It is only dummy for functions expecting an eichkurve and should not be used any longer, since those functions have been eliminated.

Deprecated:: Don't use flatkurve if there is no need to. For example, the code

          flatkurve fk;
          bild16 test("test.his");
          bildfloat tbf(test, fk);

should be replaced by

          bild16 test("test.his");
          bildfloat tbf(test);

which does the same. You should not used unnormalized bildfloats

Definition at line 636 of file imgclass.hpp.


Public Member Functions
	flatkurve (bool normalize_=true)
virtual double	eichfun (double x) const
	Calibration function, which will be inverted.
virtual double	deichfun_dx (double x) const
	Derivative of the calibration function.
virtual double	initguess (bild16::data_t val) const
	Starting point for the iteration.
double	operator() (bild16::data_t val) const
	Conversion operator.
void	table_write (const char *name) const
	Write the lookup table to a file.
Protected Member Functions
double	fsolve (bild16::data_t val, double hmin, double hmax) const
void	table_init (double hmin, double hmax)
Protected Attributes
double *	lookup
Static Protected Attributes
static const char	magic [] = "EICHTABELLE"
Private Attributes
bool	normalize

Constructor & Destructor Documentation

flatkurve::flatkurve ( bool normalize_ = true )

Definition at line 516 of file imgclass.cpp.

References initguess(), bild16::intensity_max, bild16::intensity_min, and eichkurve::lookup.

Member Function Documentation

double flatkurve::eichfun ( double x ) const [virtual]

Calibration function, which will be inverted.

Implements eichkurve.

Definition at line 527 of file imgclass.cpp.

References bild16::intensity_max, and normalize.

double flatkurve::deichfun_dx ( double x ) const [virtual]

Derivative of the calibration function.

Implements eichkurve.

Definition at line 532 of file imgclass.cpp.

References bild16::intensity_max, and normalize.

double flatkurve::initguess ( bild16::data_t val ) const [virtual]

Starting point for the iteration.

The implementation of initguess must return a starting value that triggers convergence to the solution. Otherwise table_init may hang.

Implements eichkurve.

Definition at line 522 of file imgclass.cpp.

References bild16::intensity_max, and normalize.

Referenced by flatkurve().

double eichkurve::operator() ( bild16::data_t val ) const [inline, inherited]

Conversion operator.

The function evaluation operator looks up an element in the lookup table and returns it. Initially, it was meant for usage such as:

        tablekurve tk("somecalib.data");
        bild16 bild("someimage.his");
        bildfloat bfl;

        MAP(bild) {
          bfl(y,x)=tk(bild(y,x));
        }

But because of point-wise float corrections necessary to overcome the deficiencies of the detector, it must now be applied to floating point images. bildfloat features a special member function for this purpose.

Definition at line 530 of file imgclass.hpp.

References eichkurve::lookup.

void eichkurve::table_write ( const char * name ) const [inherited]

Write the lookup table to a file.

Definition at line 462 of file imgclass.cpp.

References eichkurve::lookup, and eichkurve::magic.