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/*********************************************************************
Segment - Segment initial labels based on signal structure.
Segment is part of GNU Astronomy Utilities (Gnuastro) package.
Original author:
Mohammad Akhlaghi <mohammad@akhlaghi.org>
Contributing author(s):
Copyright (C) 2015-2025 Free Software Foundation, Inc.
Gnuastro is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
Gnuastro 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with Gnuastro. If not, see <http://www.gnu.org/licenses/>.
**********************************************************************/
#ifndef CLUMPS_H
#define CLUMPS_H
/* Parameters for all threads. */
struct clumps_params
{
/* General */
int step; /* Counter if we want to check steps. */
int sky0_det1; /* If working on the Sky or Detections. */
struct segmentparams *p; /* Pointer to main Segment parameters. */
pthread_mutex_t labmutex; /* Mutex to change the total numbers. */
/* For Sky region. */
gal_data_t *sn; /* Array of clump S/N tables. */
gal_data_t *snind; /* Array of clump S/N index (for check). */
/* For detections. */
gal_data_t *labindexs; /* Array of 'gal_data_t' with obj indexs. */
size_t totobjects; /* Total number of objects at any point. */
size_t totclumps; /* Total number of clumps at any point. */
};
/* Parameters for one thread (a tile or a detected region). */
struct clumps_thread_params
{
size_t id; /* ID of this detection/tile over tile. */
size_t *topinds; /* Indexs of all local maxima. */
size_t numinitclumps; /* Number of clumps in tile/detection. */
size_t numtrueclumps; /* Number of true clumps in tile/detection.*/
size_t numobjects; /* Number of objects over this clump. */
float std; /* Standard deviation of noise on center. */
gal_data_t *indexs; /* Array containing indexs of this det. */
gal_data_t *diffuseindexs; /* Diffuse region (after finding clumps). */
gal_data_t *info; /* Information for all clumps. */
gal_data_t *sn; /* Signal-to-noise ratio for these clumps. */
gal_data_t *snind; /* Index of S/N for these clumps. */
gal_data_t *clumptoobj; /* Index of object that a clump belongs to.*/
struct clumps_params *clprm; /* Pointer to main structure. */
};
void
clumps_grow_prepare_initial(struct clumps_thread_params *cltprm);
void
clumps_grow_prepare_final(struct clumps_thread_params *cltprm);
void
clumps_grow(gal_data_t *labels, gal_data_t *diffuseindexs, int withrivers,
int connectivity);
void
clumps_true_find_sn_thresh(struct segmentparams *p);
void
clumps_make_sn_table(struct clumps_thread_params *cltprm);
gal_data_t *
clumps_det_label_indexs(struct segmentparams *p);
void
clumps_det_keep_true_relabel(struct clumps_thread_params *cltprm);
#endif
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