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Date: Thu, 7 Nov 2019 15:43:53 -0800
From: "Larry Doolittle (ldoolitt AT recycle DOT lbl DOT gov) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: "Rob Butts \(r DOT butts DOT geda AT gmail DOT com\) \[via geda-user AT delorie DOT com\]" <geda-user AT delorie DOT com>
Subject: Re: [geda-user] PCB jpg to silkscreen
Message-ID: <20191107234353.2cnjvbydorw2nldm@recycle.lbl.gov>
References: <CAM7eQ1m8Jvq_oYnQ+xt5paE-sPs+tCtkNRQe4_5D6FeZ6gSufw AT mail DOT gmail DOT com>
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Rob -

On Thu, Nov 07, 2019 at 05:07:40PM -0500, Rob Butts (r DOT butts DOT geda AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> I searched online for a way to convert a jpg (logo) to a PCB silkscreen.  I
> found only one convoluted way using Inkscape and pstoedit.  I got inkscape
> to work fine but pstoedit is failing.
> Is there another way to convert a jpg to silkscreen?

I've generated Gerber files with QR codes on them,
and then had boards fabbed where the result (on a silkscreen layer)
is easily readable with a phone app.

The python-managed toolchain is:
   qrtools.QR()  makes a .png
   scipy.ndimage.imread() reads the .png
   create a gEDA .pcb file header from a template
   emit one polygon per pixel (or not, the .png is black&white)
   close out the .pcb file
   run pcb -x gerber on that .pcb file
If anyone wants to see this, contact me by PM.

  - Larry