AutoTrace vs ImageTracerJS

AutoTrace converts bitmap images into vector graphics, with tracing options for outlines or centerlines. It can reduce colors and despeckle images to reduce noise, and its listed maximum color count is 256. Input formats include PNG, BMP, TGA, PNM, and GF; ImageMagick or GraphicsMagick can add JPEG, TIFF, GIF, and other formats. Outputs include SVG, EPS, PDF, AI, DXF, CGM, EMF, MIF, ER, and Fig. The project documents command-line conversion and use through the libautotrace library. It is free and listed for Linux, macOS, and Windows. Installation options include package managers for macOS, Linux, and FreeBSD, Windows installers, or building from source. Source builds require a C compiler and GLib 2.58 or newer; libpng and ImageMagick or GraphicsMagick are optional dependencies. The program is licensed under GPL v2 or later, while the library uses LGPL v2.1 or later. The README directs users to the issue tracker and describes the graphical frontend as inactive. Version 0.31.10 is listed as the latest release.

ImageTracerJS is a JavaScript raster-image tracer that converts image data into SVG vector output. It can run in a browser by loading its JavaScript file and calling tracing functions, or in Node.js through a command-line interface. Its API returns SVG strings or tracedata for further processing. Browser-only asynchronous functions and synchronous ImageData functions are available for browsers and Node.js. Tracing can be configured through an options object or presets, including posterized, grayscale, detailed, and artistic variants. Controls cover line and spline error thresholds, path omission, corner enhancement, color sampling, palette size, layering, SVG rendering, and blur preprocessing. The command-line interface supports nearly all options, with pal and layercontainerid as exceptions. Node.js image loading requires an external library because Node.js lacks built-in canvas and DOM support. The project is also available as an Inkscape extension. ImageTracerJS is free under the Unlicense, which permits use, modification, and distribution for commercial or non-commercial purposes, with no warranty. The project notes that large images or many layers can trigger out-of-memory errors and that error handling is limited.