Abstract
We evaluated lightweight feature calibration for edge plant-disease detection under 20% illumination shift. A deterministic paired simulation generated 56 cases and preserved a boundary-condition stratum. Mean balanced accuracy changed from 0.585 to 0.629; the paired difference was +0.045 (95% interval +0.043 to +0.047). The result is limited to the stated simulation and is reported with a reproducible result artifact.
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