Skip to main content

Table 1 Examples images before and after being shared and downloaded from social media platforms. The image size and the luminance quantization tables used for the last JPEG compression are reported in each case, showing notable differences between different versions

From: Media forensics on social media platforms: a survey

Native Shared with Facebook Shared with Flickr Shared with Twitter
1920 × 2560 1536 × 2048 1536 × 2048 900 × 1200
\(\left [\begin {array}{cccccccc} 1&1&1&1&1&1&1&1\\ 1&1&1&1&1&1&1&1\\ 1&1&1&1&1&1&1&1\\ 1&1&1&1&1&1&1&1\\ 1&1&1&1&1&1&1&1\\ 1&1&1&1&1&1&1&1\\ 1&1&1&1&1&1&1&1\\ 1&1&1&1&1&1&1&1\\ \end {array}\right ]\) \(\left [\begin {array}{cccccccc} 7& 5& 5& 7&11 & 18 & 23 & 28\\ 6& 6& 6& 9&12 & 27 & 28 & 25\\ 6& 6& 7 & 11 & 18 & 26 & 32 & 26\\ 6& 8&10 & 13 & 23 & 40 & 37 & 29\\ 8& 10 & 17 & 26 & 31 & 50 & 47 & 35\\ 11 & 16 & 25 & 29 & 37 & 48 & 52 & 42\\ 23 & 29 & 36 & 40 & 47 & 56 & 55 & 46\\ 33 & 42 & 44 & 45 & 52 & 46 & 47 & 46 \end {array}\right ]\) \(\left [\begin {array}{cccccccc} 4 & 3 & 3 & 4 & 7 & 11 & 14 & 17\\ 3 & 3 & 4 & 6 & 7 & 17 & 17 & 15\\ 4 & 4 & 4 & 7 & 11 & 16 & 20 & 16\\ 4 & 5 & 6 & 8 & 14 & 25 & 22 & 17\\ 5 & 6 & 10 & 16 & 19 & 31 & 29 & 22\\ 7 & 10 & 15 & 18 & 23 & 29 & 32 & 26\\ 14 & 18 & 22 & 25 & 29 & 34 & 34 & 28\\ 20 & 26 & 27 & 28 & 32 & 28 & 29 & 28 \end {array}\right ]\) \(\left [\begin {array}{cccccccc} 5 & 3 & 3 & 5 & 7 & 12 & 15 & 18\\ 4 & 4 & 4 & 6 & 8 & 17 & 18 & 17\\ 4 & 4 & 5 & 7 & 12 & 17 & 21 & 17\\ 4 & 5 & 7 & 9 & 15 & 26 & 24 & 19\\ 5 & 7 & 11 & 17 & 20 & 33 & 31 & 23\\ 7 & 11 & 17 & 19 & 24 & 31 & 34 & 28\\ 15 & 19 & 23 & 26 & 31 & 36 & 36 & 30\\ 22 & 28 & 29 & 29 & 34 & 30 & 31 & 30 \end {array}\right ]\)
Native Shared with Whatsapp Shared with Telegram Shared with Messenger
1920 × 2560 1200 × 1600 1200 × 1600 1000 × 1334
\(\left [\begin {array}{cccccccc} 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1 \end {array}\right ]\) \(\left [\begin {array}{cccccccc} 6 & 4 & 4 & 6 & 10 & 16 & 20 & 24\\ 5 & 5 & 6 & 8 & 10 & 23 & 24 & 22\\ 6 & 5 & 6 & 10 & 16 & 23 & 28 & 22\\ 6 & 7 & 9 & 12 & 20 & 35 & 32 & 25\\ 7 & 9 & 15 & 22 & 27 & 44 & 41 & 31\\ 10 & 14 & 22 & 26 & 32 & 42 & 45 & 37\\ 20 & 26 & 31 & 35 & 41 & 48 & 48 & 40\\ 29 & 37 & 38 & 39 & 45 & 40 & 41 & 40 \end {array}\right ]\) \(\left [\begin {array}{cccccccc} 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1\\ 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1 \end {array}\right ]\) \(\left [\begin {array}{cccccccc} 2 & 2 & 2 & 3 & 5 & 6 & 8 & 10\\ 2 & 2 & 2 & 3 & 5 & 6 & 8 & 10\\ 2 & 2 & 3 & 5 & 6 & 8 & 10 & 12\\ 3 & 3 & 5 & 6 & 8 & 10 & 12 & 14\\ 5 & 5 & 6 & 8 & 10 & 12 & 14 & 15\\ 6 & 6 & 8 & 10 & 12 & 14 & 15 & 15\\ 8 & 8 & 10 & 12 & 14 & 15 & 15 & 15\\ 10 & 10 & 12 & 14 & 15 & 15 & 15 & 15 \end {array}\right ]\)