arXiv Machine Learning By Kinjalk Parth, Sebastian Varela, Andrew D. B. Leakey

RootQuantV2: Adapting a Vision Foundation Model for Root-Trait Regression from Minirhizotron Imagery

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RootQuantV2 adapts a frozen DINOv3 Vision Transformer to predict root length and surface area directly from minirhizotron images, eliminating the need for manually traced masks. By training only 11.9 M parameters (3.78 % of the model), it achieves R² values of 0.950 for length and 0.930 for area, improving RMSE by 24.3 % and 20.7 % over the previous RootQuant CNN approach. The method repurposes existing numeric archives of root traits for high‑throughput, automated phenotyping in field‑grown crops.

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