WlzArithmetic

Files
file	WlzImageArithmetic.c
	Functions for performing arithmetic on a pair of domain objects with grey values.
file	WlzRGBAImageArithmetic.c
	Performs image arithmetic on RGBA data. Both input files must be RGBA value type.
file	WlzRGBAScalarBinaryOp.c
	Apply a scalar binary operation to an RGBA image.
file	WlzRGBChanRatio.c
	Computes log ratio of RGB channels in a RGBA object.
file	WlzScalarArithmeticOp.c
	Functions which apply scalar arithmetic operations to domain objects.
file	WlzScalarBinaryOp.c
	Applies scalar binary operators to objects.
file	WlzScalarFn.c
	Code to apply scalar functions to scalar image values in Woolz objects.

Enumerations
enum	_WlzBinaryOperatorType {   WLZ_BO_ADD = 0,   WLZ_BO_SUBTRACT,   WLZ_BO_MULTIPLY,   WLZ_BO_DIVIDE,   WLZ_BO_MODULUS,   WLZ_BO_EQ,   WLZ_BO_NE,   WLZ_BO_GT,   WLZ_BO_GE,   WLZ_BO_LT,   WLZ_BO_LE,   WLZ_BO_AND,   WLZ_BO_OR,   WLZ_BO_XOR,   WLZ_BO_MAX,   WLZ_BO_MIN,   WLZ_BO_MAGNITUDE }
	Binary operators. Typedef: WlzBinaryOperatorType. More...

Functions
WlzObject *	WlzRGBAImageArithmetic (WlzObject *obj0, WlzObject *obj1, WlzBinaryOperatorType op, int overwrite, WlzErrorNum *dstErr)
	Performs image arithmetic on objects with RGBA values. See WlzImageArithmetic(). More...
WlzObject *	WlzRGBChanRatio (WlzObject *rgbObj, WlzRGBAColorChannel num, WlzRGBAColorChannel den, WlzRGBAColorChannel mul, int useMul, int norm, WlzErrorNum *dstErr)
	Computes log ratio of RGB channels in a RGBA object for each pixel using ratio \(r\) with \[ r = m \log(1 + \frac{n}{1 + d}). \] where m is the multipler channel value or unity if not used. This results in either an object with float values or if the normalise parameter is non-zero an object with unsigned byte values normalised to the range 0-255. The numerator and denominator channels must be red, green blue, yellow, magenta, cyan, hue, staturation, brightness, or grey (modulus). More...
WlzErrorNum	WlzGreyIncValuesInDomain (WlzObject *gObj, WlzObject *dObj)
	Increments all valus of the firstobjct which are within the domain of the second object. The domain of the first object must cover that of the second. More...
WlzErrorNum	WlzGreyIncValues2D (WlzObject *obj)
	Increments all values within the given object. More...
WlzObject *	WlzScalarBinaryOp2 (WlzObject *o1, WlzPixelV pval, WlzBinaryOperatorType op, WlzErrorNum *dstErr)
	Apply a binary operation (add subtract etc) to each pixel value in the given object. The operand value is in pval. More...
WlzObject *	WlzScalarAdd (WlzObject *o1, WlzPixelV pval, WlzErrorNum *dstErr)
	Add a value to each pixel of an object. More...
WlzObject *	WlzScalarSubtract (WlzObject *o1, WlzPixelV pval, WlzErrorNum *dstErr)
	Subtract a value from each pixel of an object. More...
WlzObject *	WlzScalarMultiply (WlzObject *o1, WlzPixelV pval, WlzErrorNum *dstErr)
	Multiply each pixel of an object. More...
WlzObject *	WlzScalarDivide (WlzObject *o1, WlzPixelV pval, WlzErrorNum *dstErr)
	Divide each pixel of an object. More...
WlzObject *	WlzScalarMulAdd (WlzObject *iObj, WlzPixelV m, WlzPixelV a, WlzGreyType rGType, WlzErrorNum *dstErr)
	Scales the values of the given Woolz object so that \(v_{new} = m v_{given} + a.\). More...
WlzErrorNum	WlzScalarBinaryOp (WlzObject *o1, WlzPixelV pval, WlzObject *o3, WlzBinaryOperatorType op)
	Perform the given binary operation for each grey value in image o1 with val putting the result in o3. The value table of o3 can be identical to that of o1 to allow overwriting. This function assumes that the domains of each object are the same. Unless overwriting is required then the functions WlzImageAdd, WlzImageSubtract etc. should be used. These return an object which is the intersection of the input objects. More...
WlzObject *	WlzScalarFn (WlzObject *sObj, WlzFnType fn, WlzErrorNum *dstErr)
	Computes a new object which shares the domain of the given object, but which has grey values that are the result of applying the given function to the grey values of the given object. More...

