Message-Id: <mailto:199505042208.RAA26746@library.wustl.edu> Date: Thu, 4 May 1995 17:53:28 -0400 From: "mailto:Walter_Gilbert@UMAIL.UMD.EDU--Maryland" <WALT@UMDD.bitnet> Subject: Bits and microfilm To: Multiple recipients of list IMAGELIB
In re Tanya Brun's question about digitizing and recording on microfilm.For scanning printed materials, line drawings, etc., 400 dpi at 256-level gray scale is adequate for all but fussy purposes (where you might like to record bleeding of ink, fading, paper imperfections, etc.). Many people are happily using a lower resolution.
As for color, I would scan in 24-bit color, but again, unless you are concerned about microscopic accuracy in reproduction, 400 dpi is plenty. Note that a Kodak Photo-CD digitized image of an 8"x12" page is the equivalent of 250 dpi. ... and they make "posters" from those CD images.
My question is: With such high-quality scanning, why duplicate your information on a just slightly post Civil War technology (microfilm)? (OK, OK, maybe World War I.) Walt
Walter Gilbert, Asst. Dir. mailto:Walter_Gilbert@umail.umd.edu Computer Science Center Manager: Teaching Technologies University of Maryland at College Park 20742-2411 (301)405-6727