#include "VisXV4.h"    /* VisionX structure include file       */
#include "Vutil.h"     /* VisionX utility header files         */

int main(int argc, char** argv)
{
Vfstruct (im);
Vfstruct (om);
int x, y;
    Vfread( &im, "infile.vx");
    Vfnewim (&om, im.type, im.bbx, im.chan);
    for ( y = im.ylo; y <= im.yhi; y++) {
       for ( x = im.xlo; x <= im.xhi; x++) {
          if ( im.u[y][x] >= 50 ) {
              om.u[y][x] = 255;
          } else {
              om.u[y][x] = 0;
          }
       }
    }
    Vfwrite( &om, "outfile.vx");
exit(0);
}