Detailed Description

Enumeration Type Documentation

enum _WlzBinaryOperatorType

Binary operators. Typedef: WlzBinaryOperatorType.

Enumerator
WLZ_BO_ADD
WLZ_BO_SUBTRACT
WLZ_BO_MULTIPLY
WLZ_BO_DIVIDE
WLZ_BO_MODULUS
WLZ_BO_EQ
WLZ_BO_NE
WLZ_BO_GT
WLZ_BO_GE
WLZ_BO_LT
WLZ_BO_LE
WLZ_BO_AND
WLZ_BO_OR
WLZ_BO_XOR
WLZ_BO_MAX
WLZ_BO_MIN
WLZ_BO_MAGNITUDE

Function Documentation

WlzObject* WlzRGBAImageArithmetic	(	WlzObject *	obj0,
		WlzObject *	obj1,
		WlzBinaryOperatorType	op,
		int	overwrite,
		WlzErrorNum *	dstErr
	)

Performs image arithmetic on objects with RGBA values. See WlzImageArithmetic().

Returns

New object.

Parameters

obj0	First object.
obj1	Second object.
op	Binary operator.
overwrite	Allow the destination object to share values with one of the given objects if non zero.
dstErr	Destination error pointer, may be NULL.

References _WlzCompoundArray::o, _WlzObject::type, WLZ_COMPOUND_ARR_1, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_ERR_PARAM_DATA, WLZ_GREY_RGBA, WLZ_RGBA_SPACE_RGB, WlzCompoundToRGBA(), WlzFreeObj(), WlzGreyTypeFromObj(), WlzImageArithmetic(), WlzMakeCompoundArray(), and WlzRGBAToCompound().

Referenced by WlzShadeCorrectBFDF().

WlzObject* WlzRGBChanRatio	(	WlzObject *	rgbObj,
		WlzRGBAColorChannel	num,
		WlzRGBAColorChannel	den,
		WlzRGBAColorChannel	mul,
		int	useMul,
		int	norm,
		WlzErrorNum *	dstErr
	)

Computes log ratio of RGB channels in a RGBA object for each pixel using ratio \(r\) with

\[ r = m \log(1 + \frac{n}{1 + d}). \]

where m is the multipler channel value or unity if not used. This results in either an object with float values or if the normalise parameter is non-zero an object with unsigned byte values normalised to the range 0-255. The numerator and denominator channels must be red, green blue, yellow, magenta, cyan, hue, staturation, brightness, or grey (modulus).

Returns

Ratio object or NULL on error.

Parameters

rgbObj	The input RGBA object.
num	Channel for numerator in ratio.
den	Channel for denominator in ratio.
mul	Channel for multiplier value.
useMul	Multiplier used if non zero.
norm	Normalise the object values and return a ubyte object.
dstErr	Destination error pointer, may be NULL.

