Process and apparatus for reading contrasting indicia

Details Process and apparatus for reading contrasting indicia Process and apparatus for reading contrasting indicia

G - Physics

06

K

354/55

G06K 9/60 (2006.01) G06K 7/10 (2006.01) G06K 9/20 (2006.01) G06K 9/72 (2006.01)

Patent

CA 1198218

- 1 - Abstract An apparatus and process is provided for reading contrasting indicia provided in one or more data fields in at least one data track and arranged in indicia groups containing, if necessary, format controlling symbols which indicate the partial format of each following indicia group. The data field(s) are optically scanned and con- verted to a corresponding video signal, which is decoded. The indicia and format controlling symbols thus read are then translated serially into standard code binary indicia- or format controlling symbol-signals and then displayed, printed out or processed further. In order to display or process further the data field(s) thus read only if certain predetermined context requirements contained in the data field(s) are fulfilled, at least one context requirement is provided which indicates an in- terrelation between several partial formats. A review is made as to whether the interrelation between the partial formats thus read is as required by the context condition. If the required context condition is found, further pro- cessing or display of the binary signals from the decoder takes place. On the other hand, if the required context conditions are not fulfilled, an error signal is produced which either triggers a new reading process or displays an error.

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