METHOD AND APPARATUS FOR SCANNING WITH CONTROLLED SPHERICAL ABERRATION

摘要

A reader obtains image data corresponding to an image of optically encoded information that is received via a lens unit that causes controlled spherical aberration blurring that is precisely known. The reader may perform deconvolution processing on the image data to render it decodable. The deconvolution processing may implement a Weiner filter that uses data corresponding to a near-field point spread function of the lens unit. The depth of field of the reader is greater than that of conventional reader in all lighting conditions.

主权项

1. A method of decoding optically encoded information performed by an image processing system, the method comprising:
obtaining first image data corresponding to an image of optically encoded information received via a lens unit that causes controlled spherical aberration; performing first processing on the first image data; responsive to the first processing on the first image data not producing data corresponding to the optically encoded information, obtaining second image data by performing second processing on the first image data and performing the first processing on the second image data; and responsive to the first processing on the second image data not producing the data corresponding to the optically encoded information, obtaining third image data by performing third processing on the first image data and performing the first processing on the third image data; wherein the lens unit causes predetermined spherical aberration blurring in the image of the optically encoded information.