Empathy List Archives

JB

Jon Bondy

Thu, Aug 27, 2026 11:31 AM

There are tutorials about how to take a photo and convert it into a line
drawing using ImageMagik and there are also some online tools to do
similar. They take one bitmap and turn it into another bitmap. Does
anyone know of a way to take a bitmap (photo) and turn it into a series
of line segments in SVG (or similar) format outlining the boundaries of
similar gray scale or color?

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There are tutorials about how to take a photo and convert it into a line drawing using ImageMagik and there are also some online tools to do similar. They take one bitmap and turn it into another bitmap. Does anyone know of a way to take a bitmap (photo) and turn it into a series of line segments in SVG (or similar) format outlining the boundaries of similar gray scale or color? -- This email has been checked for viruses by AVG antivirus software. www.avg.com

JB

Jordan Brown

Thu, Aug 27, 2026 4:07 PM

There are tutorials about how to take a photo and convert it into a line drawing using ImageMagik and there are also some online tools to do similar. They take one bitmap and turn it into another bitmap. Does anyone know of a way to take a bitmap (photo) and turn it into a series of line segments in SVG (or similar) format outlining the boundaries of similar gray scale or color?

Some drawing tools have a “trace” feature that can do this. I’m pretty sure that CorelDraw does. (But alas $$$.). Don’t know about Inkscape.

But I have found that I was not very satisfied with the results. They tend to produce wiggly lines that more or less match the image, but don’t match the intent of having a smooth curve. I usually use Inkscape to manually trace the image using Bézier curves. I then either import the resulting SVG into OpenSCAD, or transcribe the coordinates to into the OpenSCAD program, into calls to Bézier functions.

> There are tutorials about how to take a photo and convert it into a line drawing using ImageMagik and there are also some online tools to do similar. They take one bitmap and turn it into another bitmap. Does anyone know of a way to take a bitmap (photo) and turn it into a series of line segments in SVG (or similar) format outlining the boundaries of similar gray scale or color? Some drawing tools have a “trace” feature that can do this. I’m pretty sure that CorelDraw does. (But alas $$$.). Don’t know about Inkscape. But I have found that I was not very satisfied with the results. They tend to produce wiggly lines that more or less match the image, but don’t match the **intent** of having a smooth curve. I usually use Inkscape to manually trace the image using Bézier curves. I then either import the resulting SVG into OpenSCAD, or transcribe the coordinates to into the OpenSCAD program, into calls to Bézier functions.

JJ

jon jonbondy.com

Thu, Aug 27, 2026 4:41 PM

Jordan:

Thanks. InkScape has a Path, Trace Bitmap feature that works, but not
as well as the ImageMagik approach. The InkScape approach may result in
SVGs, while the IM approach just creates a new image.

I just tried combining IM as a pre-processor for IS, and that works very
well, creating a reasonable SVG file!

FYI, the IM command line is as follows, where "Seven.jpg" is the
original image.

magick Seven.jpg -canny 0x1+05%+15% Seven_lines.png

Jon

On 8/27/2026 12:07 PM, Jordan Brown wrote:

There are tutorials about how to take a photo and convert it into a line drawing using ImageMagik and there are also some online tools to do similar. They take one bitmap and turn it into another bitmap. Does anyone know of a way to take a bitmap (photo) and turn it into a series of line segments in SVG (or similar) format outlining the boundaries of similar gray scale or color?

Some drawing tools have a “trace” feature that can do this. I’m pretty sure that CorelDraw does. (But alas $$$.). Don’t know about Inkscape.

But I have found that I was not very satisfied with the results. They tend to produce wiggly lines that more or less match the image, but don’t match the intent of having a smooth curve. I usually use Inkscape to manually trace the image using Bézier curves. I then either import the resulting SVG into OpenSCAD, or transcribe the coordinates to into the OpenSCAD program, into calls to Bézier functions.

