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Guidelines for Electronic Preservation of Visual Materials

Image Files

The table below lists the .TIF files created by the various scanning experiments described in the this document. In addition to the file name and size, a description is provided of the scanning methods used when creating the file.

Viewers can download a specific file by clicking on the file name in the table. To save time in downloading all the files, users may wish to initiate an anonymous ftp session at: ftp://ftp.loc.gov/pub/preservation/guidelines/images

File Name Size Sample Notes
bio01l.tif ??K text &
engraving
original, 600 dpi, 8-bit grayscale (not available)
bio1.tif 1290K engraving original, 600 dpi, 8-git grayscale. Approximately 4 times actual size.
bio1_300.tif 647K engraving scaled to 300 dpi, first resampling method, 8-bit grayscale
bio1a3a.tif 323K engraving scaled to 300 dpi, nearest neighbor method, 8-bit grayscale
bio1a3b.tif 323K engraving scaled to 300 dpi, averaging method, 8-bit grayscale
bio1a3c.tif 323K engraving scaled to 300 dpi, second resampling method, 8-bit grayscale
bio1_200.tif 184K engraving scaled to 200 dpi, first resampling method, 8-bit grayscale
bio1a2a.tif 143K engraving scaled to 200 dpi, nearest neighbor method, 8-bit grayscale
bio1a2b.tif 143K engraving scaled to 200 dpi, averaging method, 8-bit rayscale
bio1a2c.tif 143K engraving scaled to 200 dpi, second resampling method, 8-bit grayscale
bio1_150.tif 81K engraving scaled to 150 dpi, first resampling method, 8-bit grayscale
bio1a15a.tif 81K engraving scaled to 150 dpi, nearest neighbor method, 8-bit grayscale
bio1a15b.tif 81K engraving scaled to 150 dpi, averaging method, 8-bit grayscale
bio1a15c.tif 81K engraving scaled to 150 dpi, second resampling method, 8-bit grayscale
b io2.tif 1813K text scaled to 600 dpi, 8-bit grayscale. Approximately 4 times actual size.
b1_6b.tif 161K engraving original, 600 dpi, binarized
b1_12b.tif 645K engraving scaled to 1200 dpi then binarized
b2_6b.tif 226K text original, 600 dpi, binarized
b2_3b.tif 57K text scaled to 300 dpi the binarized. Approximalely actual size.
c rd3.tif 140K card bibliographic card, original 600 dpi, 8-bit grayscale
crd3_3j.tif 73K card bibliographic card, scaled to 300 dpi, 8-bit grayscale, JPEG compressed
crd3_6b.tif 70K card bibliographic card, 600 dpi, binarized
crd3_3b.tif 17K card bibliographic card, scaled to 300 dpi, then binarized. Also has less-sensitive threshold setting resulting in dropout of low contrast.
m rt1.tif 347K manuscript originial, 600 dpi, 8-bit grayscale. Note variable contrast due to typewriter ribbon. Approximately 2 times actual size.
mrt1_3j.tif 129K manuscript scaled to 300 dpi, 8-bit grayscale, JPEG compressed
mrt1_6s.tif 174K manuscript 300 dpi, JPEG compressed, then scaled to 600 dpi, then binarized with a sensitive threshold
mrt1_3b.tif 43K manuscript 300 dpi, binarized with a nomal sensitivity threshold.
v rs1.tif 279K carbon carbon copy, original 600 dpi, 8-bit grayscale. Approximately actual size.
vrs1_3j.tif 153K carbon carbon copy, 300 dpi, JPEG compressed
vrs1_6s.tif 140K carbon carbon copy, 300 dpi, JPEG compressed, scaled to 600 dpi, then binarized with a sensitive threshold setting.

Table of Contents - Executive Summary - Introduction - Aspects of Collection Analysis - Guidelines - Scanning & Compression - Appendixes

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