Abstract
A ternary barcode detection system employing a dual-threshold detection method is proposed to increase detection speed and detection range. This system, providing adaptability to any ternary barcode pattern through the attenuation of an enveloped line of a detected barcode signal and subtraction from the original barcode signal, enables detection over a longer range and also at higher scanning speeds while remaining compact and containing a great amount of information. The system was tested and confirmed to operate at a maximum scanning speed of seven times that of conventional CCD cameras under the practical detection range. It is estimated that a combination of ternary barcodes consisting of nine elements per character will enable the system to express at least 640 characters, over 14 times more than the conventional binary barcode Code39. This system is expected to enable the real-time identification of goods in automated warehouses and production lines.
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