Actual size

(Squared sediments)

No. of pixels in defect portion

Measured size (mm)

% of Error

Sediment height

(Pixels)

Measured height (mm)

% of

Error

□ 6 mm, 1.5 mm height

42.1

6.1

1.6

10.5

1.54

2.7

□ 9 mm, 2.5 mm height

60.1

8.8

2.2

16.7

2.46

1.6

□ 12 mm, 3.5 mm height

80.5

11.8

1.6

23.2

3.42

2.3