What is VTracer?
An open-source raster-to-vector tracing library written in Rust. Produces high-quality vector output for color images. The default vectorization engine in many modern textile AI platforms.
In detail
VTracer is an open-source vectorization engine focused on producing clean SVG output from arbitrary raster images. It performs three steps: (1) color quantization — reduce the image to N colors via clustering; (2) layer extraction — separate each color into its own raster layer; (3) tracing — convert each layer's pixel mask to Bezier curves via gradient-following algorithms. Compared to ImageTracer (a JavaScript alternative), VTracer is faster on color images, produces tighter Bezier control, and handles smooth gradients better. Texloom Studio uses VTracer for color vectorization and ImageTracer for line-art tracing where ImageTracer's 'ignoreWhite' mode is useful. VTracer's strength is path simplification on photographic and continuous-tone source imagery — it produces SVGs with significantly fewer nodes per curve than ImageTracer or Photoshop's Image Trace, leading to smaller files and easier post-edit. The trade-off is processing time on very large images and limited fine-grained control over corner detection and noise filtering.
Example
A 1024×1024 watercolor floral with 12 distinct colors vectorizes via VTracer into a 47-layer SVG with 1,200 Bezier curves total in 2.3 seconds on a modern laptop. Output file: 78 KB. The SVG renders cleanly at any size without quality loss.