Jordan: Thanks. InkScape has a Path, Trace Bitmap feature that works, but not as well as the ImageMagik approach. The InkScape approach may result in SVGs, while the IM approach just creates a new image. I just tried combining IM as a pre-processor for IS, and that works very well, creating a reasonable SVG file! FYI, the IM command line is as follows, where "Seven.jpg" is the original image. magick Seven.jpg -canny 0x1+05%+15% Seven_lines.png Jon On 8/27/2026 12:07 PM, Jordan Brown wrote: > >> There are tutorials about how to take a photo and convert it into a line drawing using ImageMagik and there are also some online tools to do similar. They take one bitmap and turn it into another bitmap. Does anyone know of a way to take a bitmap (photo) and turn it into a series of line segments in SVG (or similar) format outlining the boundaries of similar gray scale or color? > Some drawing tools have a “trace” feature that can do this. I’m pretty sure that CorelDraw does. (But alas $$$.). Don’t know about Inkscape. > > But I have found that I was not very satisfied with the results. They tend to produce wiggly lines that more or less match the image, but don’t match the **intent** of having a smooth curve. I usually use Inkscape to manually trace the image using Bézier curves. I then either import the resulting SVG into OpenSCAD, or transcribe the coordinates to into the OpenSCAD program, into calls to Bézier functions.

GB

Glenn Butcher

Thu, Aug 27, 2026 4:49 PM

I did this to make stone walls, drew a black-n-white image of the wall
profile and wrote software to use OpenCV to extract the contours of the
stones to make meshes and then decorate them with noise-derived
textures. Not exactly plug-n-play, but OpenCV allows you to simplify the
discovered contours with another routine, adjustable regarding degree of
simplification. Oh, and no .svg output without writing a routine to do
that.

Extracting shapes from photographs is challenging, algorithms aren't
smart enough to handle all the color/contrast situations that clutter
photos. I've tried using the AI image manipulation tools with limited
success; I did manage to coax Nano Banana to render a black-n-white of a
stone wall in a vintage photo, took a few choice words to get it off
converting to bricks and such. It did things I didn't ask for, like
replace people's faces with faces from other photos (one kid had a
beard, thank you...), so didn't know if I could trust its mortar lines,
but with enough constraining words I think such an approach can work.

Glenn

On 8/27/2026 5:31 AM, Jon Bondy via Discuss wrote:

There are tutorials about how to take a photo and convert it into a
line drawing using ImageMagik and there are also some online tools to
do similar. They take one bitmap and turn it into another bitmap.
Does anyone know of a way to take a bitmap (photo) and turn it into a
series of line segments in SVG (or similar) format outlining the
boundaries of similar gray scale or color?

I did this to make stone walls, drew a black-n-white image of the wall profile and wrote software to use OpenCV to extract the contours of the stones to make meshes and then decorate them with noise-derived textures. Not exactly plug-n-play, but OpenCV allows you to simplify the discovered contours with another routine, adjustable regarding degree of simplification. Oh, and no .svg output without writing a routine to do that. Extracting shapes from photographs is challenging, algorithms aren't smart enough to handle all the color/contrast situations that clutter photos. I've tried using the AI image manipulation tools with limited success; I did manage to coax Nano Banana to render a black-n-white of a stone wall in a vintage photo, took a few choice words to get it off converting to bricks and such. It did things I didn't ask for, like replace people's faces with faces from other photos (one kid had a beard, thank you...), so didn't know if I could trust its mortar lines, but with enough constraining words I think such an approach can work. Glenn On 8/27/2026 5:31 AM, Jon Bondy via Discuss wrote: > There are tutorials about how to take a photo and convert it into a > line drawing using ImageMagik and there are also some online tools to > do similar. They take one bitmap and turn it into another bitmap. > Does anyone know of a way to take a bitmap (photo) and turn it into a > series of line segments in SVG (or similar) format outlining the > boundaries of similar gray scale or color? > >

