[OS X TeX] i-installer and autotrace
bvoisin at mac.com
Mon Jul 4 16:23:32 CEST 2005
Le 4 juil. 05 à 16:03, Stephen Moye a écrit :
>> On Jul 4, 2005, at 15:31, Bruno Voisin wrote:
>>> That said, I prefer personally potrace to autotrace.
> I too prefer potrace, but autotrace works on a wider variety of
> file types such as tiff.
Earlier this year I traced a JPEG logo to convert it to EPS. After
much failed attempts, I used the following route:
- Use either GraphicConverter (came free on my Mac), or convert from
ImageMagick, to convert the JPEG to black-and-white BMP. I'm not sure
which of the two I used eventually. Possibly GraphicConverter, as it
provides a GUI for setting the value of the threshold used when
converting to B&W -- and seeing live the influence of this value. The
choice of the threshold has a crucial effect on the quality of the
final EPS file.
- Applied both potrace and autotrace to the BMP file independently.
Found out the output of potrace is cleaner (less tracing artifacts).
I also tried letting potrace and/or autotrace use their own
algorithms for converting the original color file to black-and-white
before tracing it: the output was much worse than with the manual
That said, it was all before hearing Illustrator CS2 includes a
tracing algorithm. Now I probably wouldn't go that route.
Bruno Voisin--------------------- Info ---------------------
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