Converting Raster Artwork to Vector for Laser Cutting

Why Vector Matters for Laser Cutting When you send a JPG or PNG to a laser as a cut path, the software has to guess where the edges are from a blurry grid of pixels. The result is a jagged or over-burnt path with poor edge quality. A vector file contains exact mathematical paths — the laser follows them perfectly with no guessing. Raster (JPG/PNG): grid of colored pixels — good for engraving photos Vector (SVG/DXF/AI): mathematical curves and lines — required for precision cutting Any artwork you want to cut rather than engrave needs to be vector. This guide shows how to convert in five popular tools. -- LightBurn (Easiest for Laser Users) LightBurn has a built-in trace tool that works directly with imported images. 1. Import your JPG/PNG: File → Import 2. Select the image on the canvas 3. Open Trace: Tools → Trace Image (or click the Trace button in the toolbar) 4. Threshold slider — controls which pixel brightness becomes a cut line. Move right to trace finer detail, left to simplify 5. Smooth — reduces the number of nodes in curves (higher = smoother but less accurate) 6. Optimize — merges very close or parallel lines (use for clean output) 7. Click OK — LightBurn creates vector paths on top of your image 8. Delete the original image — leave only the vector paths 9. Assign the paths to a cut layer (red) vs engrave layer (filled) Best for: Simple logos, silhouettes, clipart. Not ideal for complex multi-color artwork. Tip: Set threshold to where your design is fully closed — no gaps in the outline. A gap in the vector becomes a gap in your cut. -- Inkscape (Best Free Option — Full Control) Inkscape is a professional vector editor with powerful tracing. Free and open source. 1. File → Import your image 2. Select the image 3. Path → Trace Bitmap (Shift+Alt+B) 4. Choose your mode: - Brightness Cutoff — traces based on light/dark threshold. Best for high-contrast logos and line art. Move the slider until preview looks right. - Edge Detection — finds the edges between areas. Good for illustrations with defined outlines. - Color Quantization — traces multiple colors separately. Useful for multi-layer designs. 5. Click OK — a vector path is generated on top of the image 6. Move the vector off the image to see it clearly 7. Delete the original image 8. Path → Simplify (Ctrl+L) to reduce excess nodes while keeping the shape 9. File → Save As → SVG or File → Save as DXF for LightBurn/CAM import Cleaning up nodes: Select path → Node editor (N key) → select all nodes → Extensions → Modify Path → Flatten Beziers (removes unnecessary complexity). Tip: For multi-color designs, trace each color separately with Trace Bitmap by temporarily adjusting the image before each trace, then combine layers. -- Adobe Illustrator (Best for Complex Artwork) Illustrator's Image Trace is the most powerful and gives the most control. 1. File → Place your image 2. Select the image 3. Window → Image Trace to open the panel 4. Choose a Preset as starting point: - High Fidelity Photo — maximum detail, many paths (slow to cut) - Low Fidelity Photo — simplified shapes - 3 Colors / 6 Colors — posterized color separations - Shades of Gray — grey values as shapes - Black and White Logo — best for cutting silhouettes - Sketched Art — for hand-drawn artwork - Technical Drawing — for line art and blueprints 5. Adjust Threshold (for B&W) or Colors (for color modes) 6. Paths: controls how closely the vector follows the original — higher = more accurate but more nodes 7. Noise: ignores small details below this pixel count — raise to clean up speckle 8. Click Expand in the control bar — converts live trace to editable paths 9. Object → Ungroup — separates individual shapes 10. File → Export → SVG or Save as AI then re-export Tip for cutting: After expanding, select all and do Object → Compound Path → Make to combine overlapping shapes. Then use Pathfinder → Unite to merge adjacent shapes into single clean outlines. -- Affinity Designer (Best Value Paid Option) Affinity Designer has bitmap tracing built into both desktop and iPad versions. 1. Place your image: File → Place 2. Select the image with the pointer tool 3. Layer → Rasterize if needed (some images need this first) 4. From the top menu: Layer → Live Trace (or right-click → Trace Bitmap) 5. The trace panel appears with sliders: - Threshold — controls black/white split point - Smooth — reduces curve complexity - Minimum area — ignores small features below this size (pixels) - Corner size — controls how sharp corners are preserved 6. Toggle Preview to see the result in real-time 7. When satisfied click Trace 8. The result is a live trace object — click Expand or double-click to access individual paths 9. File → Export → SVG for laser import Tip: Affinity Designer lets you trace on the iPad with Apple Pencil to touch up nodes directly — very intuitive for cleanup work. -- CorelDraw (Industry Standard for Sign Shops) CorelDraw's PowerTRACE is extremely capable, especially for professional sign and cut work. 1. File → Import your image 2. Select the image 3. Bitmaps → Outline Trace → Logo (for most laser cutting work) or: - Centerline Trace — traces the center of thin lines (good for pen plotters and line engraving) - Outline Trace → Clipart — for clean geometric art - Outline Trace → High Quality Image — maximum detail 4. PowerTRACE dialog opens: - Detail slider — higher = more faithful to original - Smoothing — reduces node count - Corner smoothness — controls how sharp corners appear - Delete original — removes raster after tracing 5. Color Mode: set to Black and White for cutting paths 6. OK to apply 7. Arrange → Ungroup All to separate paths 8. File → Export → SVG or DXF for laser/CNC import CorelDraw Advantage: PowerTRACE handles complex multi-color designs better than most tools. The Centerline mode is unique — essential for single-line engraving paths. -- Universal Tips for Clean Vectors 1. Start with a high-resolution image — the tracer can only find what's there 2. Increase source contrast before tracing — pure black on white traces perfectly 3. Reduce colors — posterize or threshold the image before tracing 4. Clean up nodes after tracing — delete stray paths, merge duplicates 5. Check for closed paths — open paths will not cut cleanly (laser misses the start/end connection) 6. Scale correctly — set document units to mm, ensure your design is actual size before export 7. Test with engrave first — before committing to a cut, run the vector as a low-power engrave to verify path placement

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