L

larry

Thu, Aug 27, 2026 5:24 PM

On Thu, 2026-08-27 at 07:31 -0400, Jon Bondy via Discuss wrote:

There are tutorials about how to take a photo and convert it into a
line
drawing using ImageMagik and there are also some online tools to do
similar. They take one bitmap and turn it into another bitmap. Does
anyone know of a way to take a bitmap (photo) and turn it into a
series
of line segments in SVG (or similar) format outlining the boundaries
of
similar gray scale or color?

makerlab.com has some image to keychain or bust or statue or ??
I don't use it myself, but a lot of folks have reasonable results from
it.

Larry

On Thu, 2026-08-27 at 07:31 -0400, Jon Bondy via Discuss wrote: > There are tutorials about how to take a photo and convert it into a > line > drawing using ImageMagik and there are also some online tools to do > similar. They take one bitmap and turn it into another bitmap. Does > anyone know of a way to take a bitmap (photo) and turn it into a > series > of line segments in SVG (or similar) format outlining the boundaries > of > similar gray scale or color? makerlab.com has some image to keychain or bust or statue or ?? I don't use it myself, but a lot of folks have reasonable results from it. Larry

WF

William F. Adams

Thu, Aug 27, 2026 6:34 PM

I've always found it best to just re-draw:
https://community.carbide3d.com/t/drawing-a-weber-gasket/104998
William
-- Sphinx of black quartz, judge my vow.https://designinto3d.com/

On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general discussion Mailing-list discuss@lists.openscad.org wrote:

There are tutorials about how to take a photo and convert it into a line
drawing using ImageMagik and there are also some online tools to do
similar. They take one bitmap and turn it into another bitmap. Does
anyone know of a way to take a bitmap (photo) and turn it into a series
of line segments in SVG (or similar) format outlining the boundaries of
similar gray scale or color?

--
This email has been checked for viruses by AVG antivirus software.
www.avg.com

OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

I've always found it best to just re-draw: https://community.carbide3d.com/t/drawing-a-weber-gasket/104998 William -- Sphinx of black quartz, judge my vow.https://designinto3d.com/ On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general discussion Mailing-list <discuss@lists.openscad.org> wrote: There are tutorials about how to take a photo and convert it into a line drawing using ImageMagik and there are also some online tools to do similar. They take one bitmap and turn it into another bitmap. Does anyone know of a way to take a bitmap (photo) and turn it into a series of line segments in SVG (or similar) format outlining the boundaries of similar gray scale or color? -- This email has been checked for viruses by AVG antivirus software. www.avg.com _______________________________________________ OpenSCAD mailing list To unsubscribe send an email to discuss-leave@lists.openscad.org

TA

Todd Allen

Thu, Aug 27, 2026 6:41 PM

GIMP is a free photoshop type app with many tools one can use to "simplify"
a photo.

On Thu, Aug 27, 2026, 1:34 PM William F. Adams via Discuss <
discuss@lists.openscad.org> wrote:

I've always found it best to just re-draw:

https://community.carbide3d.com/t/drawing-a-weber-gasket/104998

William

--
Sphinx of black quartz, judge my vow.
https://designinto3d.com/

On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general
discussion Mailing-list discuss@lists.openscad.org wrote:

There are tutorials about how to take a photo and convert it into a line
drawing using ImageMagik and there are also some online tools to do
similar. They take one bitmap and turn it into another bitmap. Does
anyone know of a way to take a bitmap (photo) and turn it into a series
of line segments in SVG (or similar) format outlining the boundaries of
similar gray scale or color?

