The performance of a printer or an imaging system using transfor

Details The performance of a printer or an imaging system using transfor The performance of a printer or an imaging system using transfor

1995-05-26

1996-10-15

Boudreau, Leo

Image analysis

Applications

Document or print quality inspection

382141, 382280, G06K 900

Patent

active

055662455

ABSTRACT:
A method and apparatus for characterizing the performance of either a printer used to print a two-dimensional symbol or an imaging system used to generate an gray-scale image of the printed symbol. After the image is generated, an acquisition target of the symbol is located. The fast Fourier transform of the gray-scale image is generated and certain hexagon-position quality measures are computed to characterize the quality of the acquisition target.

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Ehrhardt, "Hexagonal Fast Fourier Transform with Rectangular Output", IEEE Transactions on Signal Processing; Mar. 1993, vol. 41, No. 3.
Patent Abstracts of Japan, vol. 14 No. 231 (M-0974), 16 May 1990 & JP,A,02 060785 (Omron Tateisi Electron Co.) 1 Mar. 1990.

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