ValueScaling Class Reference

Linear scaling and physical range for image intensities. More...

#include <ValueScaling.h>

Inheritance diagram for ValueScaling:

Collaboration diagram for ValueScaling:

Public Member Functions
	ValueScaling (double scale=1.0, double offset=0.0)
	ValueScaling (double scale, double offset, const drain::Range< double > &range)
	ValueScaling (const drain::ValueScaling &scaling)
	ValueScaling (const drain::UniTuple< double, 2 > &scaling)
	ValueScaling (const drain::ValueScaling &scalingIn, const drain::ValueScaling &scalingOut)
ValueScaling &	operator= (const drain::ValueScaling &scaling)
virtual void	setScaling (double scale, double offset)
	Set linear scaling.
virtual void	setScaling (const ValueScaling &scaling)
virtual const ValueScaling &	getScaling () const
	Get linear scaling.
virtual ValueScaling &	getScaling ()
	Get linear scaling.
void	setAbsoluteScale ()
	If the intensities of the image correspond to an absolute value (like count) then the scale should be reset to unity with this function.
void	setNormalScale (const std::type_info &t)
	For "small integer" types, resets offset and scale such that maximum code value corresponds to 1.0 (100% intensity). More...
void	setConversionScale (double scale, double offset=0.0, double scaleOut=1.0, double offsetOut=0.0)
	If the intensities of the image correspond to a physical value (like temperature), then the scaling coefficient should be set with this function.
void	setConversionScale (const drain::ValueScaling &s1, const drain::ValueScaling &s2)
	Set scaling for which scaling.inv(x) = s2.inv(s1.fwd(x))
void	setConversionScale (const Range< double > &r1, const Range< double > &r2)
void	setOptimalScale (const std::type_info &t)
	If storage type is integer, adjust scale such that resolution is maximized.
void	setPhysicalScale (const std::type_info &t, double min, double max)
	Sets physical range (min, max) and scales storage type accordingly.
void	setPhysicalScale (const std::type_info &t, const drain::ValueScaling &scaling)
	Sets physical range (min, max) and scales storage type accordingly.
const Range< double > &	getPhysicalRange () const
	Returns a typical or supported range for physical values.
Range< double > &	getPhysicalRange ()
	Returns a typical or supported range for physical values. Modifying the range will not change scaling.
void	setPhysicalMax (double max)
	In integer-valued images, set the physical values corresponding to [0, maxCodeValue].
template<class T >
void	setPhysicalRange (const Range< T > &range)
	Sets the supported range for physical values. Does not change scaling or type.
void	setPhysicalRange (double min, double max)
	Sets the supported range for physical values. Does not change scaling or type.
double	getScale () const
	Returns the intensity scaling factor. See set setScale()
double	getOffset () const
	Returns the intensity scaling offset, ie. b in a*x + b . See set setScale()
bool	isScaled () const
	Returns true, if scaling has effect ie. scale!=1.0 or offset!=0.0. More...
double	getMinPhys () const
	Returns the minimum physical value.
double	getMaxPhys () const
	Returns the maximum physical value.
bool	isPhysical () const
	Returns true, physical intensity range has been set.
void	adoptScaling (const drain::ValueScaling &srcScaling, const std::type_info &srcType, const std::type_info &dstType=typeid(void))
	Sets scale and offset according to physical range and current type.
double	fwd (double x) const
	Forward scaling: given encoded value x, returns corresponding value (possibly physically meaningful).
double	inv (double y) const
	Inverse scaling: given physically meaningful value y, returns the corresponding code value.
void	toStream (std::ostream &ostr) const
std::string	str () const
Public Member Functions inherited from UniTuple< double, 2 >
	UniTuple (const TT &... args)
	UniTuple (const UniTuple< double, N > &t)
	Copy constructor.
	UniTuple (std::initializer_list< S > l)
tuple_t &	operator= (const tuple_t &t)
tuple_t &	operator= (const value_type &value)
tuple_t &	operator= (std::initializer_list< S > l)
virtual const_iterator	begin () const override final
virtual iterator	begin () override final
virtual const_iterator	end () const override final
virtual iterator	end () override final
tuple_t &	tuple ()
const tuple_t &	tuple () const
void	debug (std::ostream &ostr) const
Public Member Functions inherited from TupleBase< S, N >
const S &	at (size_t i) const
	Return const reference to element i. More...
const S &	operator[] (size_t i) const
S &	at (size_t i)
	Return reference to element i. More...
S &	operator[] (size_t i)
bool	operator== (const tuplebase_t &t) const
	Equality operator.
bool	operator!= (const tuplebase_t &t) const
	Inequality operator.
template<class T >
T &	toSequence (T &sequence) const
	Copy elements to a Sequence, like stl::list, stl::set or stl::vector.
void	set (const tuplebase_t &t)
template<class T2 , size_t N2 = 2>
void	set (const TupleBase< T2, N2 > &t)
	Assign tuple of different type and/or size.
void	set (const S &arg)
template<typename ... SS>
void	set (const S &arg, const SS &... rest)
	Set element(s).
template<typename T >
void	set (std::initializer_list< T > l)
template<class T >
tuplebase_t &	assignSequence (T &sequence, bool LENIENT=false)
	Proposed for tuples only; derived classes should not shadow this. More...
void	fill (S i)
	Set all the elements to i.
void	clear ()
virtual std::ostream &	toStream (std::ostream &ostr, char separator=',') const
std::string	toStr (char separator=',') const
virtual void	updateTuple ()

