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Table 4 The ME and STD of OL for the JPEG + JPEG manipulation

From: Detection of tampered region for JPEG images by using mode-based first digit features

Size

QF2

75

80

85

90

95

150 Ă— 150

ME

STD

ME

STD

ME

STD

ME

STD

ME

STD

QF1

50

0.8905

0.0332

0.8930

0.0124

0.8756

0.0298

0.8691

0.0398

0.8170

0.1100

 

55

0.8981

0.0292

0.8875

0.0309

0.8794

0.0300

0.8756

0.0370

0.8413

0.0777

 

60

0.8989

0.0563

0.8909

0.0274

0.8921

0.0126

0.8728

0.0311

0.8485

0.0747

 

65

0.8731

0.0823

0.9006

0.0267

0.8843

0.0248

0.8804

0.0248

0.8551

0.0513