Representation Invariance Issues in Multimodal Optical Spectra Models
October 29, 2026
Changing the representation of optical spectra, such as moving from nanometer tables to photon-energy tables, can shift model accuracy by up to 41 percentage points. Testing on models like d3-nano and Qwen3.5-2B reveals significant inconsistency in how they handle equivalent data formats.
HOW THIS AFFECTS YOU
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builderBe aware that the way you format scientific data in tables or plots can drastically change model performance.
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researcherYou must ensure multimodal models are invariant to data representation when working with scientific spectra.