Registers – Coded record sensors – Particular sensor structure
Patent
1998-12-04
2000-08-15
Pitts, Harold I.
Registers
Coded record sensors
Particular sensor structure
23546225, G06K 710
Patent
active
061022926
ABSTRACT:
A method of compensating the edge positions of a signal generated by scanning elements of a bar code, the method including the steps of lighting the code and determining the light diffused by the code to generate in response a signal having a substantially alternating waveform defined by a sequence of high-amplitude portions separated by and joined to low-amplitude portions by steeply sloping edges of the waveform. A number of local minimum and maximum points of the waveform are determined to determine coordinates defining approximate edge positions. The coordinates are then corrected to generate modified coordinates, each relative to a corrected position of the edge compensating for any shift in the edge induced by blurring of the signal.
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EPO Search Report May 29, 1998.
"Using Multiple Thresholding Method To Read Barcodes" IBM Technical Disclosure Bulletin, vol. 36, No. 6B, Jun. 1, 1993, pp. 539-540 XP 000377476.
Bottazzi Marco
Caselli Francesco
Saporetti Claudio
Zocca Rinaldo
Datalogic S.p.A.
Pitts Harold I.
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