Tutorial on converting raster drawings to vector

I have a friend who does drawings on paper that he wants to get scalable. The high-level path appears to be scan the image and run autotrace in AI.
As I look at online articles, some suggest taking the raster into PS to erase the pencil marks and ink the image. My friend does the inking on the paper before the scan.
I have some experimenting to do with autotrace settings, but I can see right away that some of the lines on the image vary in width in both PS and AI. And, no matter how good his inking is, there is still quite a bit of "noise" along the lines. His inking also leaves quite a bit of variation in line width. What he wants is a constant width.
My question is: if you want a line to be of constant width and you have a scanned image to work with, which tool (PS, AI) and what technique is best to create the result.
One thought is, rather than try to clean up the line in either tool, the better approach might be to draw a new line using the scanned image as a guide. My concern is that the line won't be smooth if done by hand. Are their tools in either PS or AI that would help?
Thanks, and sorry this is a bit vague. I'm just starting to understand the issue.
Tom

You might want to use something like this

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The belt buckle will probably be made from a mold or die. Any artwork can be used for a mold or die as long as the resolution is high enough. If the buckle will be made using a computer controlled router, then you'll need vector artwork to provide paths that direct the router.
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Thanks, didn't see that option before. Tried it, but I still have the problem of the file including all of the workspace and being much larger than the original file. There has to be some trick to detaching the black from the background we're missing.

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Sounds like a poorly defined project then. You need to nail down the client's requirements and expectations.
If the requirements are simply for a scaleable 2D drawing, then a number of rendering methods will work. But if the animation envisioned calls for the cylindrical object to rotate (about any axis other than the line of sight), then doing that kind of frame-by-frame artwork in Illustrator will be inefficiently tedious.
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how do I convert a pdf to vector in illustrator?

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See this thread:
James Talmage, "plugin for creating halftone/array of small objects to approximate an underlying object" #5, 26 Dec 2006 11:05 pm
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I have jpeg image which contains line and circle. i want to convert this image as a vector and i need to export into DXF file format.
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If you do want to use the image trace option here is how you do it:
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>...it basically means i need to
redraw the thing...
Well... one
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With a hope that any Java Guru from SUN Forum can help me to solve my query, I'm posting my thread here.
I have a project with feature to add image. My requirement is to convert any selected image file like (PNG,JPG,BMP,Tiff) into SVG Formate before adding it to Frame.
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How do i convert in freehand lets say jpeg or any ohter
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567murmeli567 wrote:
> How do i convert in freehand lets say jpeg or any ohter
picture format to
> vector graphic so i can scale it freely?
If you have a sharp, high resolution image you may be able to
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draw with FH
drawing tools.
Judy Arndt

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Tutorial on converting raster drawings to vector

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