While conventional feature-based algorithms start by locating the finder pattern, Cognex’s PowerGrid technology looks for a pattern of alternating light and dark modules within the code.
The technology increases 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.
It can locate and read codes even where there is significant damage to, or complete elimination of, the finder pattern, clocking pattern, or quiet zone.
PowerGrid technology is now available on the X models of the DataMan 300 series fixed-mount barcode readers.