Then I used the following script to convert.

Gtk2 also has SVG capabilities, see Gnome2::Rsvg

#!/usr/bin/perl
use warnings;
use strict;
use Image::Magick;

my $infile = $ARGV[0];

(my $filebase) = $infile  =~ /(.*)\.(\w+)$/;

my $p = new Image::Magick;
$p->Read($infile);
my $outbmp =  $filebase.'.'.'bmp';
$p->Write($outbmp) or warn "@!";

my $fin = $outbmp;
my $fout = $filebase.'.svg';

my @options = qw( --despeckle-level 8   
          --corner-always-threshold 60 
          --corner-surround 60 
          --tangent-surround 3 
          --color-count 256 
          --corner-threshold 100 
          --despeckle-tightness 2 
          --error-threshold 2 
          --filter-iterations 4 
          --line-reversion-threshold .01 
          --line-threshold 1 
          );

system ("./autotrace --output-format svg  --output-file $fout @options
+  $fin"); 

__END__
adjColor = gtk.Adjustment(256, lower=0, upper=256, step_incr=1, page_i
+ncr=0, page_size=0)
adjColAlwThresh = gtk.Adjustment(60, lower=2, upper=180, step_incr=1, 
+page_incr=10, page_size=0)
adjCornSur = gtk.Adjustment(60, lower=2, upper=180, step_incr=1, page_
+incr=20, page_size=0)
adjCornTh = gtk.Adjustment(100, lower=2, upper=180, step_incr=1, page_
+incr=10, page_size=0)
adjDespLev = gtk.Adjustment(8, lower=0, upper=20, step_incr=1, page_in
+cr=0, page_size=0)
adjDespTig = gtk.Adjustment(2, lower=0, upper=8, step_incr=0.1, page_i
+ncr=1, page_size=0)
adjErrThr = gtk.Adjustment(2, lower=.1, upper=10, step_incr=0.1, page_
+incr=1, page_size=0)
adjFiltIt = gtk.Adjustment(4, lower=1, upper=16, step_incr=1, page_inc
+r=0, page_size=0)
adjLineRevThr = gtk.Adjustment(0.01, lower=0.01, upper=0.16, step_incr
+=0.01, page_incr=1, page_size=0)
adjLineThr = gtk.Adjustment(1, lower=1, upper=20, step_incr=1, page_in
+cr=0, page_size=0)
adjTangSur = gtk.Adjustment(3, lower=1, upper=16, step_incr=1, page_in
+cr=0, page_size=0)
adjNumCol = gtk.Adjustment(0, lower=0, upper=256, step_incr=1, page_in
+cr=20, page_size=0)
[download]