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Life & fun · February 12, 2026

IG

I generated a "stress test" of 200 rare defects from 7 real photos

Hello HN, I work on vision systems for structural inspection. A common pain point is usually that while we have a lot of "healthy" images, we often lack a reliable "Golden Set" of rare failures (like shattered porcelain) to validate our models before deployment. You can't trust your model's recall if your test set only has 5 examples of the failure mode for example. So to fix this, I built a pipeline to generate datasets. In this example, I took 7 real-world defect samples, extracted their topology/texture, and procedurally generated 200 hard-to-detect variations across different…

I generated a "stress test" of 200 rare defects from 7 real photos launched on February 12, 2026 with 6 votes, #1,572 of 16,627 launches that month and more than 75% of that year's launches.

Alternativestop 9% of February 2026

What it does

In the maker’s words, at launch

Hello HN, I work on vision systems for structural inspection. A common pain point is usually that while we have a lot of "healthy" images, we often lack a reliable "Golden Set" of rare failures (like shattered porcelain) to validate our models before deployment. You can't trust your model's recall if your test set…

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