Message-Id: <mailto:199506062048.NAA50490@listserv.ccit.arizona.edu> Date: Tue, 6 Jun 1995 16:43:26 -0500 From: "Peter J. Roberts" <mailto:LIBPJR@LANGATE.GSU.EDU> Subject: Scanning B&W photonegatives ? To: Multiple recipients of list IMAGELIB
Please let me know if you believe the following information is accurate. The highest optical scanning resolution for the HP LaserJet IIcx is 400 dpi. Scanning a black & white 4X5 negative at 400 dpi yields about a 2,601K tiff image. With no compression and scanning at 400 dpi you can store about 393 images per gigabyte. An acceptable viewing resolution is achieved by scanning at 150 dpi. Scanning a black & white 4X5 negative at 150 dpi yields about a 371K tiff image. Scanning at 150 dpi and no compression you can store about 2,760 images per gigabyte. Scanning at 150 dpi and 8 to 1 JPEG compression yields about a 154K JPEG image. With 8 to 1 JPEG compresssion you can store about 6,649 images per gigabyte 1,024K ñ Megabyte (Meg) 1,000 Megs ñ gigabyte With 8 to 1 JPEG compression there is no perceivable image degradation. A one gigabyte SCSI hard drive costs about $490.00 A nine gigabyte SCSI hard drive costs about $3215.00 Sincerely Peter J. Roberts Georgia State University mailto:libpjr@langate.gsu.edu