Measuring the Angular Velocity of a Propeller with Video Camera Using Electronic Rolling Shutter

Table 2

Angular velocity of the two-blade propeller.

Frame number	Center deviation (pixel)	Actual velocity (r/s)	Measured velocity (r/s)	Relative error of velocity (%)
1	(5, 2)	8.51	8.27	2.8
2	(0, 1)	8.53	8.36	2.0
3	(3, 5)	8.57	8.44	1.5
4	(5, −2)	8.59	8.51	0.9
5	(6, −1)	15.88	15.37	3.2
6	(3, 5)	15.91	15.72	1.2
7	(−1, 3)	15.93	15.87	0.3
8	(5, −2)	15.95	16.12	1.1
9	(1, −7)	21.87	21.32	2.5
10	(0, 1)	22.00	21.44	2.6
11	(3, 4)	22.11	22.00	0.1
12	(−3, −2)	22.18	22.10	0.3
13	(−8, −2)	25.07	25.31	1.0
14	(0, 3)	25.11	25.32	0.8
15	(−3, 5)	25.18	25.52	1.4
16	(−5, 2)	25.21	25.73	2.1