Patent attributes
The present disclosure relates to advanced image signal processing technology including: i) rapid localization for machine-readable indicia including, e.g., 1-D and 2-D barcodes; and ii) barcode reading and decoders. One claim recites: a method for constructing a symbol template for use by a 1-dimensional (1D) barcode decoder, the barcode decoder configured for processing image data suspected of including a 1D barcode, said method comprising: obtaining a first symbol pattern representing a first symbol, the first symbol pattern comprising a plurality of elements, with each element corresponding to a 1D barcode space or bar; obtaining prefix elements, the prefix elements comprising a subset of second symbol elements from a second symbol pattern which precedes the first symbol from within a scanline of image data; extending the first symbol pattern with the prefix to yield an overlapping symbol template; and providing the overlapping symbol template for use in correlation-based barcode decoding by the 1D barcode decoder. Of course other combinations and claims are provided too.