References ALG_MAX3, ALG_MIN3, _WlzVoxelValues::bckgrnd, _WlzValues::core, _WlzDomain::core, _WlzObject::domain, _WlzPlaneDomain::domains, _WlzGreyP::flp, _WlzGreyV::flv, _WlzVoxelValues::lastpl, _WlzIntervalWSpace::lftpos, _WlzDomain::p, _WlzGreyWSpace::pixeltype, _WlzPlaneDomain::plane1, _WlzVoxelValues::plane1, _WlzGreyP::rgbp, _WlzIntervalWSpace::rgtpos, _WlzPixelV::type, _WlzObject::type, _WlzCoreValues::type, _WlzVoxelValues::type, _WlzGreyWSpace::u_grintptr, _WlzGreyV::ubv, _WlzPixelV::v, _WlzValues::v, _WlzObject::values, _WlzVoxelValues::values, _WlzValues::vox, WLZ_2D_DOMAINOBJ, WLZ_3D_DOMAINOBJ, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_EOO, WLZ_ERR_GREY_TYPE, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_ERR_PARAM_DATA, WLZ_ERR_VALUES_NULL, WLZ_ERR_VALUES_TYPE, WLZ_GREY_FLOAT, WLZ_GREY_RGBA, WLZ_GREY_TAB_RAGR, WLZ_GREY_UBYTE, WLZ_NINT, WLZ_RGBA_BLUE_GET, WLZ_RGBA_CHANNEL_BLUE, WLZ_RGBA_CHANNEL_BRIGHTNESS, WLZ_RGBA_CHANNEL_CYAN, WLZ_RGBA_CHANNEL_GREEN, WLZ_RGBA_CHANNEL_GREY, WLZ_RGBA_CHANNEL_HUE, WLZ_RGBA_CHANNEL_MAGENTA, WLZ_RGBA_CHANNEL_RED, WLZ_RGBA_CHANNEL_SATURATION, WLZ_RGBA_CHANNEL_YELLOW, WLZ_RGBA_GREEN_GET, WLZ_RGBA_MODULUS, WLZ_RGBA_RED_GET, WlzAssignObject(), WlzAssignValues(), WlzConvertPix(), WlzFreeObj(), WlzFreeValues(), WlzGreyNormalise(), WlzGreyTableIsTiled(), WlzGreyValueTableType(), WlzInitGreyScan(), WlzMakeMain(), WlzMakeVoxelValueTb(), WlzNewValueTb(), WlzNextGreyInterval(), and WlzSetBackground().

WlzErrorNum WlzGreyIncValuesInDomain	(	WlzObject *	gObj,
		WlzObject *	dObj
	)

Increments all valus of the firstobjct which are within the domain of the second object. The domain of the first object must cover that of the second.

Returns

Woolz error code.

Parameters

gObj	First object.
dObj	Second object.

References ALG_MAX, ALG_MIN, _WlzValues::core, _WlzDomain::core, _WlzObject::domain, _WlzPlaneDomain::domains, _WlzPlaneDomain::lastpl, _WlzDomain::p, _WlzPlaneDomain::plane1, _WlzObject::type, _WlzCoreValues::type, _WlzObject::values, _WlzVoxelValues::values, _WlzValues::vox, WLZ_2D_DOMAINOBJ, WLZ_3D_DOMAINOBJ, WLZ_ERR_DOMAIN_DATA, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_ERR_VALUES_NULL, WLZ_ERR_VALUES_TYPE, WlzAssignObject(), WlzFreeObj(), WlzGreyIncValues2D(), WlzGreyTableIsTiled(), and WlzMakeMain().

Referenced by WlzDomainOccupancy().

WlzErrorNum WlzGreyIncValues2D

(

WlzObject *

obj

)

Increments all values within the given object.

Returns

Woolz error code.

Parameters

obj	Given object.

References _WlzGreyP::dbp, _WlzGreyP::flp, _WlzGreyP::inp, _WlzIntervalWSpace::lftpos, _WlzGreyWSpace::pixeltype, _WlzIntervalWSpace::rgtpos, _WlzGreyP::shp, _WlzGreyWSpace::u_grintptr, _WlzGreyP::ubp, WLZ_ERR_EOO, WLZ_ERR_NONE, WLZ_GREY_DOUBLE, WLZ_GREY_FLOAT, WLZ_GREY_INT, WLZ_GREY_SHORT, WLZ_GREY_UBYTE, WlzEndGreyScan(), WlzInitGreyScan(), and WlzNextGreyInterval().

Referenced by WlzGreyIncValuesInDomain().

WlzObject* WlzScalarBinaryOp2	(	WlzObject *	o1,
		WlzPixelV	pval,
		WlzBinaryOperatorType	op,
		WlzErrorNum *	dstErr
	)

Apply a binary operation (add subtract etc) to each pixel value in the given object. The operand value is in pval.

