Omnidirectional scanning method and apparatus

Details Omnidirectional scanning method and apparatus Omnidirectional scanning method and apparatus

1995-08-25

1997-06-03

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

382299, G06K 710

Patent

active

056356994

ABSTRACT:
A method and apparatus for reading encoded symbols such as bar code labels at any orientation to a raster scanning device. A pattern of virtual scan lines is selected over the two-dimensional imaging region according to the specifications of the images to be read. The pattern is generated by defining a family of parallel lines of a certain spacing and rotating the family by a specified angle until the two-dimensional imaging region is covered. Only the data at selected raster locations on the virtual scan lines is stored and processed. One-dimensional signal processing methods are used to detect edges and decode the encoded symbols.

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Ronald E. Cochiere and Lawrence R. Rabiner, Multirate Digital Signal Processing(Prentice-Hall 1983), pp. 20-29.

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