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jpeg の変更点
* format [#ba8de689] | |MARKER(2)| | | | | | |SOI |FFD8(2) | | | | | | |COM | |FFFE(2) |13,size(2)|comment(11)| | | |APP0| |FFE0(2) |16,size(2)|JFIF(4)|(4) |x(1),y(1),(6)| |APP1| |FFE1(2) |48,size(2)|Exif(4)|0000(2)|exifdata(40)| |APPn| |FFEn(2) | | | | | |APPD| |FFED(2) | | | | | |DQT | |FFDB(2) |67,size(2)| (1)| (64)| | |DHT | |FFC4(2) |31,size(2)| (29)| | | |SOF0| |FFC0(2) |17,size(2)| (3)|height(2),width(2)|(8) | |SOS | |FFDA(2) |12,segment(2)|3,(1)0100,0211,0311(6)|003F00(3)|| | | |hufman(8)||||| |EOI |FFD9(2) | | | | | | * EXIF [#o39417ca] |JPEGHeader|FFE1(2)|48,size(2)|payload(46) |備考| |EXIFHeader| | |457869660000(6) || |----------|-------| |↓ここからカウント || |TIFFHeader| | |49492A00(4) |4949 はlittle endian | |offset | | |08000000(4) |8固定| |内容の数 | | |0200(2) |N=2| |----------|-------| | |ここから12バイトがN回| ||タグ | |9B9C(2) || ||数値タイプ| |0100(2) || ||数 | |04000000(4) |payloadサイズが計算できる| ||offset/payload| |1A000000(4) |上記のサイズが4バイト以下の場合はここにpayload| ||offset/payload| |1A000000(4) |4バイト以下の場合はここにpayload| |----------|-------| | || ||タグ | |9B9C(2) || ||数値タイプ| |0100(2) || ||数 | |04000000(4) || ||offset/payload| |1A000000(4) || |----------|-------| | || * info [#ubbdf875] -しいしせねっと http://siisise.net/jpeg.html - exif http://park2.wakwak.com/~tsuruzoh/Computer/Digicams/exif.html#ExifMarker * tool [#v0eb4e41] &attachref(jpeg_title.pm); &attachref(make_thumb.pl); |
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