提出地图生成质量评估新指标,提升地图真实感与地理合理性。
Map Feature Perception Metric for Map Generation Quality Assessment and Loss Optimization
- 基于要素级深度特征,捕捉地图全局结构与拓扑关系。
- 在多个基准上相比传统损失提升2%至50%性能。
- 适合地图生成、地理信息建模等领域的研究者使用。
在生成式模型驱动的智能制图任务中,合成地图的真实性至关重要。现有方法多采用计算机视觉图像评估指标(如L1、L2、SSIM、FID)计算生成地图与参考地图之间的像素级差异,但这些指标难以捕捉地图的全局特征与空间关联,导致输出存在语义-结构误差。本文提出一种新型地图特征感知度量(MFP),通过提取要素级深度特征,全面编码地图的结构完整性和拓扑关系。实验表明,该度量在评估地图语义特征方面表现更优;结合分类增强后,其在多种生成框架中超越传统损失函数。以MFP作为优化目标时,在多个基准上相较L1、L2、SSIM基线实现2%至50%的性能提升。研究结论表明,显式考虑地图全局属性与空间一致性可显著提升生成模型优化效果,大幅增强合成地图的地理合理性。
原文摘要 · Abstract (English)
In intelligent cartographic generation tasks empowered by generative models, the authenticity of synthesized maps constitutes a critical determinant. Concurrently, the selection of appropriate evaluation metrics to quantify map authenticity emerges as a pivotal research challenge. Current methodologies predominantly adopt computer vision-based image assessment metrics to compute discrepancies between generated and reference maps. However, conventional visual similarity metrics-including L1, L2, SSIM, and FID-primarily operate at pixel-level comparisons, inadequately capturing cartographic global features and spatial correlations, consequently inducing semantic-structural artifacts in generated outputs. This study introduces a novel Map Feature Perception Metric designed to evaluate global characteristics and spatial congruence between synthesized and target maps. Diverging from pixel-wise metrics, our approach extracts elemental-level deep features that comprehensively encode cartographic structural integrity and topological relationships. Experimental validation demonstrates MFP's superior capability in evaluating cartographic semantic features, with classification-enhanced implementations outperforming conventional loss functions across diverse generative frameworks. When employed as optimization objectives, our metric achieves performance gains ranging from 2% to 50% across multiple benchmarks compared to traditional L1, L2, and SSIM baselines. This investigation concludes that explicit consideration of cartographic global attributes and spatial coherence substantially enhances generative model optimization, thereby significantly improving the geographical plausibility of synthesized maps.
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