--
This email has been checked for viruses by AVG antivirus software.
www.avg.com

OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

GIMP is a free photoshop type app with many tools one can use to "simplify" a photo. On Thu, Aug 27, 2026, 1:34 PM William F. Adams via Discuss < discuss@lists.openscad.org> wrote: > I've always found it best to just re-draw: > > https://community.carbide3d.com/t/drawing-a-weber-gasket/104998 > > William > > -- > Sphinx of black quartz, judge my vow. > https://designinto3d.com/ > > > On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general > discussion Mailing-list <discuss@lists.openscad.org> wrote: > > > There are tutorials about how to take a photo and convert it into a line > drawing using ImageMagik and there are also some online tools to do > similar. They take one bitmap and turn it into another bitmap. Does > anyone know of a way to take a bitmap (photo) and turn it into a series > of line segments in SVG (or similar) format outlining the boundaries of > similar gray scale or color? > > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

KE

Karl Exler

Thu, Aug 27, 2026 6:55 PM

I think there is a function in Inkjet, which does something...
Unfortunately I don´t know how this function is called by now.

Karl

Am 27.08.26 um 20:41 schrieb Todd Allen via Discuss:

GIMP is a free photoshop type app with many tools one can use to
"simplify" a photo.

On Thu, Aug 27, 2026, 1:34 PM William F. Adams via Discuss
discuss@lists.openscad.org wrote:

 I've always found it best to just re-draw:

 https://community.carbide3d.com/t/drawing-a-weber-gasket/104998

 William

 -- 
 Sphinx of black quartz, judge my vow.
 https://designinto3d.com/


 On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general
 discussion Mailing-list <discuss@lists.openscad.org> wrote:


     There are tutorials about how to take a photo and convert it
     into a line
     drawing using ImageMagik and there are also some online tools
     to do
     similar.  They take one bitmap and turn it into another
     bitmap.  Does
     anyone know of a way to take a bitmap (photo) and turn it into
     a series
     of line segments in SVG (or similar) format outlining the
     boundaries of
     similar gray scale or color?


     -- 
     This email has been checked for viruses by AVG antivirus software.
     www.avg.com <http://www.avg.com>
     _______________________________________________
     OpenSCAD mailing list
     To unsubscribe send an email to discuss-leave@lists.openscad.org

 _______________________________________________
 OpenSCAD mailing list
 To unsubscribe send an email to discuss-leave@lists.openscad.org

OpenSCAD mailing list
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I think there is a function in Inkjet, which does something... Unfortunately I don´t know how this function is called by now. Karl Am 27.08.26 um 20:41 schrieb Todd Allen via Discuss: > GIMP is a free photoshop type app with many tools one can use to > "simplify" a photo. > > On Thu, Aug 27, 2026, 1:34 PM William F. Adams via Discuss > <discuss@lists.openscad.org> wrote: > > I've always found it best to just re-draw: > > https://community.carbide3d.com/t/drawing-a-weber-gasket/104998 > > William > > -- > Sphinx of black quartz, judge my vow. > https://designinto3d.com/ > > > On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general > discussion Mailing-list <discuss@lists.openscad.org> wrote: > > > There are tutorials about how to take a photo and convert it > into a line > drawing using ImageMagik and there are also some online tools > to do > similar. They take one bitmap and turn it into another > bitmap. Does > anyone know of a way to take a bitmap (photo) and turn it into > a series > of line segments in SVG (or similar) format outlining the > boundaries of > similar gray scale or color? > > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com <http://www.avg.com> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org

JJ

jon jonbondy.com

Thu, Aug 27, 2026 10:44 PM

William:

Thanks. I may need to do a dozen or two of these things, and they may be quite complex.

Jon

On 8/27/2026 2:34 PM, William F. Adams wrote:
I've always found it best to just re-draw:

https://community.carbide3d.com/t/drawing-a-weber-gasket/104998 https://urldefense.proofpoint.com/v2/url?u=https-3A__community.carbide3d.com_t_drawing-2Da-2Dweber-2Dgasket_104998&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=Ah1_CbLGFTmg80XCyoPCqjM3t1KBsCgykRYAzkUz-jFJSweROsMDtK6d7qYCxORf&s=V_Z6UVLr0zeqAHyMpDGjr7r4CzMlDL8mGu09PlJoay4&e=

