IntegerMathOps.C File Reference

#include "Image/IntegerMathOps.H"
#include "Image/CutPaste.H"
#include "Image/ImageSetOps.H"
#include "Image/MathOps.H"
#include "Image/Pixels.H"
#include "Image/PyramidCache.H"
#include "Image/ShapeOps.H"
#include "rutz/rand.h"

Include dependency graph for IntegerMathOps.C:

Go to the source code of this file.

Functions
int	intgScaleFromByte (const byte *src, const uint nbits)
	shift left if nbits > 8; shift right if nbits < 8
int	intgScaleFromFloat (const float *src, const uint nbits)
	assume input range is [0..255]; shift left if nbits > 8; shift right if nbits < 8
Image< int >	intgScaleFromByte (const Image< byte > *src, const uint nbits)
	shift left if nbits > 8; shift right if nbits < 8
Image< int >	intgScaleFromFloat (const Image< float > *src, const uint nbits)
	assume input range is [0..255]; shift left if nbits > 8; shift right if nbits < 8
Image< PixRGB< int > >	intgScaleFromByte (const Image< PixRGB< byte > > *src, const uint nbits)
	shift left if nbits > 8; shift right if nbits < 8
Image< int >	intgScaleLuminanceFromByte (const Image< PixRGB< byte > > *src, const uint nbits)
	get the luminance with nbits of precision of the input image
Image< PixRGB< int > >	intgScaleFromFloat (const Image< PixRGB< float > > *src, const uint nbits)
	assume input range is [0..255]; shift left if nbits > 8; shift right if nbits < 8
Image< float >	intgScaleToFloat (const Image< int > *src, const uint nbits)
	Convert from out integer representation to floats.
Image< int >	intgLowPass5xDecX (const Image< int > &src, const integer_math *imath)
Image< int >	intgLowPass5yDecY (const Image< int > &src, const integer_math *imath)
Image< int >	intgXFilterClean (const Image< int > &src, const int *hFilt, const int hfs, const int shiftbits, const integer_math *imath)
Image< int >	intgYFilterClean (const Image< int > &src, const int *vFilt, const int vfs, const int shiftbits, const integer_math *imath)
Image< int >	intgLowPass9x (const Image< int > &src, const integer_math *imath)
Image< int >	intgLowPass9y (const Image< int > &src, const integer_math *imath)
Image< int >	intgLowPassX (int filterSize, const Image< int > &src, const integer_math *imath)
Image< int >	intgLowPassY (int filterSize, const Image< int > &src, const integer_math *imath)
Image< int >	intgLowPass (int filterSize, const Image< int > &src, const integer_math *imath)
Image< int >	intgQuadEnergy (const Image< int > &img1, const Image< int > &img2)
Image< int >	intgOrientedFilter (const Image< int > &src, const float k, const float theta, const integer_math *imath)
void	intgInplaceAttenuateBorders (Image< int > &a, int size)
ImageSet< int >	intgBuildPyrLaplacian (const Image< int > &image, int firstlevel, int depth, int filterSize, const integer_math *imath)
ImageSet< int >	intgBuildPyrOrientedFromLaplacian (const ImageSet< int > &lplc, const int filterSize, const float theta, const integer_math *imath)
ImageSet< int >	intgBuildPyrOriented (const Image< int > &image, int firstlevel, int depth, int filterSize, float theta, const integer_math *imath)
ImageSet< int >	intgBuildPyrGaussian (const Image< int > &image, int depth, int filterSize, const integer_math *imath)
Image< int >	intgDownSize (const Image< int > &src, const Dims &dims, const int filterWidth, const integer_math *imath)
Image< int >	intgRescale (const Image< int > &src, const Dims &dims)
void	intgInplaceAddBGnoise (Image< int > &src, int max)
Image< int >	intgMaxNormalize (const Image< int > &src, const int mi, const int ma, const MaxNormType normtyp)
Image< int >	intgMaxNormalizeNone (const Image< int > &src, const int nmi, const int nma)
Image< int >	intgMaxNormalizeStd (const Image< int > &src, const int nmi, const int nma)
Image< int >	intgCenterSurround (const ImageSet< int > &pyr, int lev1, int lev2, bool absol, const ImageSet< int > *clipPyr)
void	intgDoLowThresh (ImageSet< int > &x, int threshold, int newval)
void	intgDoLowThreshAbs (ImageSet< int > &x, int threshold, int newval)
void	intgDoRectify (ImageSet< int > &x)
void	intgInplaceNormalize (Image< int > &dst, const int nmin, const int nmax, int *actualmin_p, int *actualmax_p)
Image< int >	intgCenterSurround (const Image< int > &center, const Image< int > &surround, const bool absol)
void	intgGetRGBY (const Image< PixRGB< byte > > &src, Image< int > &rg, Image< int > &by, const int threshfactor, const uint inputbits)
	Pixels with luminance less than MAX/threshfactor will have rg=by=0.
Image< int >	intgShiftImage (const Image< int > &srcImg, const int dxnumer, const int dynumer, const uint denombits)

