Research Article
A Novel Psychovisual Threshold on Large DCT for Image Compression
Table 2
The quantization value on each frequency order for luminance.
| 16 | 12 | 9 | 9 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 11 | 11 | 16 | 16 | 23 | 23 | 34 | 11 | 9 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 11 | 11 | 16 | 16 | 23 | 23 | 34 | 34 | 10 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 11 | 11 | 15 | 16 | 23 | 24 | 34 | 35 | 47 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 11 | 12 | 15 | 16 | 22 | 24 | 33 | 35 | 46 | 47 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 11 | 12 | 15 | 16 | 22 | 24 | 33 | 35 | 46 | 47 | 58 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 11 | 12 | 15 | 17 | 22 | 24 | 33 | 35 | 46 | 48 | 58 | 58 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 11 | 12 | 15 | 17 | 22 | 25 | 33 | 36 | 45 | 48 | 58 | 59 | 66 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 11 | 12 | 15 | 17 | 22 | 25 | 32 | 36 | 45 | 48 | 57 | 59 | 66 | 66 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 10 | 12 | 15 | 17 | 21 | 25 | 32 | 36 | 45 | 48 | 57 | 59 | 66 | 66 | 68 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 10 | 12 | 15 | 17 | 21 | 25 | 32 | 37 | 45 | 49 | 57 | 59 | 65 | 66 | 68 | 68 | 7 | 7 | 7 | 8 | 8 | 9 | 10 | 12 | 14 | 17 | 21 | 26 | 32 | 37 | 44 | 49 | 57 | 60 | 65 | 66 | 68 | 69 | 65 | 7 | 7 | 8 | 8 | 9 | 10 | 13 | 14 | 18 | 21 | 26 | 32 | 37 | 44 | 49 | 56 | 60 | 65 | 67 | 68 | 69 | 66 | 65 | 7 | 8 | 8 | 10 | 10 | 13 | 14 | 18 | 21 | 26 | 31 | 37 | 44 | 50 | 56 | 60 | 65 | 67 | 68 | 69 | 66 | 65 | 56 | 8 | 8 | 10 | 10 | 13 | 14 | 18 | 20 | 26 | 31 | 38 | 43 | 50 | 56 | 60 | 65 | 67 | 68 | 68 | 66 | 64 | 57 | 56 | 8 | 10 | 10 | 13 | 14 | 18 | 20 | 27 | 31 | 38 | 43 | 50 | 56 | 61 | 64 | 67 | 68 | 68 | 66 | 64 | 57 | 55 | 42 | 10 | 10 | 13 | 14 | 18 | 20 | 27 | 31 | 38 | 43 | 51 | 56 | 61 | 64 | 67 | 68 | 68 | 66 | 64 | 58 | 55 | 43 | 41 | 10 | 13 | 14 | 18 | 20 | 27 | 31 | 39 | 42 | 51 | 55 | 61 | 64 | 67 | 68 | 68 | 67 | 64 | 58 | 54 | 44 | 40 | 27 | 13 | 14 | 19 | 20 | 28 | 31 | 39 | 42 | 51 | 55 | 61 | 64 | 67 | 68 | 68 | 67 | 63 | 59 | 53 | 45 | 39 | 28 | 26 | 13 | 19 | 20 | 28 | 30 | 39 | 42 | 52 | 55 | 62 | 64 | 68 | 68 | 68 | 67 | 63 | 59 | 53 | 46 | 38 | 29 | 24 | 19 | 19 | 29 | 30 | 39 | 41 | 52 | 55 | 62 | 63 | 68 | 68 | 68 | 67 | 63 | 60 | 52 | 47 | 37 | 30 | 20 | 19 | 29 | 30 | 40 | 41 | 53 | 55 | 62 | 63 | 68 | 68 | 68 | 67 | 62 | 60 | 51 | 48 | 36 | 31 | | 29 | 30 | 40 | 41 | 53 | 54 | 62 | 63 | 68 | 68 | 68 | 68 | 62 | 61 | 51 | 48 | 35 | 32 | | 30 | 40 | 41 | 54 | 54 | 62 | 63 | 68 | 68 | 68 | 68 | 61 | 61 | 50 | 49 | 34 | 33 | |
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