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. 2026 Feb 10;17:1747657. doi: 10.3389/fpls.2026.1747657

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Copyright © 2026 Wang, Cao, Luo, Huang, Nie, Zhang, Lu, Cui, An and She.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Three heatmaps (a), (b) and (c) respectively present the correlation analysis results between the colour index, texture index, vegetation index and plant cover. Each heatmap employs a colour scale ranging from -1.0 (blue) to 1.0 (red) to visually represent the strength and spatial distribution patterns of correlations between indices and coverage across different locations. Red areas indicate a strong positive correlation between the index and plant coverage, while blue areas denote negative correlations or no relationship. This clearly reveals the varying contributions of different characteristics towards characterising vegetation conditions. — Correlation analysis heatmap: (a) Color characteristics; (b) Texture characteristics; (c) Vegetation characteristics.