R,C. Gonzalez and R.E. Woods, Digital Image Processing , Addison-Wesley 1993.
A.K. Jain, Fundamentals of Digital Image Processing, Prentice Hall 1989.
I.H. Witten, A. Moffat, T. Bell, Managing Gigabytes , VanNostrand, 1994
H.S. Hou, Digital Document Processing , Wiley 1983
H.S. Baird, H. Bunke, K. Yamamoto, Structured Document Image Analysis , Springer 1992
A.L. Spitz and A. Dengel, Document Analysis Systems , Word Scientific 1995
J.J. Hull and S. Leibowitz Taylor, Document Analysis Systems , LMS, 1996