Master Thesis - Fachbereich Informatik

5.3. EXPERIMENTAL RESULTS 111
Length [mm]
Length [mm]
52
51.5
51
50.5
50
49.5
49
48.5
48
52
51.5
51
50.5
50
49.5
49
48.5
48
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
Measurement number
(a) 21 black tubes at 20m/min
measurements
upper tolerance
lower tolerance
resulting mean length
ground truth
boundaries
0 10 20 30 40 50 60 70 80 90 100 110
Measurement number
(b) 17 transparent tubes at 20m/min
measurements
upper tolerance
lower tolerance
resulting mean length
ground truth
boundaries
Figure 5.7: Measuring results at 20m/min for (a) black and (b) transparent tubes. The red
crosses indicate single measurements, while the dashed vertical lines represent the boundaries
between measurements belonging to the same tube. The averaged total length as well as the
corresponding ground truth length are also shown in the plots. All measured tubes of this
sequence meet the tolerances. However, while the transparent tubes have approximately the
target length of 50mm on average, the mean of the black tubes is slightly shifted, i.e. all tubes
tend to be shorter than the target length.