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mri_scalize.c File Reference
#include "mrilib.h"Go to the source code of this file.
Functions | |
| MRI_IMAGE * | mri_scalize (MRI_IMAGE *inim, int kind, float *sfac) |
Function Documentation
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Scale a float image to an integer type [20 Oct 2003]:
Definition at line 10 of file mri_scalize.c. References EDIT_coerce_scale_type(), ENTRY, MRI_IMAGE::kind, MCW_vol_amax(), MRI_IS_INT_TYPE, mri_new_conforming, MRI_IMAGE::nvox, and RETURN. Referenced by THD_warp3D().
00011 {
00012 float gtop , fac , fimfac ;
00013 MRI_IMAGE *outim ;
00014
00015 ENTRY("mri_scalize") ;
00016
00017 if( inim == NULL ||
00018 inim->kind != MRI_float ||
00019 sfac == NULL ||
00020 !MRI_IS_INT_TYPE(kind) ) RETURN(NULL) ;
00021
00022 fac = *sfac ; if( fac < 0.0 ) fac = 0.0 ;
00023
00024 gtop = MCW_vol_amax( inim->nvox,1,1,MRI_float,MRI_FLOAT_PTR(inim) ) ;
00025 if( gtop == 0.0 ){
00026 fimfac = fac ;
00027 } else {
00028 fimfac = gtop / MRI_TYPE_maxval[kind] ;
00029 if( fimfac < fac ) fimfac = fac ;
00030 }
00031 outim = mri_new_conforming( inim , kind ) ;
00032 if( fimfac > 0.0 )
00033 EDIT_coerce_scale_type( inim->nvox , 1.0/fimfac ,
00034 MRI_float , MRI_FLOAT_PTR(inim) ,
00035 outim->kind , mri_data_pointer(outim) ) ;
00036 *sfac = fimfac ; RETURN(outim) ;
00037 }
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