Abstract

Error diffusion is well-known adaptive quantization technique used in halftoning for quantizing data from a larger to a smaller number of gray levels. A method for creating cell-oriented computergenerated holograms using a modified error diffusion approach is proposed. Error diffusion is also a flexible tool for incorporating constraints of the printing device into the calculation of cell-oriented CGHs. The advantage of the proposed scheme is that the printability constraints are not applied in the calculation of the complex wave amplitude, but are incorporated in the subsequent quantization step for the CGH. The robustness of the quantization process has been investigated for varying aperture sizes, quantization conditions, and printer characteristics. The ability of error diffusion to reconstruct objects without adding a random phase and using a form of nonuniform quantization is also discussed.

Library of Congress Subject Headings

Holography--Data processing; Optical data processing--Mathematics; Fourier transform optics; Fourier transformations

Publication Date

8-1-1995

Document Type

Thesis

Department, Program, or Center

Chester F. Carlson Center for Imaging Science (COS)

Advisor

Easton, Roger

Comments

Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: TA1542 .N263 1995

Campus

RIT – Main Campus

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