Returns

Object with transformed grey-values.

Parameters

o1	Input object
pval	Pixel value for binary operation.
op	Opertor
dstErr	Error return.

Source:

WlzScalarArithmeticOp.c

References _WlzValues::core, _WlzDomain::core, _WlzObject::domain, _WlzValues::obj, _WlzDomain::p, _WlzGreyV::shv, _WlzPixelV::type, _WlzObject::type, _WlzPlaneDomain::type, _WlzCoreValues::type, _WlzVoxelValues::type, _WlzGreyV::ubv, _WlzPixelV::v, _WlzValues::v, _WlzObject::values, _WlzVoxelValues::values, _WlzValues::vox, WLZ_2D_DOMAINOBJ, WLZ_3D_DOMAINOBJ, WLZ_EMPTY_OBJ, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_GREY_TYPE, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_ERR_PLANEDOMAIN_TYPE, WLZ_ERR_VALUES_NULL, WLZ_ERR_VOXELVALUES_TYPE, WLZ_GREY_DOUBLE, WLZ_GREY_FLOAT, WLZ_GREY_INT, WLZ_GREY_SHORT, WLZ_GREY_TAB_RAGR, WLZ_GREY_UBYTE, WLZ_PLANEDOMAIN_DOMAIN, WLZ_TRANS_OBJ, WLZ_VOXELVALUETABLE_GREY, WlzAssignValues(), WlzFreeObj(), WlzGetBackground(), WlzGreyTableTypeToGreyType(), WlzGreyValueTableType(), WlzMakeEmpty(), WlzMakeMain(), WlzMakeVoxelValueTb(), WlzNewValueTb(), and WlzScalarBinaryOp().

Referenced by WlzScalarAdd(), WlzScalarDivide(), WlzScalarMultiply(), and WlzScalarSubtract().

WlzObject* WlzScalarAdd	(	WlzObject *	o1,
		WlzPixelV	pval,
		WlzErrorNum *	dstErr
	)

Add a value to each pixel of an object.

Returns

Object with value added to each pixel.

Parameters

o1	Input object
pval	Value to be added.
dstErr	Error return.

References WLZ_BO_ADD, and WlzScalarBinaryOp2().

WlzObject* WlzScalarSubtract	(	WlzObject *	o1,
		WlzPixelV	pval,
		WlzErrorNum *	dstErr
	)

Subtract a value from each pixel of an object.

Returns

Object with value subtacted from each pixel.

Parameters

o1	Input object
pval	Value to be subtracted.
dstErr	Error return.

References WLZ_BO_SUBTRACT, and WlzScalarBinaryOp2().

WlzObject* WlzScalarMultiply	(	WlzObject *	o1,
		WlzPixelV	pval,
		WlzErrorNum *	dstErr
	)

Multiply each pixel of an object.

Returns

Object with multiplied pixel values.

Parameters

o1	Input object
pval	Multiplication factor.
dstErr	Error return.

Source:

WlzScalarArithmeticOp.c

References WLZ_BO_MULTIPLY, and WlzScalarBinaryOp2().

Referenced by WlzNObjGreyStats().

WlzObject* WlzScalarDivide	(	WlzObject *	o1,
		WlzPixelV	pval,
		WlzErrorNum *	dstErr
	)

Divide each pixel of an object.

Returns

Object with each pixel divided.

Parameters

o1	Input object
pval	Division value.
dstErr	Error return.

Source:

WlzScalarArithmeticOp.c

References WLZ_BO_DIVIDE, and WlzScalarBinaryOp2().

WlzObject* WlzScalarMulAdd	(	WlzObject *	iObj,
		WlzPixelV	m,
		WlzPixelV	a,
		WlzGreyType	rGType,
		WlzErrorNum *	dstErr
	)

Scales the values of the given Woolz object so that \(v_{new} = m v_{given} + a.\).

Returns

New woolz object or NULL on error.

Parameters

iObj	Given object.
m	Value to multiply object values by.
a	Value to add to product.
rGType	Required grey type for returned object.
dstErr	Destination error pointer, may be NULL.