Public Attributes
double &	scale
	Multiplicative coefficient \i a in: y = ax + b.
double &	offset
	Additive coefficient \i b in: y = ax + b.
drain::Range< double >	physRange
	Minimum and maximum physical value of the imaged quantity (not limited to corresponding to minCodeValue?).

Additional Inherited Members
Public Types inherited from UniTuple< double, 2 >
typedef double	value_type
typedef UniTuple< double, N >	tuple_t
typedef double *	iterator
typedef const double *	const_iterator
Public Types inherited from TupleBase< S, N >
typedef TupleBase< S, N >	tuplebase_t
typedef S	value_type
typedef S *	iterator
typedef S const *	const_iterator
Static Public Member Functions inherited from TupleBase< S, N >
static size_t	size ()
	Return the number of elements. More...
Static Public Attributes inherited from UniTuple< double, 2 >
static const size_t	tuple_size
Static Public Attributes inherited from TupleBase< S, N >
static const size_t	storageTypeSize = sizeof(S)
Protected Member Functions inherited from UniTuple< double, 2 >
	UniTuple (UniTuple< double, N2 > &tuple, size_t i)
double &	next ()
Protected Member Functions inherited from TupleBase< S, N >
void	setIndexed (size_t i)
	Argument stack endpoint function; final step of variadic argument set(arg, ...) .
template<typename T2 , typename ... TT>
void	setIndexed (size_t i, T2 arg, const TT &... rest)
	Worker called by set(T2 arg, T2 arg2, ...)
Protected Attributes inherited from UniTuple< double, 2 >
const iterator	start

Detailed Description

Linear scaling and physical range for image intensities.

Internally,drain::ValueScaling holds variables

• scale
• offset
• physRange.min (optional);
• maxPhysValue (optional);

drain::ValueScaling does not store information of storage type (no either on minimum and maximum values supported by storage types).

See also

drain::typeLimits

Member Function Documentation

isScaled()

bool isScaled ( ) const

inline

Returns true, if scaling has effect ie. scale!=1.0 or offset!=0.0.

Note: returns true if scale==0. Maybe false would be better.

setNormalScale()

void setNormalScale ( const std::type_info &  t )

inline

For "small integer" types, resets offset and scale such that maximum code value corresponds to 1.0 (100% intensity).

Applies to:

• char
• unsigned char
• short int
• unsigned short int

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

• src/drain/util/ValueScaling.h
• src/drain/util/ValueScaling.cpp