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imrotate.c
Go to the documentation of this file.00001
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00007 #include "mrilib.h"
00008 #include <string.h>
00009
00010 int main( int argc , char *argv[] )
00011 {
00012 MRI_IMAGE *imin , *imwarp ;
00013 float aa , bb , phi ;
00014 char * cp ;
00015 int kk , nopt , almode = MRI_BICUBIC ;
00016
00017 if( argc < 6 || strncmp(argv[1],"-help",5) == 0 ){
00018 printf( "Usage: imrotate [-linear | -Fourier] dx dy phi input_image output_image\n"
00019 "Shifts and rotates an image:\n"
00020 " dx pixels rightwards (not necessarily an integer)\n"
00021 " dy pixels downwards\n"
00022 " phi degrees clockwise\n"
00023 " -linear means to use bilinear interpolation (default is bicubic)\n"
00024 " -Fourier means to use Fourier interpolaion\n"
00025 "Values outside the input_image are taken to be zero.\n" ) ;
00026 exit(0) ;
00027 }
00028
00029 machdep() ;
00030
00031
00032
00033 #define ERR fprintf(stderr,"Illegal parameter!\n")
00034
00035 nopt = 1 ;
00036 if( strncmp(argv[nopt],"-linear",4) == 0 ){
00037 almode = MRI_BILINEAR ;
00038 nopt++ ;
00039 } else if( strncmp(argv[nopt],"-Fourier",4) == 0 ){
00040 almode = MRI_FOURIER ;
00041 nopt++ ;
00042 }
00043
00044 aa = strtod( argv[nopt++] , &cp ) ; if( *cp != '\0' ){ERR;exit(1);}
00045 bb = strtod( argv[nopt++] , &cp ) ; if( *cp != '\0' ){ERR;exit(1);}
00046 phi = strtod( argv[nopt++] , &cp ) * (PI/180.0) ; if( *cp != '\0' ){ERR;exit(1);}
00047
00048 imin = mri_read_just_one( argv[nopt++] ) ;
00049 if( imin == NULL ) exit(1) ;
00050 if( ! MRI_IS_2D(imin) ){
00051 fprintf(stderr,"** Input image is not 2D!\a\n") ; exit(1) ;
00052 }
00053
00054 kk = imin->kind ;
00055
00056 imwarp = mri_rota_variable( almode , imin,aa,bb,phi ) ;
00057
00058 mri_free( imin ) ;
00059
00060 switch( kk ){
00061 case MRI_byte: imin = mri_to_byte( imwarp ) ; break ;
00062 case MRI_short: imin = mri_to_short( 1.0 , imwarp ) ; break ;
00063 default: imin = mri_to_float( imwarp ) ; break ;
00064 case MRI_float: imin = imwarp ; break ;
00065 case MRI_complex: imin = imwarp ; break ;
00066 }
00067
00068 mri_write( argv[nopt++] , imin ) ;
00069 exit(0) ;
00070 }
