vil_rgba< T > Struct Template Reference

This is the appropriate pixel type for RGBA colour images. More...

#include <vil_rgba.h>

List of all members.

Public Types
typedef T	value_type
Public Member Functions
T	R () const
T	G () const
T	B () const
T	A () const
	vil_rgba ()
	vil_rgba (T v)
	Create grey (v,v,v,1) vil_rgba cell from value v.
	vil_rgba (T red, T green, T blue, T alpha=1)
	Construct from four values.
bool	operator== (vil_rgba< T > const &o) const
	equality.
	vil_rgba (const vil_rgba< double > &that)
	vil_rgba (const vil_rgba< unsigned char > &that)
vil_rgba< T > &	operator= (const vil_rgba< double > &that)
vil_rgba< T > &	operator= (const vil_rgba< float > &that)
vil_rgba< T > &	operator= (const vil_rgba< unsigned char > &that)
T	grey () const
	Convert vil_rgba to gray using standard (.299, .587, .114) RGB weighting.
Public Attributes
T	r
T	g
T	b
T	a

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Detailed Description

template<class T>
struct vil_rgba< T >

This is the appropriate pixel type for RGBA colour images.

The purpose of rgba<T> is to provide an object which consists of four Ts arranged in order and which can be referred to as 'R', 'G', 'B' and 'A'. Thus, if win32 does something funny when blitting an rgba bitmap to screen, that's up to the renderer to sort out.

Currently also includes the following `utilities':

1. conversion to ubyte (luminance of vil_rgba: weights (0.299, 0.587, 0.114, 0)).
2. min and max of vil_rgba<byte> values, useful for morphological operations.
3. arithmetic operations

Definition at line 27 of file vil_rgba.h.

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Member Typedef Documentation

template<class T>

typedef T vil_rgba< T >::value_type

Definition at line 30 of file vil_rgba.h.

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Constructor & Destructor Documentation

template<class T>

vil_rgba< T >::vil_rgba

(

)

[inline]

Definition at line 39 of file vil_rgba.h.

template<class T>

vil_rgba< T >::vil_rgba

(

T

v

)

[inline]

Create grey (v,v,v,1) vil_rgba cell from value v.

This provides a conversion from T to vil_rgba<T>, needed by e.g. two constructors in IUE_filter.h.

Definition at line 43 of file vil_rgba.h.

template<class T>

vil_rgba< T >::vil_rgba	(	T	red,
		T	green,
		T	blue,
		T	alpha = 1
	)		[inline]

Construct from four values.

Definition at line 47 of file vil_rgba.h.

template<class T>

vil_rgba< T >::vil_rgba

(

const vil_rgba< double > &

that

)

[inline]

Definition at line 76 of file vil_rgba.h.

template<class T>

vil_rgba< T >::vil_rgba

(

const vil_rgba< unsigned char > &

that

)

[inline]

Definition at line 83 of file vil_rgba.h.

---

Member Function Documentation

template<class T>

T vil_rgba< T >::A

(

)

const [inline]

Definition at line 37 of file vil_rgba.h.

template<class T>

T vil_rgba< T >::B

(

)

const [inline]

Definition at line 36 of file vil_rgba.h.

template<class T>

T vil_rgba< T >::G

(

)

const [inline]

Definition at line 35 of file vil_rgba.h.

template<class T>

T vil_rgba< T >::grey

(

)

const [inline]

Convert vil_rgba to gray using standard (.299, .587, .114) RGB weighting.

Definition at line 120 of file vil_rgba.h.

template<class T>

vil_rgba<T>& vil_rgba< T >::operator=

(

const vil_rgba< double > &

that

)

[inline]

Definition at line 91 of file vil_rgba.h.

template<class T>

vil_rgba<T>& vil_rgba< T >::operator=

(

const vil_rgba< float > &

that

)

[inline]

Definition at line 100 of file vil_rgba.h.

template<class T>

vil_rgba<T>& vil_rgba< T >::operator=

(

const vil_rgba< unsigned char > &

that

)

[inline]

Definition at line 109 of file vil_rgba.h.

template<class T>

bool vil_rgba< T >::operator==

(

vil_rgba< T > const &

o

)

const [inline]

equality.

Definition at line 51 of file vil_rgba.h.

template<class T>

T vil_rgba< T >::R

(

)

const [inline]

Definition at line 34 of file vil_rgba.h.

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Member Data Documentation

template<class T>

T vil_rgba< T >::a

Definition at line 33 of file vil_rgba.h.

template<class T>

T vil_rgba< T >::b

Definition at line 33 of file vil_rgba.h.

template<class T>

T vil_rgba< T >::g

Definition at line 33 of file vil_rgba.h.

template<class T>

T vil_rgba< T >::r

Definition at line 33 of file vil_rgba.h.

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

• core/vil/vil_rgba.h