Table 19 Data processing steps and results.

From: Measuring political polarization through visible interactions between religious and non-religious citizens

Steps

Step description

#Videos

Video duration

#Frames

#Humans detected

1

Identification of YouTube Videos

1439

NA

NA

NA

2

Downloading and Frame Extraction

1359

49 h:33 min:36 s

178,413

NA

3

Object Detection Step:

Dropping frames with no humans

1359

Model 2:

Model 2:

Model 2:

35 h:16 min:22 s (71.2%)

126,981 (71.2%)

500,709

Model 4:

15 h:50 min:59 s (32.0%)

Model 4:

57,060 (32.0%)

Model 4:

110,769

Model 5:

Model 5:

Model 5:

35 h:8 min:5 s (70.9%)

126,486 (70.9%)

489,349

4

Distance Estimation Step I:

Dropping frames with < 3 human objects

1359

Model 2:

Model 2:

Model 2:

21 h:31 min:29 s (43.4%)

77,490 (43.4%)

427,777 (85.4%)

Model 4:

3 h:45 min:28 s (7.6%)

Model 4:

13,527 (7.6%)

Model 4:

53,802 (48.6%)

Model 5:

Model 5:

Model 5:

21 h:37 min:4 s (43.6%)

77,824 (43.6%)

417,487 (85.3%)

5

Distance Estimation Step II:

Dropping frames with a single class

1359

Model 2:

Model 2:

Model 2:

13 h:50 min:52 s (27.9%)

49,852 (27.9%)

301,311 (60.2%)

Model 4:

2 h:0 min:32 s (4.1%)

Model 4:

7234 (4.1%)

Model 4:

30,257 (27.3%)

Model 5:

Model 5:

Model 5:

4 h:40 min:33 s (9.4%)

16,834 (9.4%)

109,381 (22.4%)

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