Public Member Functions
	Looks (size_t colsLooks, size_t rowsLooks)
	Constructor with multi-looking factor. More...

void	multilook (isce3::io::Raster &input_raster, isce3::io::Raster &output_raster, int exponent=0)
	Multi-looking with rasters. More...

void	multilook (std::valarray< T > &input, std::valarray< T > &output)
	Multi-looking an array of real data. More...

void	multilook (std::valarray< T > &input, std::valarray< T > &output, T noDataValue)
	Multi-looking an array of real data (excluding noData values) More...

void	multilook (std::valarray< T > &input, std::valarray< bool > &mask, std::valarray< T > &output)
	Multi-looking an array of real data. More...

void	multilook (std::valarray< T > &input, std::valarray< T > &weights, std::valarray< T > &output)
	Multi-looking an array of real data (a weighted averaging) More...

void	multilook (std::valarray< std::complex< T >> &input, std::valarray< std::complex< T >> &output)
	Multi-looking an array of complex data. More...

void	multilook (std::valarray< std::complex< T >> &input, std::valarray< std::complex< T >> &output, std::complex< T > noDataValue)
	Multi-looking an array of complex data (excluding noData values) More...

void	multilook (std::valarray< std::complex< T >> &input, std::valarray< bool > &mask, std::valarray< std::complex< T >> &output)
	Multi-looking an array of complex data. More...

void	multilook (std::valarray< std::complex< T >> &input, std::valarray< T > &weights, std::valarray< std::complex< T >> &output)
	Multi-looking an array of complex data. More...

void	multilook (std::valarray< std::complex< T >> &input, std::valarray< T > &output, int exponent)
	Multi-looking amplitude of an array of complex data. More...

void	nrows (int)
	Set number of rows in the data before multi-looking. More...

void	ncols (int)
	Set number of columns in the data before multi-looking. More...

void	rowsLooks (int)
	Set number of looks to be taken on rows. More...

void	colsLooks (int)
	Set number of looks to be taken on columns. More...

void	nrowsLooked (int)
	Set number rows after mult-looking. More...

void	ncolsLooked (int)
	Set number of columns after multi-looking. More...

Constructor & Destructor Documentation

template<class T >

isce3::signal::Looks< T >::Looks	(	size_t	colsLooks,
		size_t	rowsLooks
	)

inline

Constructor with multi-looking factor.

Parameters

[in]	colsLooks	number of looks in the range direction (columns)
[in]	rowsLooks	number of looks in the azimuth direction (rows)

Member Function Documentation

template<class T >

void isce3::signal::Looks< T >::colsLooks ( int numLooksCol )

inline

Set number of looks to be taken on columns.

Parameters

[in] numLooksCol number of looks to be taken on columns

template<class T >

void isce3::signal::Looks< T >::multilook	(	isce3::io::Raster &	input_raster,
		isce3::io::Raster &	output_raster,
		int	exponent = `0`
	)

Multi-looking with rasters.

Parameters

[in]	input_raster	input raster
[out]	output	raster
[in]	exponent	the power to which the absolute of complex data are raisen to before multi-looking. If exponent = 0, the default exponent is used, i.e. exponent = 1 (linear) for float-to-float or complex-to-complex multilooking; or exponent = 2 (squared) for complex-to-float multilooking.

template<class T >

void isce3::signal::Looks< T >::multilook	(	std::valarray< T > &	input,
		std::valarray< T > &	output
	)

Multi-looking an array of real data.

Parameters

[in] input input array to be multi-looked
Parameters

[out] output output multilooked and downsampled array

template<class T >

void isce3::signal::Looks< T >::multilook	(	std::valarray< T > &	input,
		std::valarray< T > &	output,
		T	noDataValue
	)

Multi-looking an array of real data (excluding noData values)

Parameters

[in]	input	input array to be multi-looked
[out]	output	output multilooked and downsampled array
[in]	noDataValue	invalid data which will be excluded when multi-looking

template<class T >

void isce3::signal::Looks< T >::multilook	(	std::valarray< T > &	input,
		std::valarray< bool > &	mask,
		std::valarray< T > &	output
	)

Multi-looking an array of real data.

