Fig. 1
From: Automatic damage detection and localization of ancient city walls—a case study of the Great Wall
The blue dashed boxes represent three stages for describing the proposed method: Satge I (Inspection): Sample defensive forts used for dataset construction. Stage II (Phase 1: detection): The input dataset is processed by Improved-YOLOv5n to identify brick missing locations. Stagel III (Phase 2: localization): Three key steps for brick missing edge localization, including bounding box cropping, image segmentation and image measurement.
