PDF表格識別

參考文章：html

http://www.dlib.org/dlib/november14/klampfl/11klampfl.html
htm

http://www.tamirhassan.com/competition.html
it

http://www.tamirhassan.com/pdfxtk.html
io

http://ieg.ifs.tuwien.ac.at/projects/pdf2table/
table