/usr/bin/potrace

potrace 1.16. Transforms bitmaps into vector graphics.

Usage: potrace [options] [filename...]
General options:
 -h, --help                 - print this help message and exit
 -v, --version              - print version info and exit
 -l, --license              - print license info and exit
File selection:
 <filename>                 - an input file
 -o, --output <filename>    - write all output to this file
 --                         - end of options; 0 or more input filenames follow
Backend selection:
 -b, --backend <name>       - select backend by name
 -b svg, -s, --svg          - SVG backend (scalable vector graphics)
 -b pdf                     - PDF backend (portable document format)
 -b pdfpage                 - fixed page-size PDF backend
 -b eps, -e, --eps          - EPS backend (encapsulated PostScript) (default)
 -b ps, -p, --postscript    - PostScript backend
 -b pgm, -g, --pgm          - PGM backend (portable greymap)
 -b dxf                     - DXF backend (drawing interchange format)
 -b geojson                 - GeoJSON backend
 -b gimppath                - Gimppath backend (GNU Gimp)
 -b xfig                    - XFig backend
Algorithm options:
 -z, --turnpolicy <policy>  - how to resolve ambiguities in path decomposition
 -t, --turdsize <n>         - suppress speckles of up to this size (default 2)
 -a, --alphamax <n>         - corner threshold parameter (default 1)
 -n, --longcurve            - turn off curve optimization
 -O, --opttolerance <n>     - curve optimization tolerance (default 0.2)
 -u, --unit <n>             - quantize output to 1/unit pixels (default 10)
 -d, --debug <n>            - produce debugging output of type n (n=1,2,3)
Scaling and placement options:
 -P, --pagesize <format>    - page size (default is letter)
 -W, --width <dim>          - width of output image
 -H, --height <dim>         - height of output image
 -r, --resolution <n>[x<n>] - resolution (in dpi) (dimension-based backends)
 -x, --scale <n>[x<n>]      - scaling factor (pixel-based backends)
 -S, --stretch <n>          - yresolution/xresolution
 -A, --rotate <angle>       - rotate counterclockwise by angle
 -M, --margin <dim>         - margin
 -L, --leftmargin <dim>     - left margin
 -R, --rightmargin <dim>    - right margin
 -T, --topmargin <dim>      - top margin
 -B, --bottommargin <dim>   - bottom margin
 --tight                    - remove whitespace around the input image
Color options, supported by some backends:
 -C, --color #rrggbb        - set foreground color (default black)
 --fillcolor #rrggbb        - set fill color (default transparent)
 --opaque                   - make white shapes opaque
SVG options:
 --group                    - group related paths together
 --flat                     - whole image as a single path
Postscript/EPS/PDF options:
 -c, --cleartext            - do not compress the output
 -2, --level2               - use postscript level 2 compression (default)
 -3, --level3               - use postscript level 3 compression
 -q, --longcoding           - do not optimize for file size
PGM options:
 -G, --gamma <n>            - gamma value for anti-aliasing (default 2.2)
Frontend options:
 -k, --blacklevel <n>       - black/white cutoff in input file (default 0.5)
 -i, --invert               - invert bitmap
Progress bar options:
 --progress                 - show progress bar
 --tty <mode>               - progress bar rendering: vt100 or dumb

Dimensions can have optional units, e.g. 6.5in, 15cm, 100pt.
Default is inches (or pixels for pgm, dxf, and gimppath backends).
Possible input file formats are: pnm (pbm, pgm, ppm), bmp.
Backends are: svg, pdf, pdfpage, eps, postscript, ps, dxf, geojson, pgm,
gimppath, xfig.