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docs(decision): restore the far-unknown section's opening sentence

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An earlier edit dropped the paragraph that introduces the section, leaving the
heading followed straight by a sentence starting 'and it hid...'. Restored, and
the document now has no heading without a blank line before it.
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kiyo9w 2026-09-29 04:43:02 +09:00
parent c00b00499f
commit 4b00323ae2
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recognization/docs/research/2026-09-28-recognition-architecture/DECISION.md
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@ -901,8 +901,10 @@ out of "210g"), and percentages are excluded because "カロリー 50% カット
claim about the contents. Measured on the corrected labels, full resolution:
precision 86% -> 91%, false accepts 8 -> 5, coverage unchanged at 79%.
### Far unknowns: the accept lines were tuned on a shelf that has no unknowns
Every threshold in this document was fitted on image6, where each crop is a
facing of a product the shelf actually holds. That is a closed-set tuning set,
and it hid the far-unknown rate completely: the shipped lane accepted 82 of
2650 crops from 60 Wikimedia Commons supermarket photos of milk, soy and snack
shelves - 3.09 %, against G3's 1 %.