Fig. 1From: 2D image-based crack monitoring: an affordable, sufficient and non-invasive technique for the democratization of preventive conservation of listed buildingsMeasurement stand (cracked wooden chipboard) and laboratory setup for the in-lab test. In the lowest position, the calliper; in the middle, the comparator; and above, the targets used for 3D photogrammetry and 2D image-based crack monitoringBack to article page