Full Color Stencil Art with Halftoning

Step 3 Trace

We'll do the halftoning and vectorization in Illustrator.

• Open up the cyan jpg in Illustrator.
• Select the image
• Edit > Edit Colors > Convert to Grayscale
• Filter > Pixelate > Halftone. I chose a 30 px halftone size.
• In the Control Panel, click the drop down arrow next to "Live Trace" and select "Tracing Options"
• I used: Black and White, Threshold 128, 0 px Blur, Fills, 2 px Path Fitting, 100 px Minimum Area (so the tiniest halftone holes are ignored), Corner Angle 20, Ignore White. Save these options, since you'll need them three more times.
• In the Control Panel select the "Expand" button, which will make paths from the Live Trace.
• If you want to, clean up extraneous dots with the Direct Selection Tool (white arrow). If you select some dots to remove, and then hit delete, it only deletes the points you selected. If you hit delete again, it removes the entireobjects you are on the boundary of selecting.
• File > Export. Select "AutoCad Drawing (.DWG)" For this window, my options were: Version 2000/LT2000, 1 inch = 1 unit, 8 colors, PNG raster file format, Preserve Appearance

If you're stuck, here's a similar walkthrough describing halftoning in Illustrator.