A Crack Identification Method for Concrete Structures Using Improved U-Net Convolutional Neural Networks

Table 1

Measurement parameters of the ACTIS system.

Item	Parameter
Working distance (precision)	50 m (0.05 mm)
The measured area	3 m × 4  m
Working angle	360°
Amount of data stored	64 G
Speed of detection	260 m^2/h
Suitable object	Plane, surface, cylinder
Output format	CAD, Exelt, TXT
Image resolution	7360 × 4912PIX