05294783 is referenced by 218 patents and cites 9 patents.

A bar code detection circuit accepts as input the discretized analog output of a CCD array, and performs piecewise linear reconstruction to produces a continuous polylinear output signal. In the region of a bar/space transition, the output signal is a close approximation of the reflectance function of a bar code symbol convolved with the system transfer function of the bar code reader. Linear interpolation is performed in order to determine the offset of a given threshold value from an edge of the CCD analog output.

Title
Analog reconstruction circuit and bar code reading apparatus employing same
Application Number
7/819448
Publication Number
5294783
Application Date
January 10, 1992
Publication Date
March 15, 1994
Inventor
William H Havens
Skaneateles
NY, US
Andrew Longacre Jr
Skaneateles
NY, US
Charles M Hammond Jr
Skaneateles
NY, US
Agent
Harris Beach & Wilcox
Assignee
Welch Allyn
NY, US
IPC
G06K 7/10
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