提出自适应双约束线段聚合方法,统一处理通用与线框线段检测。
Adaptive Dual-Constrained Line Aggregation for Robust Generic and Wireframe Line Segment Detection
- 通过动态更新线模型参数,实现几何一致性和距离约束的自适应聚合。
- 在三个公开数据集上表现优于或相当现有方法,兼具高精度与低调参需求。
- 适合需要兼顾通用与线框检测的场景,如图像分析与自动驾驶系统。
图像中的线段检测已研究数十年,现有方法可分为两类:通用线段检测器和线框线段检测器。通用检测器旨在识别图像中所有有意义的线段,传统方法多属此类;而近年基于深度学习的方法多为线框检测器,仅关注具有几何意义且空间支撑大的线段。由于设计目标差异,两类方法在对方任务上表现不佳,极少有方法能同时在两者上保持鲁棒性能。本文提出一种高效统一框架,基于自适应双约束线段聚合(ADLA)算法。ADLA仅在满足双重几何约束时才聚合像素成候选线段:(1) 方向一致性,(2) 到自适应估计线模型的垂直距离受限。关键在于,候选线段的方向与质心随新像素不断动态更新,实现渐进式模型优化,提升几何准确性。此外,通过利用边缘强度图进行方向估计与线段验证,大幅降低参数调优需求。在三个公开数据集上的大量实验表明,ADLA性能优于或媲美现有方法,凸显其鲁棒性、通用性与实用性。
原文摘要 · Abstract (English)
Line segment detection in images has been studied for several decades. Existing methods can be roughly divided into two categories: generic line segment detectors and wireframe line segment detectors. Generic detectors aim to detect all meaningful line segments in images and traditional approaches usually fall into this category. Recent deep learning based approaches are mostly wireframe detectors. They detect only line segments that are geometrically meaningful and have large spatial support. Due to the difference in the aim of design, methods designed for one paradigm often perform poorly on the other, and few approaches demonstrate robust performance across both tasks. In this work, we propose a robust framework that is efficient for both tasks based on an Adaptive Dual-Constrained Line Aggregation (ADLA) algorithm. ADLA aggregates pixels into candidate line segments only if they satisfy dual geometric constraints: (1) orientation coherence and (2) bounded orthogonal distance to an adaptively estimated line model. Crucially, the parameters of the candidate line (its orientation and centroid) are dynamically updated as new pixels are incorporated. This progressive model refinement improves geometric accuracy. Moreover, by leveraging edge strength maps in orientation estimation and line segment validation, ADLA requires little parameter tuning. Extensive experiments on three publicly available datasets demonstrate that ADLA achieves competitive or superior performance than previous methods, highlighting its robustness, versatility, and practical usability.
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