AI tracing
How AI mask generation works and what to expect.
How it works
After you mark the paper corners, the image is perspective-corrected so the paper fills the frame at the correct aspect ratio. This corrected image is sent to a vision model which generates a black-and-white silhouette mask for each tool.
The AI also attempts to label each tool (e.g. "pliers", "screwdriver"). Labels are shown in the tool library but don't affect the outlines.
What the AI sees
You can expand the "What we send to the model" panel during tracing to see the exact prompts. The mask prompt asks for white silhouettes on a black background. The label prompt asks for simple tool names.
Manual tracing
If you prefer, you can skip the AI step. Click *Manual* to download the corrected image, create a B&W mask yourself (in any image editor), and upload it back. The prompt text is shown so you know what format to follow.
When tracing goes wrong
The AI handles most tool shapes well, but may struggle with:
- Very thin tools (e.g. needles, drill bits) — outlines may be incomplete.
- Transparent or reflective tools — the mask may include reflections.
- Tools that overlap the paper edge — only the portion on the paper is traced.
If a trace isn't right, you can edit the vertices manually in the tool editor.