Add comprehensive model card and pipeline tag

README.md

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-license: mit
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+license: mit
+pipeline_tag: image-feature-extraction
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+# GreenHyperSpectra: A multi-source hyperspectral dataset for global vegetation trait prediction
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+This repository contains models and data associated with the paper **[GreenHyperSpectra: A multi-source hyperspectral dataset for global vegetation trait prediction](https://huggingface.co/papers/2507.06806)**.
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+GreenHyperSpectra introduces a pretraining dataset of real-world cross-sensor and cross-ecosystem hyperspectral samples. This dataset is designed to benchmark trait prediction using semi- and self-supervised methods. The work demonstrates how leveraging GreenHyperSpectra can lead to label-efficient multi-output regression models that outperform state-of-the-art supervised baselines, significantly improving the learning of spectral representations for plant trait prediction.
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+All code and data for this project are available at the official GitHub repository: [https://github.com/GreenHyperSpectra/GreenHyperSpectra](https://github.com/GreenHyperSpectra/GreenHyperSpectra)