fmi_image_filter_line.c

 
#include "fmi_util.h"
#include "fmi_image.h"
#include "fmi_image_filter.h"
#include "fmi_image_filter_line.h"
 
/* source = VALUE TO BE PROPAGATED; IF NULL VALUE=1*/
/* mask = control image */
 
 
void detect_horz_line_segments(FmiImage *target,FmiImage *trace,unsigned char min_length,unsigned char min_elevation){
 
  detect_vert_maxima(target,trace); /* fmi_image_filter.h */
  if (FMI_DEBUG(1)) write_image("maxima",trace,PGM_RAW);
 
  /* fmi_image_filter.h */
  mask_image(trace,trace,min_elevation,0); 
  if (FMI_DEBUG(1)) write_image("maxima2",trace,PGM_RAW);
 
  /* go right, measure segment length... */
  propagate_right(NULL,trace,trace,1,put_pixel);   
  if (FMI_DEBUG(1)) write_image("prop",trace,PGM_RAW);
 
  /* ...and spread it back left */
  propagate_left(trace,trace,trace,0,put_pixel);  
  if (FMI_DEBUG(1)) write_image("prop2",trace,PGM_RAW);
 
  mask_image(trace,trace,min_length,0); 
}
  
void detect_horz_edge_segments(FmiImage *target,FmiImage *trace,unsigned char min_length,unsigned char min_elevation){
  
  detect_horz_edges(target,trace); /* fmi_image_filter.h */
  if (FMI_DEBUG(1)) write_image("maxima",trace,PGM_RAW);
 
  /* fmi_image_filter.h */
  mask_image(trace,trace,min_elevation,0); 
  if (FMI_DEBUG(1)) write_image("maxima2",trace,PGM_RAW);
 
  /* go right, measure segment length... */
  propagate_right(NULL,trace,trace,1,put_pixel);   
  if (FMI_DEBUG(1)) write_image("prop",trace,PGM_RAW);
 
  /* ...and spread it back left */
  propagate_left(trace,trace,trace,0,put_pixel);  
  if (FMI_DEBUG(1)) write_image("prop2",trace,PGM_RAW);
 
  mask_image(trace,trace,min_length,0); 
}
  
void detect_vert_line_segments(FmiImage *target,FmiImage *trace,unsigned char min_length,unsigned char min_elevation){
  /*int i,j,k,length; */
  /*  const int CRITICAL_LENGTH=4; */
  /*int g1,g2,gd,gmax; */
  /* FmiImage trace; */
  /* canonize_image(target,&trace); */
  /*  info(target); */
  /*info(trace); */
 
 
  detect_horz_maxima(target,trace); /* fmi_image_filter.h */
  if (FMI_DEBUG(1)) write_image("maxima",trace,PGM_RAW);
 
  /* fmi_image_filter.h */
  mask_image(trace,trace,min_elevation,0); 
  if (FMI_DEBUG(1)) write_image("maxima2",trace,PGM_RAW);
 
  /* go right, measure segment length... */
  propagate_up(NULL,trace,trace,1,put_pixel);   
  if (FMI_DEBUG(1)) write_image("prop",trace,PGM_RAW);
 
  /* ...and spread it back left */
  propagate_down(trace,trace,trace,0,put_pixel);  
  if (FMI_DEBUG(1)) write_image("prop2",trace,PGM_RAW);
 
  mask_image(trace,trace,min_length,0); 
  /*release_image(trace); */
}