William

--
Sphinx of black quartz, judge my vow.
https://designinto3d.com/https://urldefense.proofpoint.com/v2/url?u=https-3A__designinto3d.com_&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=Ah1_CbLGFTmg80XCyoPCqjM3t1KBsCgykRYAzkUz-jFJSweROsMDtK6d7qYCxORf&s=fU1V7GzA-rHruzCCK7IPReQrS6H0UnAu-8O5evm1LVI&e=

On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general discussion Mailing-list discuss@lists.openscad.org mailto:discuss@lists.openscad.org wrote:

There are tutorials about how to take a photo and convert it into a line
drawing using ImageMagik and there are also some online tools to do
similar. They take one bitmap and turn it into another bitmap. Does
anyone know of a way to take a bitmap (photo) and turn it into a series
of line segments in SVG (or similar) format outlining the boundaries of
similar gray scale or color?

--
This email has been checked for viruses by AVG antivirus software.
www.avg.com http://www.avg.com

OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org mailto:discuss-leave@lists.openscad.org

William: Thanks. I may need to do a dozen or two of these things, and they may be quite complex. Jon On 8/27/2026 2:34 PM, William F. Adams wrote: I've always found it best to just re-draw: https://community.carbide3d.com/t/drawing-a-weber-gasket/104998<https://urldefense.proofpoint.com/v2/url?u=https-3A__community.carbide3d.com_t_drawing-2Da-2Dweber-2Dgasket_104998&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=Ah1_CbLGFTmg80XCyoPCqjM3t1KBsCgykRYAzkUz-jFJSweROsMDtK6d7qYCxORf&s=V_Z6UVLr0zeqAHyMpDGjr7r4CzMlDL8mGu09PlJoay4&e=> William -- Sphinx of black quartz, judge my vow. https://designinto3d.com/<https://urldefense.proofpoint.com/v2/url?u=https-3A__designinto3d.com_&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=Ah1_CbLGFTmg80XCyoPCqjM3t1KBsCgykRYAzkUz-jFJSweROsMDtK6d7qYCxORf&s=fU1V7GzA-rHruzCCK7IPReQrS6H0UnAu-8O5evm1LVI&e=> On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general discussion Mailing-list <discuss@lists.openscad.org><mailto:discuss@lists.openscad.org> wrote: There are tutorials about how to take a photo and convert it into a line drawing using ImageMagik and there are also some online tools to do similar. They take one bitmap and turn it into another bitmap. Does anyone know of a way to take a bitmap (photo) and turn it into a series of line segments in SVG (or similar) format outlining the boundaries of similar gray scale or color? -- This email has been checked for viruses by AVG antivirus software. www.avg.com<http://www.avg.com> _______________________________________________ OpenSCAD mailing list To unsubscribe send an email to discuss-leave@lists.openscad.org<mailto:discuss-leave@lists.openscad.org>

JB

Jon Bondy

Thu, Aug 27, 2026 10:47 PM

Todd:

Thanks. ImageMagik does most of this with a command line interface
which allows for batch processing; it also is free.

Jon

On 8/27/2026 2:41 PM, Todd Allen via Discuss wrote:

GIMP is a free photoshop type app with many tools one can use to
"simplify" a photo.

On Thu, Aug 27, 2026, 1:34 PM William F. Adams via Discuss
discuss@lists.openscad.org wrote:

 I've always found it best to just re-draw:

 https://community.carbide3d.com/t/drawing-a-weber-gasket/104998
 <https://urldefense.proofpoint.com/v2/url?u=https-3A__community.carbide3d.com_t_drawing-2Da-2Dweber-2Dgasket_104998&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=v74Zgd6D2TjRt5ES8CHWOa2YICrVP4XpuEKJGcslvkU0TswF8cNQkvZ9CuYK7yhf&s=sewdCNqqFYHvBYHrVOMYJpSYrWP-I4uP1kHr4NoloNk&e=>

