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/*
* Project: The SPD Image correction and azimuthal regrouping
* http://forge.epn-campus.eu/projects/show/azimuthal
*
* Copyright (C) 2005-2010 European Synchrotron Radiation Facility
* Grenoble, France
*
* Principal authors: P. Boesecke (boesecke@esrf.fr)
* R. Wilcke (wilcke@esrf.fr)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU Lesser General Public License along with this program.
* If not, see <http://www.gnu.org/licenses/>.
*/
/*+++***********************************************************************
NAME
ipol.h
SYNOPSIS
#include "ipol.h"
DESCRIPTION
Header of the module "ipol.c"
The header contains the following standard definitions:
Array element access: ABSPTR, NEXTCOL, NEXTROW, NEXTCOLROW
Dummy value definitions: MinDDummy, AccDummy, VarDummy
Dummy value macros: DDSET, DUMMYDEFINED, NODUMMYDEFINED,
DUMMY, NODUMMY, UPDATE
Functions for linear two dimensional interpolation/integration:
Isum2ldwE --- Area integral (+dummies, +limit checks, +weight, +variance)
Isum2ldw --- Area integral (+dummies, +limit checks, +weight)
Ipol2ldw --- Area interpolation (+dummies, +limit checks, +weight)
Ipol2ld --- Area interpolation (+dummies, +limit checks)
Ipol2 --- Area interpolation (-dummies, -limit checks)
Ipolmin --- set/return minimum accepted coverage ratio
Ipolmode --- set/return interpolation mode
Ipolmode2str --- return interpolation mode string
Ipolweight --- set/return weighting method
Ipolweight2str --- return weighting method string
IpolRebin2 --- rebinning of an array
***********************************************************************---*/
#ifndef _IPOL_
/***************************************************************************
* General Definitions *
***************************************************************************/
#ifndef PRIVATE
# define PRIVATE static /* used to declare variables of private type */
# define PUBLIC /* used to declare variables of public type */
#endif
# include <stdio.h>
# include <stdlib.h>
# include <limits.h>
# include <errno.h>
# include <stdio.h>
# include <fcntl.h>
# include <math.h>
# include <float.h>
/***************************************************************************
* MACROS *
***************************************************************************/
/*---------------------------------------------------------------------------
The constant IPOLEPS defines the interval around an array element in which
no interpolation takes place.
---------------------------------------------------------------------------*/
# define IPOLEPS 1e-4
/*---------------------------------------------------------------------------
The constants IPOL_NORMAL and IPOL_ANTIALIASED are used to set the
interpolation mode with the routine Ipolmod.
---------------------------------------------------------------------------*/
# define IPOL_NORMAL 1
# define IPOL_ANTIALIASED 2
/*---------------------------------------------------------------------------
The constants IPOL_EQUAL and IPOL_WEIGHTED are used to set the
weight mode with the routine Ipolweight
---------------------------------------------------------------------------*/
# define IPOL_EQUAL 4
# define IPOL_WEIGHTED 8
/*---------------------------------------------------------------------------
Some internal macros
---------------------------------------------------------------------------*/
# define IPOL_ABS( x) ( ( x)> 0 ? ( x) : -( x) )
# define IPOL_MAX2( x1, x2) ( ( x1)>( x2) ? ( x1) : ( x2) )
# define IPOL_MIN2( n1, n2) ( ( n1)<( n2) ? ( n1) : ( n2) )
/*---------------------------------------------------------------------------
IDX
Calculation of the integer part and the rest of a float pixel index.
IDX calculates to the float value f the closest integer number I less
than f and the difference R = f - (float) I.
Usage :
float f; int I; float R;
IDX( f, I, R );
---------------------------------------------------------------------------*/
#define IDX(f,I,R) (I)=floor(f);(R)=(f)-(float)(I)
/*---------------------------------------------------------------------------
The following macros calcuate the pointers to array elements.
- ABSPTR calculates the pointer to the array element (column=i_1, row=i_2)
from the base Data of the array.
The next three macros are used for interpolation between neighbouring data
point.
-NEXTCOL returns the pointer to the element in the next column
of the same row
-NEXTROW returns the pointer to the element in the next row
of the same column
-NEXTCOLROW returns the pointer to the element in the next column
of the next row.
