The basic idea: the use of open-source library achieve solutions to jpeg compression quantization tables extracted directly calculating quality factor, according to the standard quantization table and extracted quantization table to write algorithms.

jpeg\jpeg-6b\cjpeg
....\.......\configure
....\.....8d\configure
....\.......\depcomp
....\.....6b\djpeg
....\.......\install-sh
....\.....8d\install-sh
....\.....6b\jpegtran
....\.....8d\libtool
....\.....6b\libtool
....\.......\ltconfig
....\.....8d\Makefile
....\.....6b\Makefile
....\makefile
....\jpeg-8d\missing
....\.....6b\README
....\.....8d\README
....\.......\stamp-h1
....\jpegsrc.v6b.tar.gz
....\jpegsrc.v8d.tar.gz
....\....-6b\.libs\libjpeg.la
....\.......\libjpeg.la
....\shlib\lib\libjpeg.la
....\lib\libjpeg.la
....\test.jpg
....\jpeg-6b\testimg.jpg
....\.....8d\testimg.jpg
....\.....6b\testimgp.jpg
....\.....8d\testimgp.jpg
....\.....6b\testorig.jpg
....\.....8d\testorig.jpg
....\.....6b\testprog.jpg
....\.....8d\testprog.jpg
....\.....6b\testimg.bmp
....\.....8d\testimg.bmp
....\.....6b\cderror.h
....\.....8d\cderror.h
....\.....6b\cdjpeg.h
....\.....8d\cdjpeg.h
....\.....6b\jchuff.h
....\.....8d\jconfig.h
....\.....6b\jconfig.h
....\shlib\include\jconfig.h
....\jconfig.h
....\.peg-6b\jdct.h
....\.....8d\jdct.h
....\.....6b\jdhuff.h
....\.......\jerror.h
....\.....8d\jerror.h
....\shlib\include\jerror.h
....\jerror.h
....\.peg-8d\jinclude.h
....\.....6b\jinclude.h
....\.....8d\jmemsys.h
....\.....6b\jmemsys.h
....\.......\jmorecfg.h
....\.....8d\jmorecfg.h
....\shlib\include\jmorecfg.h
....\jmorecfg.h
....\.peg-6b\jpegint.h
....\.....8d\jpegint.h
....\.....6b\jpeglib.h
....\.....8d\jpeglib.h
....\shlib\include\jpeglib.h
....\jpeglib.h
....\....-6b\jversion.h
....\.....8d\jversion.h
....\.....6b\transupp.h
....\.....8d\transupp.h
....\.....6b\ansi2knr.c
....\.....8d\ansi2knr.c
....\.......\cdjpeg.c
....\.....6b\cdjpeg.c
....\.......\cjpeg.c
....\.....8d\cjpeg.c
....\.....6b\ckconfig.c
....\.....8d\ckconfig.c
....\.....6b\djpeg.c
....\.....8d\djpeg.c
....\.....6b\example.c
....\.....8d\example.c
....\.......\jaricom.c
....\.....6b\jcapimin.c
....\.....8d\jcapimin.c
....\.......\jcapistd.c
....\.....6b\jcapistd.c
....\.....8d\jcarith.c
....\.....6b\jccoefct.c
....\.....8d\jccoefct.c
....\.....6b\jccolor.c
....\.....8d\jccolor.c
....\.....6b\jcdctmgr.c
....\.....8d\jcdctmgr.c
....\.....6b\jchuff.c
....\.....8d\jchuff.c
....\.....6b\jcinit.c
....\.....8d\jcinit.c
....\.....6b\jcmainct.c
....\.....8d\jcmainct.c
....\.....6b\jcmarker.c

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