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slider.c
Go to the documentation of this file.00001 #include "mrilib.h"
00002
00003 int main( int argc , char * argv[] )
00004 {
00005 MRI_IMAGE * inim , * outim ;
00006 byte * inby , * outby ;
00007 int ii , nx,ny , npix ;
00008 byte rr,gg,bb ;
00009
00010 if( argc < 3 ){
00011 printf("Usage: slider infile.ppm outfile.ppm\n") ;
00012 exit(0) ;
00013 }
00014
00015 inim = mri_read_ppm( argv[1] ) ;
00016 if( inim == NULL ){
00017 fprintf(stderr,"Cannot read input file!\n") ;
00018 exit(1) ;
00019 }
00020
00021 inby = MRI_RGB_PTR(inim) ;
00022 nx = inim->nx ; ny = inim->ny ; npix = nx * ny ;
00023
00024 outim = mri_new( nx , ny , MRI_rgb ) ;
00025 outby = MRI_RGB_PTR(outim) ;
00026
00027 for( ii=0 ; ii < 3*npix ; ii+=3 ){
00028
00029 rr = inby[ii] ; gg = inby[ii+1] ; bb = inby[ii+2] ;
00030
00031 if( rr==255 && gg==255 && bb==255 ){
00032 rr = 0 ; gg = 0 ; bb = 111 ;
00033 } else if( rr==143 && gg==143 && bb > 200 ){
00034 rr = 255 ; gg = 255 ; bb = 0 ;
00035 }
00036
00037 outby[ii] = rr ; outby[ii+1] = gg ; outby[ii+2] = bb ;
00038 }
00039
00040 mri_write_pnm( argv[2] , outim ) ;
00041 exit(0) ;
00042 }
