Adaptive Dual-Constrained Line Aggregation for Cross-Paradigm Line Segment Detection

Abstract

Line segment detection has been studied for decades, yet existing methods are typically designed for different detection paradigms. Generic line segment detectors aim to recover all meaningful line segments in an image, whereas recent deep-learning-based approaches mainly target wireframe line segments that describe salient geometric structures. Because these paradigms follow different detection objectives, methods optimized for one often perform poorly on the other. In this work, we propose Adaptive Dual-Constrained Line Aggregation (ADLA), a line extraction framework designed to operate across different line segment detection paradigms. Starting from an edge strength map, ADLA progressively aggregates pixels into candidate line segments under two complementary geometric constraints: orientation coherence and bounded orthogonal distance to an adaptively estimated line model. During aggregation, the line centroid and orientation are dynamically updated using the accumulated supporting pixels, progressively improving the geometric consistency of the estimated line. Edge strength information is further incorporated into orientation estimation, seed selection, model refinement, and segment validation, reducing the need for extensive parameter tuning. Experiments on three publicly available datasets covering generic, wireframe, and Manhattan line segment detection demonstrate consistently strong performance across substantially different annotation settings. ADLA achieves (F^H) scores of 0.8665 on YorkUrban-LineSegment dataset, 0.8720 on ShanghaiTech dataset, and 0.7297 on YorkUrban dataset. These results demonstrate the effectiveness and flexibility of ADLA across different line segment detection paradigms. The source code for this work is publicly available at https://github.com/ChenguangTelecom/adla .