vpLuminanceDCT::vpMatrixZigZagIndex Class Reference

#include <vpFeatureLuminanceMapping.h>

Public Member Functions
	vpMatrixZigZagIndex ()
void	init (unsigned rows, unsigned cols)
void	getValues (const vpMatrix &m, unsigned int start, unsigned int end, vpColVector &s) const
void	setValues (const vpColVector &s, unsigned int start, vpMatrix &m) const

Detailed Description

Helper class to iterate and get/set the values from a matrix, following a zigzag pattern.

Examples

catchLuminanceMapping.cpp.

Definition at line 293 of file vpFeatureLuminanceMapping.h.

Constructor & Destructor Documentation

vpMatrixZigZagIndex()

vpLuminanceDCT::vpMatrixZigZagIndex::vpMatrixZigZagIndex

(

)

Definition at line 273 of file vpFeatureLuminanceMapping.cpp.

Member Function Documentation

getValues()

void vpLuminanceDCT::vpMatrixZigZagIndex::getValues	(	const vpMatrix &	m,
		unsigned int	start,
		unsigned int	end,
		vpColVector &	s ) const

Fill the vector s with (end - start) values, according to the zigzag matrix indexing strategy.

Parameters

m	the matrix
start	The first value. Use 0 to start with the matrix's top left value
end	The last value to store in the vector. (exclusive)
s	The vector in which to store the values

Examples

catchLuminanceMapping.cpp.

Definition at line 392 of file vpFeatureLuminanceMapping.cpp.

References vpException::dimensionError, vpArray2D< Type >::getCols(), and vpArray2D< Type >::getRows().

init()

void vpLuminanceDCT::vpMatrixZigZagIndex::init	(	unsigned	rows,
		unsigned	cols )

Initialize the ZigZag object. Computes and stores the zigzag indexing for a given matrix size.

Parameters

rows	the matrix's number of rows
cols	the matrix's number of cols

Examples

catchLuminanceMapping.cpp.

Definition at line 275 of file vpFeatureLuminanceMapping.cpp.

setValues()

void vpLuminanceDCT::vpMatrixZigZagIndex::setValues	(	const vpColVector &	s,
		unsigned int	start,
		vpMatrix &	m ) const

set the values in the matrix, according to the values stored in the vector s and the zigzag indexing strategy

Parameters

s	The vector from which to set the values
start	the zigzag index at which to start filling values
m	The matrix in which the values will be replaced

Examples

catchLuminanceMapping.cpp.

Definition at line 409 of file vpFeatureLuminanceMapping.cpp.

References vpException::dimensionError, vpArray2D< Type >::getCols(), vpArray2D< Type >::getRows(), and vpArray2D< Type >::size().