Concrete surface evaluation based on the reflected TLS laser beam’s intensity image classification

Figures & Tables

Class	Description	Reference fields

		Station 501
1	Clean concrete	1, 2
2	Concrete covered with mosses to a lower extent	3, 4, 7
3	Concrete covered with mosses to a higher extent	-
4	Concrete covered with mosses	9
5	Infill areas with material of different properties (such as. cement)	5, 6, 8

Class	Sample fields/reference	Description	I	Minimum	Maximum	Mean	Standard deviation	Dominant (range of values)
Ecker Dam – Leica C10 – Station 501

1	2	Clean concrete	I Registered Intensity value in standardised sample	−1,630	−1,274	−1,427.42	36.05	−1,455 to −1,397

			Iavg5 Average Intensity for 5 cm × 5 cm	−1,456	−1,396	−1,425.60	14.38	−1,440 to −1,409

			Iavg10 Average Intensity for 10 cm × 10 cm	−1,455	−1,403	−1,427.00	11.68	−1,435 to −1,418

2	4	Concrete covered with mosses to a small extent	I Registered Intensity value in standardised sample	−1,643	−1,207	−1,415.91	45.10	−1,461 to −1,378

			Iavg5 Average Intensity for 5 cm × 5 cm	−1,452	−1,351	−1,415.34	19.75	−1,429 to −1,392

			Iavg10 Average Intensity for 10 cm × 10 cm	−1,441	−1,389	−1,412.77	12.83	−1,423 to −1,403

3	-	Concrete covered with mosses to a high extent	Not designated

4	−	Concrete covered with mosses	Identification error caused by significant surface dampness

5	6	Infill areas with material of different properties (such as cement)	I Registered Intensity value in standardised sample	−1,403	−1,311	−1,357.21	18.69	−1,380 to −1,332

			Iavg5 Average Intensity for 5 cm × 5 cm	−1,442	−1,299	−1,358.26	30.58	−1,366 to −1,340

			Iavg10 Average Intensity for 10 cm × 10 cm	−1,380	−1,322	−1,350.20	18.26	−1,357 to −1,353