The article presents a comparative analysis of the results obtained from the automatic determination of crack width in reinforced concrete structures using photogrammetric 3D targets and the manual method using a Brinell microscope. It also outlines the general conditions required to obtain accurate crack width measurements when performing photogrammetric surveys. The experience of using photogrammetric targets for determining crack width in reinforced concrete structures in Russia is limited due to the novelty of the method, the high cost of specialized equipment, and the complexity of data processing. Proper use of photogrammetric targets can significantly speed up the process of measuring crack width in monolithic reinforced concrete structures and improve measurement accuracy. This technology is particularly relevant for monitoring or field testing of structures that require regular crack width control.

Keywords: photogrammetric targets, monitoring, crack width, reinforced concrete, software suite, camera, focal length, lighting.