Table 1: Degradation levels of individual distortion [11]

Degradation Level	1	2	3	4	5	6	7	8	9	10
Gaussian blur	[0, 0.5]	[0.5, 1]	[1, 1.5]	[1.5,2]	[2, 2.5]	[2.5, 3]	[3, 3.5]	[3.5,4]	[4, 4.5]	[4.5, 5]
Gaussian noise	[0, 5]	[5, 10]	[10, 15]	[15, 20]	[20, 25]	[25, 30]	[30, 35]	[35,40]	[40, 45]	[45, 50]
JPEG compression	[80, 100]	[60, 80]	[50, 60]	[40, 50]	[35, 40]	[30, 35]	[25, 30]	[20, 25]	[15, 20]	[10, 15]