References AlcFree(), AlcMalloc(), _WlzObject::assoc, _WlzIntervalWSpace::colrmn, _WlzValues::core, _WlzDomain::core, _WlzGreyP::dbp, _WlzGreyV::dbv, _WlzObject::domain, _WlzPlaneDomain::domains, _WlzGreyP::flp, _WlzDomain::i, _WlzGreyP::inp, _WlzIntervalDomain::kol1, _WlzIntervalDomain::lastkl, _WlzPlaneDomain::lastpl, _WlzCompoundArray::n, _WlzCompoundArray::o, _WlzDomain::p, _WlzGreyWSpace::pixeltype, _WlzPlaneDomain::plane1, _WlzObject::plist, _WlzGreyP::rgbp, _WlzGreyP::shp, _WlzObject::type, _WlzRagRValues::type, _WlzGreyWSpace::u_grintptr, _WlzGreyP::ubp, _WlzPixelV::v, _WlzValues::v, _WlzObject::values, _WlzVoxelValues::values, _WlzValues::vox, WLZ_2D_DOMAINOBJ, WLZ_3D_DOMAINOBJ, WLZ_CLAMP, WLZ_COMPOUND_ARR_1, WLZ_ERR_DOMAIN_DATA, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_EOO, WLZ_ERR_GREY_TYPE, WLZ_ERR_MEM_ALLOC, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_ERR_VALUES_NULL, WLZ_GREY_DOUBLE, WLZ_GREY_FLOAT, WLZ_GREY_INT, WLZ_GREY_RGBA, WLZ_GREY_SHORT, WLZ_GREY_TAB_RAGR, WLZ_GREY_UBYTE, WLZ_NINT, WLZ_NULL, WLZ_RGBA_RGBA_SET, WlzAssignValues(), WlzEndGreyScan(), WlzFreeObj(), WlzFreeValueTb(), WlzFreeVoxelValueTb(), WlzGetBackground(), WlzGreyTableTypeToTableType(), WlzGreyValueTableType(), WlzInitGreyScan(), WlzMakeCompoundArray(), WlzMakeMain(), WlzNewValuesVox(), WlzNewValueTb(), WlzNextGreyInterval(), WlzValueConvertPixel(), WlzValueCopyDoubleToDouble(), WlzValueCopyFloatToDouble(), WlzValueCopyIntToDouble(), WlzValueCopyRGBAToDouble(), WlzValueCopyShortToDouble(), and WlzValueCopyUByteToDouble().

Referenced by WlzEffReadObjNifti().

WlzErrorNum WlzScalarBinaryOp	(	WlzObject *	o1,
		WlzPixelV	pval,
		WlzObject *	o3,
		WlzBinaryOperatorType	op
	)

Perform the given binary operation for each grey value in image o1 with val putting the result in o3. The value table of o3 can be identical to that of o1 to allow overwriting. This function assumes that the domains of each object are the same. Unless overwriting is required then the functions WlzImageAdd, WlzImageSubtract etc. should be used. These return an object which is the intersection of the input objects.

Returns

Woolz error.

Parameters

o1	Input object.
pval	Operand value.
o3	Oject for the return values. Setting equal to o1 means values will be overwritten.
op	Opertor to be applied.

Source:

