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* JPEGファイルの解析結果
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既知のファイル情報一覧:
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File Name = IMG_0772.JPG
File Path = C:/Users/恂/Documents/MyDoc/tym33/uploadDATA2
File Size = 3,257,105 Bytes
SGMT Size = 20,739 Bytes
Time Stamp = 2017-04-24 14:18
Used Markers = FFE1,FFE0,FFDB,FFDA,FFD9,FFD8,FFC4,FFC0,Data2,Data1
Marker に関する情報:
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Marker | Code | 先頭からの位置
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SOI(Start of Image) | FFD8 | 0 [0x0]
APP0(JFIF) | FFE0 | 2 [0x2]
APP1(Exif) | FFE1 | 20 [0x14]
APP1(Exif) | FFE1 | 17,574 [0x44A6]
DQT(Define Quantization Table)| FFDB | 20,136 [0x4EA8]
DQT(Define Quantization Table)| FFDB | 20,205 [0x4EED]
SOF0(Start Of Frame 0) | FFC0 | 20,274 [0x4F32]
DHT(Define Huffman Table) | FFC4 | 20,293 [0x4F45]
DHT(Define Huffman Table) | FFC4 | 20,326 [0x4F66]
DHT(Define Huffman Table) | FFC4 | 20,509 [0x501D]
DHT(Define Huffman Table) | FFC4 | 20,542 [0x503E]
SOS(Start Of Scan) | FFDA | 20,725 [0x50F5]
(Top Of Binary-Data) | Data1 | 20,739 [0x5103]
(End Of Binary-Data) | Data2 | 3,257,102 [0x31B30E]
EOI(End Of Image) | FFD9 | 3,257,103 [0x31B30F]
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使用例(1):画像の縦横の長さを求める
$W = 5184
$H = 3456
使用例(2):管理情報を含まないデータの実測値を求める
データの実測値 = 3,236,364 Bytes
ファイルに関する情報の最終結果:
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File Name = IMG_0772.JPG
File Path = C:/Users/恂/Documents/MyDoc/tym33/uploadDATA2
File Size = 3,257,105 Bytes
SGMT Size = 20,739 Bytes
Time Stamp = 2017-04-24 14:18
データ実測値 = 3,236,364 Bytes
横幅 = 5,184 Pixel
高さ = 3,456 Pixel
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