Error Reduction In Two-Dimensional Pulse-Area Modulation, With Application To Computer-Generated Transparencies

Martin J. Bastiaans

doi:10.1117/12.967290

1 January 1987 Error Reduction In Two-Dimensional Pulse-Area Modulation, With Application To Computer-Generated Transparencies

Martin J. Bastiaans

Author Affiliations +

Proceedings Volume 0813, Optics and the Information Age; (1987) https://doi.org/10.1117/12.967290
Event: 14th Congress of the International Commission for Optics, 1987, Quebec, Canada

Abstract

The paper deals with the analysis of computer-generated half-tone transparencies that are realised as a regular array of area-modulated unit-height pulses and with the help of which we want to generate [via low-pass filtering] band-limited space functions by optical means. The mathematical basis for such transparencies is, of course, the well-known sampling theorem [1], which says that a band-limited func-tion y(x), say, [with x a two-dimensional spatial column vector] can be generated by properly low-pass filtering a regular array of Dirac functions whose weights are proportional to the required sample values yey(Xm) [with X the sampling matrix and m=(mi,m2)t an integer-valued column vector; the superscript t denotes transposition].

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Martin J. Bastiaans "Error Reduction In Two-Dimensional Pulse-Area Modulation, With Application To Computer-Generated Transparencies", Proc. SPIE 0813, Optics and the Information Age, (1 January 1987); https://doi.org/10.1117/12.967290

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