WARNING: This library is deprecated in favor of gotranspile/gotrace. It will not receive any updates.

Pure Go implementation of Potrace vectorization library. Supports simple SVG output generation.

Also includes cgo bindings for the original Potrace library.

Original image

Vectorized image

go get github.com/dennwc/gotrace

Process image with an alpha channel, generate SVG:

bm := gotrace.NewBitmapFromImage(img, nil)
paths, _ := gotrace.Trace(bm, nil)
gotrace.WriteSvg(file, img.Bounds(), paths, "")

Custom threshold function:

bm := gotrace.NewBitmapFromImage(img, func(x, y int, c color.Color) bool {
    r, g, b, _ := c.RGBA()
    return r + g + b > 128
})
paths, _ := gotrace.Trace(bm, nil)