---

Detailed Description

Fixed-point integer math versions of some of our floating-point Image functions

Definition in file IntegerMathOps.C.

---

Function Documentation

void intgGetRGBY	(	const Image< PixRGB< byte > > &	src,
		Image< int > &	rg,
		Image< int > &	by,
		const int	threshfactor,
		const uint	inputbits
	)

Pixels with luminance less than MAX/threshfactor will have rg=by=0.

Note that in the floating-point version getRGBY(), we take a luminance threshold and test

((r+g+b)/3 < thresh)

where thresh is usually set to 25.5, i.e. 255/10. Here, to avoid loss of precision, we want to avoid any divisions, so instead we test

(threshfactor*(r+g+b) < 3*MAX)

which is equivalent to, but more precise than,

((r+g+b)/3 < MAX/threshfactor).

Definition at line 1140 of file IntegerMathOps.C.

References abs(), ASSERT, Image< T >::begin(), Image< T >::beginw(), Image< T >::end(), Image< T >::getDims(), Image< T >::initialized(), lum, and NO_INIT.

Image<PixRGB<int> > intgScaleFromByte	(	const Image< PixRGB< byte > > *	src,
		const uint	nbits
	)

shift left if nbits > 8; shift right if nbits < 8

src is a pointer (rather than a reference) to prevent unwanted implicit conversions

Definition at line 96 of file IntegerMathOps.C.

References NO_INIT.

Image<int> intgScaleFromByte	(	const Image< byte > *	src,
		const uint	nbits
	)

shift left if nbits > 8; shift right if nbits < 8

src is a pointer (rather than a reference) to prevent unwanted implicit conversions

Definition at line 74 of file IntegerMathOps.C.

int intgScaleFromByte	(	const byte *	src,
		const uint	nbits
	)

shift left if nbits > 8; shift right if nbits < 8

src is a pointer (rather than a reference) to prevent unwanted implicit conversions

Definition at line 52 of file IntegerMathOps.C.

Image<PixRGB<int> > intgScaleFromFloat	(	const Image< PixRGB< float > > *	src,
		const uint	nbits
	)

assume input range is [0..255]; shift left if nbits > 8; shift right if nbits < 8

src is a pointer (rather than a reference) to prevent unwanted implicit conversions

Definition at line 161 of file IntegerMathOps.C.

Image<int> intgScaleFromFloat	(	const Image< float > *	src,
		const uint	nbits
	)

assume input range is [0..255]; shift left if nbits > 8; shift right if nbits < 8

src is a pointer (rather than a reference) to prevent unwanted implicit conversions

Definition at line 85 of file IntegerMathOps.C.

int intgScaleFromFloat	(	const float *	src,
		const uint	nbits
	)

assume input range is [0..255]; shift left if nbits > 8; shift right if nbits < 8

src is a pointer (rather than a reference) to prevent unwanted implicit conversions

Definition at line 63 of file IntegerMathOps.C.

Referenced by IntegerDirectionChannel::IntegerDirectionChannel(), and IntegerDirectionChannel::start1().

Image<int> intgScaleLuminanceFromByte	(	const Image< PixRGB< byte > > *	src,
		const uint	nbits
	)

get the luminance with nbits of precision of the input image

Definition at line 140 of file IntegerMathOps.C.

References Image< T >::begin(), and NO_INIT.

Image<float> intgScaleToFloat	(	const Image< int > *	src,
		const uint	nbits
	)

Convert from out integer representation to floats.

src is a pointer (rather than a reference) to prevent unwanted implicit conversions

Definition at line 172 of file IntegerMathOps.C.