These methods perform various rescaling operations on Images.

Todo:: Make some nice forwarding methods (e.g. just decimate(), rescale() (which would decide whether do call downsize, or rescaleBilinear), etc..)

See Also: Image macros to facilitate promotion of pixel types

Functions
template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >
Image< DestType >	nrt::rescaleBilinear (Image< PixType > const &src, Dims< int32 > const &dims)
	Scale to new width & height using bilinear interpolation.

template<typename promo = void>
GenericImage	nrt::rescaleBilinear (GenericImage const &src, Dims< int32 > const &dims)
	Scale to new width & height using bilinear interpolation - GenericImage version.

template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >
nrt::Image< DestType >	nrt::decimateX (nrt::Image< PixType > const &src, int factor=2)
	Decimate in X (take one every 'factor' pixels).

template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >
nrt::Image< DestType >	nrt::decimateY (nrt::Image< PixType > const &src, int const factor=2)
	Decimate in Y (take one every 'factor' pixels). More...

template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >
nrt::Image< DestType >	nrt::decimateXY (nrt::Image< PixType > const &src, int const xfactor=2, int const yfactor=-1)
	Decimate in X and Y (take one every 'factor' pixels). More...

template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >
nrt::Image< DestType >	nrt::downSize (nrt::Image< PixType > const &src, nrt::Dims< int > const &dims, int const filterWidth=9)
	Downsize using alternating lowpass/decimate operations. More...

template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >
nrt::Image< DestType >	nrt::lowPass5xDecX (nrt::Image< PixType > const &src, int const factor=2)
	Low-pass filter, Anderson's 5x5 separable, applied in X, and X decimated by factor.

template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >
nrt::Image< DestType >	nrt::lowPass5yDecY (nrt::Image< PixType > const &src, int const factor=2)
	Low-pass filter, Anderson's 5x5 separable, applied in Y, and Y decimated by factor.

Function Documentation

template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >

nrt::Image< DestType > nrt::decimateY	(	nrt::Image< PixType > const &	src,
		int const	factor = `2`
	)

inline

Decimate in Y (take one every 'factor' pixels).

Definition at line 163 of file RescaleImpl.H.

References nrt::Image< T, Flags >::begin(), nrt::Image< T, Flags >::const_begin(), nrt::Image< T, Flags >::height(), nrt::None, and nrt::Image< T, Flags >::width().

template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >

nrt::Image< DestType > nrt::decimateXY	(	nrt::Image< PixType > const &	src,
		int const	xfactor = `2`,
		int const	yfactor = `-1`
	)

inline

Decimate in X and Y (take one every 'factor' pixels).

Parameters

src	source Image
xfactor	factor by which to decimate in the x direction
yfactor	factor by which to decimate in the y direction; if this value is less than zero, then just take yfactor=xfactor

Definition at line 191 of file RescaleImpl.H.

References nrt::Image< T, Flags >::begin(), nrt::Image< T, Flags >::const_begin(), nrt::Image< T, Flags >::height(), nrt::None, and nrt::Image< T, Flags >::width().

template<NRT_PROMOTE_PIX_NO_DEFAULT_PROMO >

nrt::Image<DestType> nrt::downSize	(	nrt::Image< PixType > const &	src,
		nrt::Dims< int > const &	dims,
		int const	filterWidth = `9`
	)

Downsize using alternating lowpass/decimate operations.

The width used internally in the lowpass filters is given by filterWidth (default = 9).

Note: The dims parameter must have the same aspect ratio as src.dims().

Todo:: This seems to not work

Functions

Function Documentation