 William

 -- 
 Sphinx of black quartz, judge my vow.
 https://designinto3d.com/
 <https://urldefense.proofpoint.com/v2/url?u=https-3A__designinto3d.com_&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=v74Zgd6D2TjRt5ES8CHWOa2YICrVP4XpuEKJGcslvkU0TswF8cNQkvZ9CuYK7yhf&s=2vI6lgdp76VcnWVcWbCTz2sHgrI26Gv1ajwUZ-1YIcQ&e=>


 On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general
 discussion Mailing-list <discuss@lists.openscad.org> wrote:


     There are tutorials about how to take a photo and convert it
     into a line
     drawing using ImageMagik and there are also some online tools
     to do
     similar.  They take one bitmap and turn it into another
     bitmap.  Does
     anyone know of a way to take a bitmap (photo) and turn it into
     a series
     of line segments in SVG (or similar) format outlining the
     boundaries of
     similar gray scale or color?


     -- 
     This email has been checked for viruses by AVG antivirus software.
     www.avg.com
     <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=v74Zgd6D2TjRt5ES8CHWOa2YICrVP4XpuEKJGcslvkU0TswF8cNQkvZ9CuYK7yhf&s=YAoQkdvzLXlTaQfuwd6dpSKrEQQqZF4ep-FAIDdAmUk&e=>
     _______________________________________________
     OpenSCAD mailing list
     To unsubscribe send an email to discuss-leave@lists.openscad.org

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Todd: Thanks. ImageMagik does most of this with a command line interface which allows for batch processing; it also is free. Jon On 8/27/2026 2:41 PM, Todd Allen via Discuss wrote: > GIMP is a free photoshop type app with many tools one can use to > "simplify" a photo. > > On Thu, Aug 27, 2026, 1:34 PM William F. Adams via Discuss > <discuss@lists.openscad.org> wrote: > > I've always found it best to just re-draw: > > https://community.carbide3d.com/t/drawing-a-weber-gasket/104998 > <https://urldefense.proofpoint.com/v2/url?u=https-3A__community.carbide3d.com_t_drawing-2Da-2Dweber-2Dgasket_104998&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=v74Zgd6D2TjRt5ES8CHWOa2YICrVP4XpuEKJGcslvkU0TswF8cNQkvZ9CuYK7yhf&s=sewdCNqqFYHvBYHrVOMYJpSYrWP-I4uP1kHr4NoloNk&e=> > > William > > -- > Sphinx of black quartz, judge my vow. > https://designinto3d.com/ > <https://urldefense.proofpoint.com/v2/url?u=https-3A__designinto3d.com_&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=v74Zgd6D2TjRt5ES8CHWOa2YICrVP4XpuEKJGcslvkU0TswF8cNQkvZ9CuYK7yhf&s=2vI6lgdp76VcnWVcWbCTz2sHgrI26Gv1ajwUZ-1YIcQ&e=> > > > On Thursday, August 27, 2026 at 07:31:22 AM EDT, OpenSCAD general > discussion Mailing-list <discuss@lists.openscad.org> wrote: > > > There are tutorials about how to take a photo and convert it > into a line > drawing using ImageMagik and there are also some online tools > to do > similar. They take one bitmap and turn it into another > bitmap. Does > anyone know of a way to take a bitmap (photo) and turn it into > a series > of line segments in SVG (or similar) format outlining the > boundaries of > similar gray scale or color? > > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com > <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=AsrE-c7ZR7B2Kyr3qgfvvppkCEBVsNmwEMndcrRSuOI&m=v74Zgd6D2TjRt5ES8CHWOa2YICrVP4XpuEKJGcslvkU0TswF8cNQkvZ9CuYK7yhf&s=YAoQkdvzLXlTaQfuwd6dpSKrEQQqZF4ep-FAIDdAmUk&e=> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org

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perhaps a bit off topic: automatic generation of line drawing from photo