Jpeg2000 のバックアップ(No.17)

Jpeg2000[edit]

v1系

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File Format[edit]

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Code Stream[edit]

http://hp.vector.co.jp/authors/VA027608/jpeg2000/

[MakerName] [MakerLength] [MakerData]
- MakerName: 2Byte, 1Byte目は 0xff
- MakerLength: 2Byte, Big Endian, [MakrtLenght] + [MakerData] の長さ．
- MakerData: 実際のデータ

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Maker[edit]

Start of codestream                      SOC    0xff4f    コードストリームの始まり．MakerLength なし．
Image and tile size                      SIZ    0xff51    画像サイズ、タイルサイズ情報
Coding style default                     COD    0xff52 
Coding style component                   COC    0xff53 
Tile-part lengths, main header           TLM    0xff55 
Packet length, main header               PLM    0xff57 
Packet length, tile-part header          PLT    0xff58 
Quantization default                     QCD    0xff5C 
Quantization component                   QCC    0xff5D 
Region-of-interest                       RGN    0xff5E 
Progression order default                POD    0xff5F 
Packed packet headers, main header       PPM    0xff60 
Packed packet headers, tile-part header  PPT    0xff61 
Comment and extension                    CME    0xff64    コメント
Start of tile-part                       SOT    0xff90    タイルパートの始まり
Start of packet                          SOP    0xff91 
End of packet header                     EPH    0xff92 
Start of data                            SOD    0xff93    データの始まり．MakerLength なし？．
End of codestream                        EOC    0xffd9    コードストリームの終わり．MakerLength なし．

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Sample[edit]

ff 4f                                             Start of codestream 

ff 51 00 2f                                       Image and tile size 
00 00 
00 00 02 00  512
00 00 02 00  512
00 00 00 00 
00 00 00 00 
00 00 02 00  512
00 00 02 00  512
00 00 00 00 00 00 00 00 00 03 07 01 01 07 01 01 07 01 01

ff 52 00 0c                                       Coding style default 
00 00 00 05 01 05 04 04 00 00

ff 5c 00 23                                       Quantization default 
22 77 1e 77 00 77 00 76 e2 6f 00 6f 00 6e e2 67
4c 67 4c 67 64 50 03 50 03 50 45 57 d2 57 d2 57
61

ff 64 00 11                                       Comment and extension 
00 01 4b 61 6b 61 64 75 2d 76 34 2e 32 2e 31

ff 90 00 0a                                       Start of tile-part 
00 00 00 01 7e ba 00 01

ff 93                                             Start of data 
cf 83 4a 10 cc d8 e7 32 3d                        以下 97964 Byte = 0x0173ac Byte  
fa 59 c5 2f 5c 02 e3 b9 6d b1 5e 14 0e 82 19 34   
d0 d1 e3 db be f6 fc 80 87 7d f6 d1 e1 28 06 e6 
d4 88 a3 f7 f5 a3 e2 08 a7 d9 a2 f6 b7 fd 16 e8 
ca 18 2c 03 be 76 a8 75 82 1d c8 c9 58 e6 a7 a8 
42 d5 68 74 c3 9a 30 06 c1 5c 3d 49 22 27 b9 98 
...............................................   x 6117行
ce 80 80

ff d9                                             End of codestream