Skip navigation
Currently Being Moderated

Live Tracing Help With Straight Lines

Jul 24, 2012 1:07 PM

Hi,

 

I'm a web dev. I guess I'm a bit (a lot) behind the times still using CS4 and CS5. I primarily work in Photoshop and I'm trying to get better with Illustrator. One -very- common task I would -love- to be able to do efficiently in AI is something like this:

 

I get a bitmap image, which to the naked eye is pretty much just straight lines. I want to import it into AI and then start tweaking. If I hand draw something with a sharpie and then scan it, it works fine. But very few bitmaps, regardless of how simple, Live Trace in a good way.

 

I've bought a couple of pricey AI books and they -always- use some really complicated drawing to show how wonderful Live Trace is. And that's the irony: the more complex the bitmap, the -better- it seems to do. It's SIMPLE stuff---like -I- use everyday for web icons and buttons that it does so poorly.

 

Any bitmap that has some sort of 'shaded' edge... OR is not a straight 90 or 0? fawgeddaboudit.

 

Always lots of swirls and curves. And then I get frustrated trying to 'simplify'  paths.

 

SO: Are there any 'ninja' secrets to doing this? I've read a couple of posts which basically say 'man up' and learn to hand draw better, but it just seems like AI is so sophisticated that it -should- do this properly and this =must= be user error.

 

 

I'm not above girlie-man begging.

 

TIA,

 

---JC

 
Replies
  • Currently Being Moderated
    Jul 24, 2012 1:43 PM   in reply to Suntower

    If it is really simple, the just use the Pen tool and forget about Live/Image Trace.

     
    |
    Mark as:
  • Currently Being Moderated
    Jul 24, 2012 2:40 PM   in reply to Suntower

    JC,

     

    A few images might suggest to the suggesters what they might suggest.

     

    Soon midnight here.

     
    |
    Mark as:
  • Currently Being Moderated
    Jul 24, 2012 3:36 PM   in reply to Suntower

    This is no sufficient basis for an autotrace. If there are only 5 pixels in a row, how on earth should the autotrace module know that these pixels form a straight line? They could instead mean anything. If this image were only a little smaller, even a human would have to guess what's on it.

     
    |
    Mark as:
  • Currently Being Moderated
    Jul 24, 2012 4:30 PM   in reply to Suntower

    Suntower wrote:

     

    How does my eyeball do it?

    Experience. You know the object and therefore you recognize it. Apart from that: http://en.wikipedia.org/wiki/Gestalt_psychology

    It has taken mankind quite a long time to have that. Longer than Illustrators development cycles ...

     
    |
    Mark as:
  • Currently Being Moderated
    Jul 24, 2012 4:54 PM   in reply to Suntower

    As Monica said, it is a hard case because the stripes on the barricade are not very long.

     

    But there are some things you can do to help.

    First, for low resolution images the "noise" parameter will be the one you want to play with

    the most. It will affect the results more than anything else, and you will probably need to

    set it lower than the default value. For example I set it to 3 to get the results  below.

     

    Second, check the "snap to lines" box. It will do what it says.

     

    Third, move the "corners" slider to the right, I put it at 100%.

    Here is what I got. Not perfect, but did get some things right:

     

    barricade traced.jpg

     
    |
    Mark as:
  • Currently Being Moderated
    Jul 24, 2012 10:30 PM   in reply to Suntower

    I would say tha you might have difficulty accomplishing what you want to dosp get out the pen tool.

     
    |
    Mark as:
  • Currently Being Moderated
    Jul 25, 2012 5:17 AM   in reply to Suntower

    Are there any 'ninja' secrets to doing this?

    Ninjas don't use autotracing.

     

    JET

     
    |
    Mark as:
  • Currently Being Moderated
    Jul 25, 2012 10:57 AM   in reply to Suntower

    Yes the results I posted are using CS6. sorry about that..  even though you said right out that you were using CS4 & 5

    my eyes somehow skipped over that.

     
    |
    Mark as:

More Like This

  • Retrieving data ...

Bookmarked By (0)

Answers + Points = Status

  • 10 points awarded for Correct Answers
  • 5 points awarded for Helpful Answers
  • 10,000+ points
  • 1,001-10,000 points
  • 501-1,000 points
  • 5-500 points