GreenMap/yolo11x-blueprint-legend-layout-detector

GreenMap/yolo11x-blueprint-legend-detector

Overview

YOLO11x model trained to detect structural elements inside blueprint legends on architectural and construction drawings.

• Detects legend symbols (hatch patterns and graphical symbols).
• Detects legend descriptions.
• Detects complete legend rows.
• Detects legend continuation blocks.
• Trained on architectural floor plans and construction drawings.

Classes

ID	Class	Purpose
0	legend_symbol	Graphical symbol or hatch pattern representing a construction element or material.
1	legend_description	Text description corresponding to a legend symbol.
2	legend_row	Complete legend entry containing a symbol and its associated description.
3	legend_continuation_block	A block containing the continuous legend elements.

Training Metrics

Validation Metrics

Class	Images	Instances	Precision	Recall	mAP50	mAP50-95
all	68	2821	0.912	0.903	0.918	0.735
legend_symbol	68	907	0.982	0.986	0.993	0.890
legend_description	68	956	0.977	0.984	0.993	0.831
legend_row	68	901	0.962	0.984	0.990	0.799
continuous_elements_block	41	57	0.727	0.655	0.696	0.421

Training

• Base model: YOLO11x
• Task: Object Detection
• Input size: 1472 × 1472
• Framework: Ultralytics YOLO