Doxygen Source Code Documentation
mcrawl.c File Reference
#include "mrilib.h"Go to the source code of this file.
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| int | main (int argc, char *argv[]) |
Function Documentation
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\** File : SUMA.c
Input paramters :
Definition at line 3 of file mcrawl.c. References argc, DSET_ARRAY, DSET_BRICK_TYPE, DSET_load, DSET_LOADED, DSET_NVOX, DSET_unload, ISVALID_DSET, strtod(), and THD_open_dataset().
00004 {
00005 float mfrac=0.50 ;
00006 double dsum ;
00007 int nvox , iarg=1 , hist[32768] , ii,npos=0 , ncut,nmed,kk,ib , qq,nold ;
00008 THD_3dim_dataset * dset ;
00009 short * sar ;
00010
00011 if( argc < 2 || strcmp(argv[1],"-help") == 0 ){
00012 printf("Usage: mcrawl [-mfrac x] dataset\n"); exit(0);
00013 }
00014
00015 if( strcmp(argv[iarg],"-mfrac") == 0 ){
00016 mfrac = strtod( argv[++iarg] , NULL ) ;
00017 if( mfrac <= 0.0 ){ fprintf(stderr,"ILLEGAL -mfrac\n");exit(1);}
00018 if( mfrac >= 1.0 ) mfrac *= 0.01 ;
00019 iarg++ ;
00020 }
00021
00022 dset = THD_open_dataset(argv[iarg]) ;
00023 if( !ISVALID_DSET(dset) ){ fprintf(stderr,"CAN'T open dataset\n");exit(1);}
00024 if( DSET_BRICK_TYPE(dset,0) != MRI_short ){ fprintf(stderr,"ILLEGAL dataset type\n");exit(1); }
00025 DSET_load(dset) ;
00026 if( !DSET_LOADED(dset) ){ fprintf(stderr,"CAN'T load dataset\n");exit(1);}
00027 sar = DSET_ARRAY(dset,0) ;
00028
00029 nvox = DSET_NVOX(dset) ;
00030 memset( hist , 0 , sizeof(int)*32768 ) ;
00031
00032 dsum = 0.0 ;
00033 for( ii=0 ; ii < nvox ; ii++ ){
00034 if( sar[ii] > 0 ){
00035 hist[sar[ii]]++ ; dsum += (double)(sar[ii])*(double)(sar[ii]) ; npos++ ;
00036 }
00037 }
00038
00039 DSET_unload(dset) ;
00040
00041 printf("npos = %d\n",npos) ; if( npos <= 99 ) exit(1) ;
00042
00043 qq = 0.65 * npos ; ib = rint(0.5*sqrt(dsum/npos)) ;
00044 for( kk=0,ii=32767 ; ii >= ib && kk < qq ; ii-- ) kk += hist[ii] ;
00045
00046 ncut = ii ; qq = 0 ;
00047 do{
00048 for( npos=0,ii=ncut ; ii < 32768 ; ii++ ) npos += hist[ii] ;
00049 npos /= 2 ; /* find median */
00050 for( kk=0,ii=ncut ; ii < 32768 && kk < npos ; ii++ ) kk += hist[ii] ;
00051 printf("ncut=%d ii=%d kk=%d\n",ncut,ii,kk) ;
00052 nold = ncut ;
00053 ncut = mfrac * ii ;
00054 qq++ ;
00055 } while( qq < 20 && ncut != nold ) ;
00056
00057 exit(0) ;
00058 }
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