penpot/tracebitmap.txt

How to trace a bitmap to svg in multiple colors:

Generate the PPM format from PNG:

convert download.png download.ppm

Generate a mask file for each color of the file:

ppmcolormask "#184d47" download.ppm > download-mask1.pbm ppmcolormask "#66462C" download.ppm > download-mask2.pbm

Then trace the bitmap (bitmap -> svg):

potrace --flat -b svg download-mask1.pbm -o download1.svg potrace --flat -b svg download-mask2.pbm -o download2.svg

Extract a list of colors from an image:

convert download.png +dither -colors 10 -unique-colors txt:

Articles:

• http://confluence.concord.org/display/CCTR/Removing%20Antialiasing.html
• http://confluence.concord.org/display/CCTR/Tracing%20Color%20Raster%20Images.html