- poppler に含まれる pdfimage を使う
- poppler のインストールは cygwin なら poppler を選ぶだけ
$ pdfimages -list pdfile.pdf page num type width height color comp bpc enc interp object ID x-ppi y-ppi size ratio -------------------------------------------------------------------------------------------- 1 0 image 1787 2481 rgb 3 8 jpeg no 4 0 300 300 326K 2.5% 2 1 image 1787 2481 rgb 3 8 jpeg no 15 0 300 300 125K 1.0% 3 2 image 1682 2484 rgb 3 8 jpeg no 19 0 300 300 167K 1.4% 4 3 image 1682 2484 rgb 3 8 jpeg no 26 0 300 300 117K 1.0% 5 4 image 1674 2483 gray 1 8 jpeg no 2536 0 300 300 389K 9.6% 6 5 image 1674 2483 gray 1 8 jpeg no 2539 0 300 300 860K 21% 7 6 image 1673 2482 gray 1 8 jpeg no 2511 0 300 300 216K 5.3% 8 7 image 1673 2482 gray 1 8 jpeg no 2516 0 300 300 184K 4.5% 9 8 image 1674 2481 gray 1 8 jpeg no 2521 0 300 300 213K 5.3% 10 9 image 1674 2481 gray 1 8 jpeg no 2526 0 300 300 227K 5.6%