A binary mask is used to mask the data before multilooking

Parameters

[in]	input	input array to be multi-looked
[in]	mask	input boolean mask array to mask the input array before multi-looking
[out]	output	output multilooked and downsampled array

template<class T >

void isce3::signal::Looks< T >::multilook	(	std::valarray< T > &	input,
		std::valarray< T > &	weights,
		std::valarray< T > &	output
	)

Multi-looking an array of real data (a weighted averaging)

Parameters

[in]	input	input array to be multi-looked
[in]	weights	input weight array to weight the input array for multi-looking
[out]	output	output multilooked and downsampled array

template<class T >

void isce3::signal::Looks< T >::multilook	(	std::valarray< std::complex< T >> &	input,
		std::valarray< std::complex< T >> &	output
	)

Multi-looking an array of complex data.

Parameters

[in]	input	input array of complex data to be multi-looked
[out]	output	output multilooked and downsampled array of complex data

template<class T >

void isce3::signal::Looks< T >::multilook	(	std::valarray< std::complex< T >> &	input,
		std::valarray< std::complex< T >> &	output,
		std::complex< T >	noDataValue
	)

Multi-looking an array of complex data (excluding noData values)

Parameters

[in]	input	input array of complex data to be multi-looked
[out]	output	output multilooked and downsampled array of complex data
[out]	noDataValue	invalid complex data which will be excluded when multi-looking

template<class T >

void isce3::signal::Looks< T >::multilook	(	std::valarray< std::complex< T >> &	input,
		std::valarray< bool > &	mask,
		std::valarray< std::complex< T >> &	output
	)

Multi-looking an array of complex data.

A binary mask is used to mask data before multilooking

Parameters

[in]	input	input array of complex data to be multi-looked
[in]	mask	input boolean mask array to mask the input array before multi-looking
[out]	noDataValue	invalid complex data which will be excluded when multi-looking

template<class T >

void isce3::signal::Looks< T >::multilook	(	std::valarray< std::complex< T >> &	input,
		std::valarray< T > &	weights,
		std::valarray< std::complex< T >> &	output
	)

Multi-looking an array of complex data.

The complex data are weighted based on the input weight array.

Parameters

[in]	input	input array of complex data to be multi-looked
[in]	weights	input weight array to weight the input array for multi-looking
[out]	noDataValue	invalid complex data which will be excluded when multi-looking

template<class T >

void isce3::signal::Looks< T >::multilook	(	std::valarray< std::complex< T >> &	input,
		std::valarray< T > &	output,
		int	exponent
	)

Multi-looking amplitude of an array of complex data.

The amplitudes may be raised by an exponent before summation

\[ a = \frac{\sum_{i=1}^{N} |x_i|^{exponent}}{N} \]

where \(a\) represents the sum of amplitudes (to the power of exponent) in a window, N is the number of pixels in the multi-looking window, and x_i is the ith element of the complex data.

Parameters

[in]	input	input array of complex data
[out]	output	output array of real data
[in]	exponent	the power to which the absolute of complex data are raisen to before multi-looking

template<class T >

void isce3::signal::Looks< T >::ncols ( int numberOfColumns )

inline

Set number of columns in the data before multi-looking.

Parameters

[in] numberOfColumns number of columns before multi-looking

template<class T >

void isce3::signal::Looks< T >::ncolsLooked ( int numberOfColumns )

inline

Set number of columns after multi-looking.

Parameters

[in] numberOfColumns number of columns after multi-looking

template<class T >

void isce3::signal::Looks< T >::nrows ( int numberOfRows )

inline

Set number of rows in the data before multi-looking.

Parameters

[in] numberOfRows number of rows before multi-looking

template<class T >

void isce3::signal::Looks< T >::nrowsLooked ( int numberOfRows )

inline

Set number rows after mult-looking.

Parameters

[in] numberOfRows number of rows after multi-looking

template<class T >

void isce3::signal::Looks< T >::rowsLooks ( int numLooksRow )

inline

Set number of looks to be taken on rows.

Parameters

[in] numLooksRow number of looks to be taken on rows

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

isce/cxx/isce3/signal/forward.h
isce/cxx/isce3/signal/Looks.h
isce/cxx/isce3/signal/Looks.cpp
isce/cxx/isce3/signal/Looks.icc

Public Member Functions

Constructor & Destructor Documentation

Member Function Documentation