Three Period Codes and Character Visual Inspection System

The production date, batch number, and expiration date (commonly known as “Three Period Codes”) on pharmaceutical packaging are the “identity credentials” of drugs, directly related to medication safety. Once issues such as missing characters, blurred printing, or misprinted characters occur, it will not only cause consumers to misuse expired drugs but also expose enterprises to compliance penalties and brand crises. However, manual inspection relies on visual observation, which is not only inefficient but also prone to fatigue and missed inspections. Faced with challenges such as inconsistent embossing depth, packaging reflections, and wrinkles, it is even more difficult to distinguish authenticity. CKVision’s solution precisely addresses these pain points: For embossed characters with no obvious color difference, the self-developed image preprocessing algorithm enhances the edge contrast of characters, ensuring that even faintly printed or blurred characters are clearly displayed; To tackle interference from packaging reflections and wrinkles, a customized hardware configuration combined with flexible adaptation is adopted, closely aligning with the actual needs of pharmaceutical enterprises. This effectively eliminates the impact of light spots and shadows, enabling rapid adaptation and safeguarding drug safety through technological strength.