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/*
profit.c
*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
*
* Part of: SExtractor
*
* Authors: E.BERTIN (IAP)
*
* Contents: Fit an arbitrary profile combination to a detection.
*
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*
*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_MATHIMF_H
#include <mathimf.h>
#else
#define _GNU_SOURCE
#include <math.h>
#endif
#ifdef HAVE_LOGF
#define LOGF logf
#else
#define LOGF log
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "define.h"
#include "globals.h"
#include "prefs.h"
#include "fits/fitscat.h"
#include "levmar/lm.h"
#include "fft.h"
#include "fitswcs.h"
#include "check.h"
#include "pattern.h"
#include "psf.h"
#include "profit.h"
static double prof_interpolate(profstruct *prof, double *posin);
static double interpolate_pix(double *posin, double *pix, int *naxisn,
interpenum interptype);
static void make_kernel(double pos, double *kernel, interpenum interptype);
/*------------------------------- variables ---------------------------------*/
char profname[][32]={"background offset", "Sersic spheroid",
"De Vaucouleurs spheroid", "exponential disk", "spiral arms",
"bar", "inner ring", "outer ring", "tabulated model",
""};
int interp_kernwidth[5]={1,2,4,6,8};
int theniter, the_gal;
/* "Local" global variables; it seems dirty but it simplifies a lot */
/* interfacing to the LM routines */
static picstruct *the_field, *the_wfield;
profitstruct *theprofit;
/****** profit_init ***********************************************************
PROTO profitstruct profit_init(psfstruct *psf)
PURPOSE Allocate and initialize a new profile-fitting structure.
INPUT Pointer to PSF structure.
OUTPUT A pointer to an allocated profit structure.
NOTES -.
AUTHOR E. Bertin (IAP)
VERSION 26/04/2008
***/
profitstruct *profit_init(psfstruct *psf)
{
profitstruct *profit;
int p, nprof,
backflag, spheroidflag, diskflag, barflag, armsflag;
QCALLOC(profit, profitstruct, 1);
profit->psf = psf;
profit->psfdft = NULL;
profit->nparam = 0;
QMALLOC(profit->prof, profstruct *, PROF_NPROF);
backflag = spheroidflag = diskflag = barflag = armsflag = 0;
nprof = 0;
for (p=0; p<PROF_NPROF; p++)
if (!backflag && FLAG(obj2.prof_offset_flux))
{
profit->prof[p] = prof_init(profit, PROF_BACK);
backflag = 1;
nprof++;
}
else if (!spheroidflag && FLAG(obj2.prof_spheroid_flux))
{
profit->prof[p] = prof_init(profit,
FLAG(obj2.prof_spheroid_sersicn)? PROF_SERSIC : PROF_DEVAUCOULEURS);
spheroidflag = 1;
nprof++;
}
else if (!diskflag && FLAG(obj2.prof_disk_flux))
{
profit->prof[p] = prof_init(profit, PROF_EXPONENTIAL);
diskflag = 1;
nprof++;
}
else if (diskflag && !barflag && FLAG(obj2.prof_bar_flux))
{
profit->prof[p] = prof_init(profit, PROF_BAR);
barflag = 1;
nprof++;
}
else if (barflag && !armsflag && FLAG(obj2.prof_arms_flux))
{
profit->prof[p] = prof_init(profit, PROF_ARMS);
armsflag = 1;
nprof++;
}
QMALLOC(profit->covar, double, profit->nparam*profit->nparam);
profit->nprof = nprof;
return profit;
}
/****** profit_end ************************************************************
PROTO void prof_end(profstruct *prof)
PURPOSE End (deallocate) a profile-fitting structure.
INPUT Prof structure.
OUTPUT -.
NOTES -.
AUTHOR E. Bertin (IAP)
VERSION 26/04/2008
***/
void profit_end(profitstruct *profit)
{
int p;
for (p=0; p<profit->nprof; p++)
prof_end(profit->prof[p]);
free(profit->prof);
free(profit->covar);
free(profit->psfdft);
free(profit);
return;
}
/****** profit_fit ************************************************************
PROTO void profit_fit(profitstruct *profit, picstruct *field,
picstruct *wfield, objstruct *obj, obj2struct *obj2)
PURPOSE Fit profile(s) convolved with the PSF to a detected object.
INPUT Array of profile structures,
Number of profiles,
Pointer to the profile-fitting structure,
Pointer to the field,
Pointer to the field weight,
Pointer to the obj.
OUTPUT Pointer to an allocated fit structure (containing details about the
fit).
NOTES It is a modified version of the lm_minimize() of lmfit.
AUTHOR E. Bertin (IAP)
***/
void profit_fit(profitstruct *profit,
picstruct *field, picstruct *wfield,
objstruct *obj, obj2struct *obj2)
{
profitstruct pprofit;
patternstruct *pattern;
psfstruct *psf;
checkstruct *check;
double psf_fwhm, a , cp,sp, emx2,emy2,emxy, dchi2, err;
int i,j,p, nparam, ncomp, nprof;
nprof = profit->nprof;
if (profit->psfdft)
{
QFREE(profit->psfdft);
}
psf = profit->psf;
profit->pixstep = psf->pixstep;
/* Create pixmaps at image resolution */
psf_fwhm = psf->masksize[0]*psf->pixstep;
profit->objnaxisn[0] = (((int)((obj->xmax-obj->xmin+1) + psf_fwhm + 0.499)
*1.2)/2)*2 + 1;
profit->objnaxisn[1] = (((int)((obj->ymax-obj->ymin+1) + psf_fwhm + 0.499)
*1.2)/2)*2 + 1;
profit->ix = (int)(obj->mx + 0.49999);/* internal convention: 1st pix = 0 */
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