jpeg图像编码

A 10 B 11 C 12 D 13 E 14 F 15 E1 225 – EF 239 255，216 FFD8 图像的开始 255，224 FFE0 JFIF应用数据块 255，219 FFDB 量化表 255，192 FFC0 帧开始 255，196 FFC4 霍夫曼表 255，218 FFDA 扫描线开始 255，217 FFD9 图像结束 将exe文件的所有byte写入到jpeg的数据区域 94 x 21 FFE0应用数据 0,16,74,70,73,70,0,1,1,1,0,96,0,96,0,0 1，第（1-2）字节表示应用数据块的长度 0,16 表示FFE0后面的共有16个字节的数据 2，第（3-7）字节表示标识符，0x4A46494600对应74,70,73,70,0 3，第（8-9）字节表示版本号，0x0102表示1.2版本，该图像是0x0101表示1.1版本 4，第10字节表示密度单位，只有0（无单位），1（点数/英寸），2（点数/厘米）三个值， 5，第（11-12）字节表示x方向像素的密度，0，96,表示96DPI 6，第（13-14）字节表示Y方向像素的密度，0，96，表示96DPI 7，第15字节表示缩略图水平像素数目 8，第16字节表示缩略图垂直像素数目 FFDB量化表 255,216,255,224,0,16,74,70,73,70, 0,1,1,1,0,96,0,96,0,0, 255,219,0,67,0,3,2,2,3,2, 2,3,3,3,3,4,3,3,4,5, 8,5,5,4,4,5,10,7,7,6, 8,12,10,12,12,11,10,11,11,13, 14,18,16,13,14,17,14,11,11,16, 22,16,17,19,20,21,21,21,12,15, 23,24,22,20,24,18,20,21,20,255, 219,0,67,1,3,4,4,5,4,5, 9,5,5,9,20,13,11,13,20,20, 20,20,20,20,20,20,20,20,20,20, 20,20,20,20,20,20,20,20,20,20, 20,20,20,20,20,20,20,20,20,20, 20,20,20,20,20,20,20,20,20,20, 20,20,20,20,20,20,20,20,255,192, 0,17,8,0,21,0,94,3,1,34, 0,2,17,1,3,17,1,255,196,0, 31,0,0,1,5,1,1,1,1,1, 1,0,0,0,0,0,0,0,0,1, 2,3,4,5,6,7,8,9,10,11, 255,196,0,181,16,0,2,1,3,3, 2,4,3,5,5,4,4,0,0,1, 125,1,2,3,0,4,17,5,18,33, 49,65,6,19,81,97,7,34,113,20, 50,129,145,161,8,35,66,177,193,21, 82,209,240,36,51,98,114,130,9,10, 22,23,24,25,26,37,38,39,40,41, 42,52,53,54,55,56,57,58,67,68, 69,70,71,72,73,74,83,84,85,86, 87,88,89,90,99,100,101,102,103,104, 105,106,115,116,117,118,119,120,121,122, 131,132,133,134,135,136,137,138,146,147, 148,149,150,151,152,153,154,162,163,164, 165,166,167,168,169,170,178,179,180,181, 182,183,184,185,186,194,195,196,197,198, 199,200,201,202,210,211,212,213,214,215, 216,217,218,225,226,227,228,229,230,231, 232,233,234,241,242,243,244,245,246,247, 248,249,250,255,196,0,31,1,0,3, 1,1,1,1,1,1,1,1,1,0, 0,0,0,0,0,1,2,3,4,5, 6,7,8,9,10,11,255,196,0,181, 17,0,2,1,2,4,4,3,4,7, 5,4,4,0,1,2,119,0,1,2, 3,17,4,5,33,49,6,18,65,81, 7,97,113,19,34,50,129,8,20,66, 145,161,177,193,9,35,51,82,240,21, 98,114,209,10,22,36,52,225,37,241, 23,24,25,26,38,39,40,41,42,53, 54,55,56,57,58,67,68,69,70,71, 72,73,74,83,84,85,86,87,88,89, 90,99,100,101,102,103,104,105,106,115, 116,117,118,119,120,121,122,130,131,132, 133,134,135,136,137,138,146,147,148,149, 150,151,152,153,154,162,163,164,165,166, 167,168,169,170,178,179,180,181,182,183, 184,185,186,194,195,196,197,198,199,200, 201,202,210,211,212,213,214,215,216,217, 218,226,227,228,229,230,231,232,233,234, 242,243,244,245,246,247,248,249,250,255, 218,0,12,3,1,0,2,17,3,17, 0,63,0,253,83,162,138,40,0,162, 加粗黑色表示图像的数据部分 138,40,3,230,61,47,94,213,116,63, 129,30,6,58,86,173,226,29,37,228, 71,18,191,135,60,54,117,153,217,119, 49,193,93,142,177,251,51,3,146,122, 87,174,124,22,191,213,47,188,34,242, 107,23,222,36,212,47,13,211,143,55, 197,26,117,181,141,200,92,46,21,98, 129,17,124,191,66,114,196,150,231,24, 3,134,248,109,226,29,99,195,191,3, 124,41,113,162,120,106,231,197,87,142, 158,89,179,181,186,130,216,162,147,33, 243,25,166,117,27,65,0,16,50,223, 54,64,56,53,145,173,126,209,190,40, 209,81,141,238,149,240,227,195,49,140, 230,79,19,252,68,75,102,143,174,9, 72,236,228,7,161,56,222,56,29,71, 56,234,197,127,30,167,171,252,204,96, 244,62,144,174,31,92,255,0,146,193, 225,79,251,5,234,29,255,0,219,182, 175,38,240,7,237,23,169,120,227,198, 26,62,157,111,227,175,134,58,133,189, 205,192,73,45,124,53,37,222,172,242, 174,121,84,185,66,145,161,192,56,102, 82,51,145,143,148,231,214,117,207,249, 44,30,20,255,0,176,94,161,219,253, 187,106,229,54,59,138,40,162,128,10, 40,162,128,10,40,162,128,10,40,162, 128,62,50,241,181,213,132,63,179,151, 195,235,125,75,195,62,29,241,84,19, 221,42,173,167,137,180,225,125,107,27, 237,148,44,158,81,96,9,25,61,79, 115,208,242,58,191,1,252,24,241,60, 186,109,181,254,147,169,124,60,240,157, 180,163,49,197,225,255,0,135,235,4, 177,128,216,63,59,222,58,147,242,142, 66,15,161,227,5,21,213,136,214,180, 253,95,230,114,199,225,71,168,120,111, 225,167,138,172,117,155,45,71,88,248, 175,226,109,105,45,228,18,54,150,182, 90,101,181,156,220,17,135,17,218,121, 196,114,120,18,142,222,153,59,58,209, 207,197,255,0,10,127,216,47,80,255, 0,208,237,168,162,185,77,226,119,52, 81,69,5,133,20,81,64,31,255,217, 共445 byte 1974/96