Last week I released Printsight — an open-source CLI tool that detects 3D print defects from a photo using pure OpenCV.

The feedback was consistent: "The text report is useful, but show me where on the print the problems are."

So that's exactly what v0.2 does:

printsight my_print.jpg --annotate # → my_print_annotated.png with color-coded defect markings

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What You Get

Run with the --annotate flag and Printsight saves a marked-up version of your photo:

printsight failed_print.jpg -a

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The output image uses four colors:

Color What it marks

🔴 Red Stringing — thin polylines over detected wisps

🟡 Yellow Layer issues — horizontal bands where regularity is poor

🔵 Blue Warping — circles on lifted corners

🟢 Green Reference line — where the bottom edge should be

Plus a score overlay in the top-right corner.

How the Annotations Work

Stringing (Red)

The stringing detector uses two methods in parallel:

Hough Line…