Robust Video Hashing Based on Multidimensional Scaling and Ordinal Measures

Table 3

Statistical results of hash distances.

Operation	Max	Min	Mean	Standard deviation
Brightness adjustment	29.39	0.00	7.01	0.58
Contrast adjustment	26.57	0.00	8.08	0.21
3×3 Gaussian low-pass filtering	21.73	0.00	6.60	1.41
Salt and pepper noise	55.75	0.00	7.28	0.85
AWGN	80.42	4.00	18.46	0.75
MPEG-2 compression	57.34	2.00	10.89	1.61
MPEG-4 compression	87.90	1.41	10.73	3.68
Random frame dropping	73.93	4.69	28.45	3.42
Random frame insertion	74.66	4.00	27.07	3.22
Frame scaling	20.00	0.00	6.99	0.25
Frame rotation	23.15	2.45	9.21	0.39