imaging::GrayValue Class Reference
[Image Module]

Class for 8-bit grayscale values. More...

#include <GrayValue.hpp>

List of all members.

Public Member Functions
	GrayValue (const GrayValue &value)
	GrayValue (const Color &c_value)
	GrayValue (unsigned char value)
	GrayValue (float_t value)
GrayValue &	operator= (GrayValue gray_value)
GrayValue &	operator= (unsigned char value)
GrayValue &	operator= (float_t value)
	operator unsigned char () const
	operator float_t () const

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Detailed Description

Class for 8-bit grayscale values.

Objects of this class represent 8-bit pixel values, which are internally stored as an integer from 0 to 255. If GrayValue objects are evalued as floating point objects (by calling operator float_t() or GrayValue(float_t) the value is scaled to the interval [0, 1].

See also:

Color

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Constructor & Destructor Documentation

imaging::GrayValue::GrayValue

(

const GrayValue &

value

)

[inline]

Copy constructor.

imaging::GrayValue::GrayValue

(

const Color &

c_value

)

[explicit]

Construct a gray value from the colour value c_value. This function sets the gray value to the average of the red, green and blue values of c_value.

imaging::GrayValue::GrayValue

(

unsigned char

value

)

[inline, explicit]

Construct a gray value from value.

imaging::GrayValue::GrayValue

(

float_t

value

)

[inline, explicit]

Construct a gray value from value. The input value is multiplied by 255 and then converted to an 8-bit value.

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Member Function Documentation

GrayValue& imaging::GrayValue::operator=

(

GrayValue

gray_value

)

[inline]

Assignement operator.

References _value.

GrayValue& imaging::GrayValue::operator=

(

unsigned char

value

)

[inline]

Assignement operator.

GrayValue& imaging::GrayValue::operator=

(

float_t

value

)

[inline]

Assignement operator.

imaging::GrayValue::operator unsigned char

(

)

const [inline]

Type cast to unsigned char.

imaging::GrayValue::operator float_t

(

)

const [inline]

Type cast to float_t. The grayscale value is converted to floating point precision and divided by 255.

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

• imaging2/image/GrayValue.hpp
• imaging2/image/GrayValue.cxx