WlzScalarBinaryOp.c

References AlcFree(), AlcMalloc(), _WlzIntervalWSpace::colrmn, _WlzValues::core, _WlzDomain::core, _WlzGreyP::dbp, _WlzGreyV::dbv, _WlzObject::domain, _WlzPlaneDomain::domains, _WlzGreyP::flp, _WlzGreyV::flv, _WlzGreyP::inp, _WlzIntervalWSpace::intdmn, _WlzGreyV::inv, _WlzIntervalDomain::kol1, _WlzIntervalDomain::lastkl, _WlzPlaneDomain::lastpl, _WlzValues::obj, _WlzPixelP::p, _WlzDomain::p, _WlzGreyWSpace::pixeltype, _WlzPlaneDomain::plane1, _WlzGreyP::shp, _WlzGreyV::shv, _WlzPixelV::type, _WlzPixelP::type, _WlzObject::type, _WlzPlaneDomain::type, _WlzCoreValues::type, _WlzVoxelValues::type, _WlzGreyWSpace::u_grintptr, _WlzGreyP::ubp, _WlzGreyV::ubv, _WlzGreyP::v, _WlzPixelV::v, _WlzObject::values, _WlzVoxelValues::values, _WlzValues::vox, WLZ_2D_DOMAINOBJ, WLZ_3D_DOMAINOBJ, WLZ_EMPTY_OBJ, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_DOMAIN_TYPE, WLZ_ERR_EOO, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_ERR_PLANEDOMAIN_TYPE, WLZ_ERR_VALUES_NULL, WLZ_ERR_VALUES_TYPE, WLZ_ERR_VOXELVALUES_TYPE, WLZ_GREY_DOUBLE, WLZ_GREY_ERROR, WLZ_GREY_FLOAT, WLZ_GREY_INT, WLZ_GREY_SHORT, WLZ_GREY_UBYTE, WLZ_PLANEDOMAIN_DOMAIN, WLZ_TRANS_OBJ, WLZ_VOXELVALUETABLE_GREY, WlzFreeObj(), WlzGreyTableIsTiled(), WlzInitGreyScan(), WlzMakeMain(), and WlzNextGreyInterval().

Referenced by WlzRGBAScalarBinaryOp(), and WlzScalarBinaryOp2().

WlzObject* WlzScalarFn	(	WlzObject *	sObj,
		WlzFnType	fn,
		WlzErrorNum *	dstErr
	)

Computes a new object which shares the domain of the given object, but which has grey values that are the result of applying the given function to the grey values of the given object.

Returns

New domain object.

Parameters

sObj	Given source domainn object with values.
fn	Scalar function to be applied.
dstErr	Destination error pointer, may be NULL.

References _WlzValues::core, _WlzDomain::core, _WlzGreyP::dbp, _WlzGreyV::dbv, _WlzObject::domain, _WlzPlaneDomain::domains, _WlzGreyP::flp, _WlzGreyV::flv, _WlzGreyP::inp, _WlzGreyV::inv, _WlzPlaneDomain::lastpl, _WlzIntervalWSpace::lftpos, _WlzGreyP::lnp, _WlzGreyV::lnv, _WlzDomain::p, _WlzPlaneDomain::plane1, _WlzGreyP::rgbp, _WlzGreyV::rgbv, _WlzIntervalWSpace::rgtpos, _WlzGreyP::shp, _WlzGreyV::shv, _WlzPixelV::type, _WlzObject::type, _WlzGreyWSpace::u_grintptr, _WlzGreyP::ubp, _WlzGreyV::ubv, _WlzPixelV::v, _WlzValues::v, _WlzObject::values, _WlzVoxelValues::values, _WlzValues::vox, WLZ_2D_DOMAINOBJ, WLZ_3D_DOMAINOBJ, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_EOO, WLZ_ERR_GREY_TYPE, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_ERR_PARAM_DATA, WLZ_ERR_VALUES_NULL, WLZ_FN_SCALAR_EXP, WLZ_FN_SCALAR_INVSQRT, WLZ_FN_SCALAR_LOG, WLZ_FN_SCALAR_MOD, WLZ_FN_SCALAR_SQR, WLZ_FN_SCALAR_SQRT, WLZ_GREY_DOUBLE, WLZ_GREY_ERROR, WLZ_GREY_FLOAT, WLZ_GREY_INT, WLZ_GREY_LONG, WLZ_GREY_RGBA, WLZ_GREY_SHORT, WLZ_GREY_TAB_RAGR, WLZ_GREY_UBYTE, WLZ_VOXELVALUETABLE_GREY, WlzAssignValues(), WlzFreeObj(), WlzGetBackground(), WlzGreyTypeFromObj(), WlzGreyValueTableType(), WlzInitGreyScan(), WlzMakeMain(), WlzMakeVoxelValueTb(), WlzNewValueTb(), WlzNextGreyInterval(), WlzValueConvertPixel(), and WlzValueCopyGreyToGrey().

Referenced by WlzNObjGreyStats(), and WlzSepFilter().