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potrace is a utility for tracing a bitmap, which means, transforming a
bitmap into a smooth, scalable image. The input is a bitmap (PBM, PGM,
PPM, or BMP format), and the default output is an encapsulated
PostScript file (EPS). A typical use is to create EPS files from scanned
data, such as company or university logos, handwritten notes, etc. The
resulting image is not "jaggy" like a bitmap, but smooth. It can then be
rendered at any resolution.
potrace can currently produce the following output formats: EPS,
PostScript, PDF, SVG (scalable vector graphics), Xfig, Gimppath, and PGM
(for easy antialiasing). Additional backends might be added in the
future.