Chapman and Kenney, Digital Conversion of Research Library Materials, D-Lib Magazine (October 1996)

300 dpi 1-bit capture (selected details from full page)

Visual assessments - 1.1 mm text: pronounced jaggies; filled in "i" - 0.9 mm text: edges rough, letter "e" incomplete - broken type represented, but edges not smooth and distinct 300 dpi 1-bit does not meet criteria for full-informational capture note: see the PostScript example below to evaluate the rendering of this text in context, and at actual size in print.

600 dpi 1-bit capture (selected details from full page)

Visual assessments - 1.1 mm text: edges smooth, "i" rendered as in original - 0.9 mm text: character details captured with fidelity; "e" is complete, and "s" is broken as in original - representation faithful to original 600 dpi 1-bit satisfies criteria for full-informational capture note: see the PostScript example below to evaluate the rendering of this text in context, and at actual size in print.

source: Andrew Boss, Farm Management, Chicago, New York: Lyons & Carnahan, 1914, p. 220.

Postscript version: EXAMPLE1.PS, [1,243 Kb]

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