On 10/24/07, Jarlath Reidy <[EMAIL PROTECTED]> wrote: > I have a friend who uses images sent to him by clients to make > engravings on various materials. This is a start up business and he is > having some teething problems. > > He has an issue where the boundary between the foreground and the > background isn't clear cut and the engraving looks smudged around the > edges. > > I've attached a piece of the image which the client sent in jpg format. > Unfortunately, the typical client is not very computer savvy and asking > for .tiffs isn't possible.
Not sure if I understand the question, but I removed the artifacts in the image in this manner: 1. Convert image to grayscale 2. Adjust Levels - moving the rightmost slider inwards will "clip" the light-colored artifacts in the background. Moving the middle slider to the right will "squash" the dark-colored artifacts in the foreground. 3. Save as PNG (as JPEG will only re-introduce atrifacts Optionally 4. Open inkscape and import the new PNG 5. Trace the bitmap and save as SVG (steps 4-5 can be accomplished in GIMP by selecting the foreground areas, creating a path from the selection and importing it). Now he should have a definite foreground/backgound in the PNG and possibly a SVG that can be scaled up or down without distortion or added artifacts. I would guess that in whatever process he's using for engraving, vector artwork would be preferable (at least that's what 99% of our vendors want). This method won't always work - esp. if the JPEG compression is very high, or the image resolution very low. Sometimes you have to bite the bullet and pull out the pen tool :) Let me know if this helps, or if I missed the point completely... Chris
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