How can i convert a color cartoon into line art?

Discussion in 'Photoshop Tutorials' started by James, Feb 19, 2004.

  1. James

    James Guest

    How can i convert a color cartoon into line art?
     
    James, Feb 19, 2004
    #1
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  2. James

    Bill Hilton Guest

    From: "James"
    Maybe this isn't what you want, but open the Channels palette, duplicate one of
    the channels (drag it to the bent page icon) and on this dupe run Filter >
    Stylize > Find Edges ...

    Bill
     
    Bill Hilton, Feb 19, 2004
    #2
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  3. James

    Steve Moody Guest

    It *IS* line art.
     
    Steve Moody, Feb 19, 2004
    #3
  4. James

    jjs Guest

    :) It really is! I wonder if he didn't mean vector art, or raster outlines.
     
    jjs, Feb 19, 2004
    #4
  5. James

    James Guest

    yeah probably vector because i want to put it into my cad program
     
    James, Feb 19, 2004
    #5
  6. James

    RickT Guest

    Good luck.

    I'm going through the same process with a few very simple raster
    logos I'd like to convert to vector. Bottom line is, there's no easy
    way in PS get accurate results without a LOT of work, either by
    manually retracing with Bevier lines, curves, or using Quick Mask,
    the Extract tool (what a joke), or Filters/Stylize/Find Edges.

    All of these methods entail a lot of cleanup and none worked well
    for my particular logos, so I went in search of third-party utilities..
    Most were even worse than PS. I tried CorelTRACE, AutoTrace,
    PTVector, R2VTool, WinTopo and a half dozen others, with
    limited amounts of success. AutoTrace produced the best results
    but lots of cleanup was still required. If you have Flash, there's
    supposedly a great and easy way to convert raster images to
    vector, but unfortunately I don't have Flash on my system.

    For the life of me I don't understand why finding simple edges in
    line art and making vectors out of them is such a problem for
    these programs. Or even expanding/improving the options in
    PS's Find Edges would help tremendously. At least accurate
    paths could be exported to Adobe Illustrator or another vector
    graphics editor.

    Rick
     
    RickT, Feb 19, 2004
    #6
  7. James

    jjs Guest

    As you noted, it takes a lot of manual work, touch-up and correction - all
    human decisions, and we don't even know how we know this stuff.

    Have you tried Adobe Streamline? It must be 'trained' or configured to get
    very close to what you need, but with some work (reading docs) you might
    have better luck. You can download a version from Adobe. 'Save' is crippled,
    but it might give you an idea.
     
    jjs, Feb 19, 2004
    #7
  8. James

    Warren Sarle Guest

    Oddly enough, Smart Blur has better options for finding edges
    than Find Edges does.

    Another possiblity is to use High Pass followed by an Omega-shaped
    curve that changes middle gray to white and light or dark gray to
    black.

    Running Median several times with a small radius may help to clean
    things up.
     
    Warren Sarle, Feb 19, 2004
    #8
  9. James

    RickT Guest

    Thanks, but I eventually got what I needed via AutoTrace
    and potrace (which also required a lot of fiddling, but at least
    they're free): http://potrace.sourceforge.net/

    Rick
     
    RickT, Feb 19, 2004
    #9
  10. James

    jjs Guest

    True! That option needs a new name. Suggestions?
     
    jjs, Feb 20, 2004
    #10
  11. James

    Steve Moody Guest

    We can rename it all we want, but until Adobe changes the name, it
    will still be smart blur.
     
    Steve Moody, Feb 20, 2004
    #11
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