https://github.com/mattvenn/spiraliser
converts images to svg spirals
https://github.com/mattvenn/spiraliser
Last synced: 2 months ago
JSON representation
converts images to svg spirals
- Host: GitHub
- URL: https://github.com/mattvenn/spiraliser
- Owner: mattvenn
- Created: 2018-01-19T18:05:01.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2018-01-23T19:58:04.000Z (over 7 years ago)
- Last Synced: 2025-03-14T21:04:36.362Z (2 months ago)
- Language: Python
- Size: 179 KB
- Stars: 6
- Watchers: 2
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Spiraliser
converts a jpg image into an SVG spiral.
# Requirements
* Python3
* PyQT5
# Thanks
* [Krummrey for their code](https://github.com/krummrey/SpiralFromImage) that I converted from Java to Python.
# Other useful bits
* hp2xx is an hpgl viewer - sudo apt-get install hp2xx
* pstoedit for converting eps to hpgl: [my modified version for big files](https://github.com/mattvenn/pstoedit-3.70)
* [hp gl viewer](http://service-hpglview.web.cern.ch/service-hpglview/download_index.html) from cern (requires installation of libjpeg62 and [libxp](https://packages.ubuntu.com/trusty/amd64/libxp6/download)
* [stabilo 88 pen holder for roland plotters](https://www.thingiverse.com/thing:244675)
# Conversions
pstoedit can convert to hpgl format. But it can't read SVGs, so an intermediate
format is needed.
## svg to eps
inkscape save.svg --export-eps save.eps
works on some files but on others, the exported eps is a rastered image of the
vectors, so pstoedit can't use it.
One thing that definitly will fail to export to vector eps is a square converted
to path. A path drawn with the line tool works.
If the SVG is 100mm square, then after converting to hpgl, will also be 100mm
square. Not sure about if it will measure 100mm on the plotter yet.
## eps to hpgl
pstoedit -f hpgl save.eps save.hpgl
Other useful commands for pstoedit
* -xshift and -yshift, move the hpgl around. Units seem to be 2.84 per mm. So to
shift 10mm horizontally, use -xshift 28.4
* -xscale and -yscale, scales the hpgl. -xscale 2 -yscale 2 to double the image.