Why Inkscape Vectorization Can Look Rough
Rough Inkscape traces usually point to source noise, compression artifacts, unsuitable trace settings, or insufficient path cleanup. This guide provides a diagnostic checklist without ranking Inkscape against another engine.
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Start with the source. Low resolution, JPEG blocks, soft shadows, and weak contrast create boundaries that any tracing workflow may reproduce as unwanted geometry. Use the cleanest owned source available and avoid repeated lossy saves.
Then review Trace Bitmap settings for the image class. Brightness cutoff, edge detection, and color passes solve different problems; too many passes can create fragments, while an unsuitable threshold can erase thin details or close intentional holes.
Finally inspect the paths. Look for open contours, stair-step edges, micro-fragments, excessive nodes, and altered negative space. Simplification can help, but it should be followed by visual and structural review because aggressive simplification can also remove intended detail.