GoTrace

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

Installation

go get github.com/dennwc/gotrace

Usage

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)