Cognex has developed the PowerGrid technology, a texture-based location algorithm that takes an inside-out approach to reading 2D matrix and Direct Part Mark (DPM) codes. While conventional feature-based algorithms start by locating the finder pattern, the technology looks for a pattern of alternating light and dark modules within the code.
According to the developer, the technology allows increase in read rates in 2D barcode-reading applications where a part’s geometry, poor lighting, occlusion, or print-registration errors make it difficult to capture an image of the entire code.
The technology is now available on the X models of the DataMan 300 series fixed-mount barcode readers.
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