Message-Id: <199801261558.IAA22992@dns.ccit.arizona.edu> Date: Mon, 26 Jan 1998 08:50:48 -0700 From: Andy Bartlett <mailto:andy@NORSAM.COM> Subject: grayscale to halftone conversion To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU
I am working for a company, Norsam Technologies, that is developing a new product to archive analog (i.e. eye-readable) data onto metal substrates, as a way to improve density and longevity over conventional microfilm storage techniques.We have many technological options for writing the data, but right now the easiest and most reliable way to write data is in black and white, as opposed to grayscales. Currently, that limits us to text, but I would like to do some experiments writing photographs as half-tones. I'd like to know if anybody has suggestions as to how I can accurately convert a grayscale photograph to halftone. For example, I tried changing the attributes in the Paint program to black and white, but got very unsatisfactory results. Is there a program that does this conversion, with user options? How do, for example, newspapers do this conversion?
Thanks for you help, Andy Bartlett mailto:andy@norsam.com www.norsam.com