Patent ID: 6012639
Filing Date: 2000-01-11
Classification: G06K

Abstract:
In a barcode scanner system, a method of determining relative bar and space widths in a scanned input signal comprising the steps of:identifying a first dark-to-light transition in the input signal;storing a value representing said identified first dark-to-light transition;consecutively identifying at least one light-to-dark transition in the input signal;consecutively storing a value representing each said consecutively identified light-to-dark transition;identifying a second dark-to-light transition in the input signal;storing a value representing said identified second dark-to-light transition; and,determining relative space and bar widths in the input signal by comparing said stored value representing said identified second dark-to-light transition with the last said consecutively stored value to determine the previous bar width and comparing the last said consecutively stored value with said stored value representing said identified first dark-to-light transition to determine the previous space width.