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How do you validate a classifier when the human labelers agree with each other at kappa 0.41?

This story is from 2026-09-17. It is preserved in the archive; the latest stories are on the live feed.

I ran into this building a tongue-photo classifier and it turned into a genuinely unsettled question rather than a solved one. The task: map tongue color, coating, shape, moisture and texture onto categories used in Traditional Chinese Medicine and Ayurveda, the two systems that actually use tongue…

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  1. 2026-09-17 13:18 · r/computervision
    How do you validate a classifier when the human labelers agree with each other at kappa 0.41?

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