Usage:
<dtype> Data[Dim_1,Dim_2] : <dtype> array of size Dim_1,Dim_2;
int i_1,i_2 : array indices
<dtype> *pdata, *pvalnxtcoli, *pvalnxtrow, *pvalnxtcolrow;
pdata = ABSPTR(Data,Dim_1,Dim_2,i_1,i_2);
pvalnxtcol = NEXTCOL(pdata,Dim_1,Dim_2);
pvalnxtrow = NEXTROW(pdata,Dim_1,Dim_2);
pvalnxtcolrow = NEXTCOLROW(pdata,Dim_1,Dim_2);
---------------------------------------------------------------------------*/
#define ABSPTR(A,D1,D2,I1,I2) (A)+((I1)+((I2)*(D1)))
#define NEXTCOL(pA,D1,D2) (pA)+1
#define NEXTROW(pA,D1,D2) (pA)+(D1)
#define NEXTCOLROW(pA,D1,D2) (pA)+(1+(D1))
/*----------------------------------------------------------------------------
Dummy Value Definitions
MinDDummy minimum possible value for DDummy
AccDummy relative accuracy
VarDummy unchangeable dummy value of variance array
DDSET(Dummy) calculation of a good DDummy value to Dummy
DUMMY(Value, Dummy, DDummy) TRUE if value is a Dummy
NODUMMY(Value, Dummy, DDummy) TRUE if value is not a Dummy
UPDATE(Destination,Value,Dummy,DDummy) adds Value to Destination if not Dummy
Usage:
DDummy = DDSET(Dummy);
if DUMMYDEFINED (Dummy, DDummy) ...
if DUMMY(Value, Dummy, DDummy) { do something } else { do something else };
if NODUMMY(Value, Dummy, DDummy) { do something } else { do something else };
UPDATE( Destination, Value, Dummy, DDummy);
---------------------------------------------------------------------------*/
# define MinDDummy 0.1
# define AccDummy 1e-5
# define VarDummy -1.0
# define DDSET(D) IPOL_MAX2(MinDDummy,IPOL_ABS(D)*AccDummy)
# define DUMMYDEFINED( D, DD) ((IPOL_ABS(D)>IPOL_MAX2(DD,MinDDummy)) ? 1 : 0)
# define NODUMMYDEFINED(D, DD) ((IPOL_ABS(D)>IPOL_MAX2(DD,MinDDummy)) ? 0 : 1)
# define DUMMY( V, D, DD) ((IPOL_ABS((V)-(D))<=DD)&&DUMMYDEFINED(D,DD))
# define NODUMMY( V, D, DD) ((IPOL_ABS((V)-(D))>DD)||NODUMMYDEFINED(D,DD))
# define UPDATE( DE, V, D, DD) if (DUMMY(DE,(D),(DD))) DE=(V); else DE+=(V)
/***************************************************************************
* Functions *
***************************************************************************/
PUBLIC extern void
Ipol2 ( float *Data, int Dim_1, int Dim_2,
float f_1, float f_2, float *value),
IpolRebin2 ( float *Data, int Dim_1, int Dim_2,
float *DataOut, int *pOutDim_1, int *pOutDim_2,
float Dummy, float DDummy,
int Bin_1, int Bin_2, int Average );
PUBLIC extern int
Isum2ldwE ( float *Data, float *VarDat, int Dim_1, int Dim_2,
float Dummy, float DDummy,
float f1_1, float f1_2, float f3_1, float f3_2,
float *sum, float *weight,
float *varsum, float *varweight),
Isum2ldw ( float *Data, int Dim_1, int Dim_2,
float Dummy, float DDummy,
float f1_1, float f1_2, float f3_1, float f3_2,
float *sum, float *weight),
Ipol2ldw ( float *Data, int Dim_1, int Dim_2,
float Dummy, float DDummy,
float f_1, float f_2, float *sum, float *weight),
Ipol2ld ( float *Data, int Dim_1, int Dim_2,
float Dummy, float DDummy,
float f_1, float f_2, float *value),
Ipol2d ( float *Data, int Dim_1, int Dim_2,
float Dummy, float DDummy,
float f_1, float f_2, float *value);
PUBLIC extern float
Ipolmin ( float minimum );
PUBLIC extern int
Ipolmode ( int mode ),
Ipolweight ( int method );
PUBLIC extern const char
*Ipolmode2str ( int mode ),
*Ipolweight2str ( int method );
# define _IPOL_
#endif /* _IPOL_ */
/****************************************************************************
* *
****************************************************************************/
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