A Comparison Study of Edge Line Estimation Algorithms for Dimensional Quality Assessment of Precast Concrete Slabs

Table 1

Dimensional Tolerance for Precast and Prestressed Concrete Elements [21, 22].

Feature	Dimensional attribute (tolerance)
Dimension	Length (±6 mm); width (±6 mm); thickness (±6 mm)
Position	Length (horizontal (±6 mm); vertical (±6 mm))
Straightness	Size (±10 mm)
Squareness	Size (±3 mm)