工业需求工程师和RE工具开发者终于有了一个无需训练就能提升流程图转换精度的方案——EdgeFlow用边缘图做结构先验，直接让VLM的拓扑识别能力跃升，做模型驱动测试的团队值得一试。
工业需求工程中流程图常以静态图片存在，Vision Language Models (VLMs) 在将其转为机器可读模型时，常丢失拓扑关键细节。EdgeFlow 通过向VLM输入添加Canny边缘图作为结构先验，显著提升流程图到Mermaid的转换质量。在真实工业数据集IndusReqFlow上，节点F1提升17.39个百分点，边F1提升16.94个百分点，路径F1提升11.06个百分点。该方法无需标注数据或微调，为工业需求工程提供了一种实用的无训练方案。
EdgeFlow: Edge-Map Augmented VLM-Based Flowchart Processing for Industrial Requirements Engineering
Flowcharts are widely used in industrial requirements, but usually remain embedded as static images. Vision Language Models (VLMs) show promise in the conversion of these flowcharts into machine-readable models for RE activities, yet, when directly applied to flowchart conversion, they often fail on topology-critical visual details. To address this, we propose EdgeFlow that augments a VLM's original input with a deterministically extracted Canny edge map-acting as a structural prior-to improve flowchart-to-Mermaid conversion, without requiring annotated training data or domain-specific model fine-tuning. We evaluate EdgeFlow on IndusReqFlow, a dataset sourced from real-world requirements. Compared with off-the-shelf VLMs, EdgeFlow improves node-level F1 by 17.39 percentage points and edge-level F1 by 16.94 percentage points. At the path level, EdgeFlow improves path F1 by 11.06 percentage points, enabling better support for model-based testing. These results demonstrate that EdgeFlow provides a practical, training-free means to improve topology-preserving flowchart-to-Mermaid conversion for industrial RE. Cross-dataset evaluation results on a public synthetic benchmark show no significant improvement; this highlights the need for diverse benchmarks incorporating industrial data for the comprehensive evaluation of future VLM-based RE tools.