Vision company revs up 2D barcode reading

Cognex Corporation (cognex.com), the world's leader in machine vision, announces its PowerGrid™ technology, a texture-based location algorithm that takes a unique, inside-out approach to reading 2-D matrix and Direct Part Mark (DPM) codes. 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.

PowerGrid technology dramatically increases read rates in 2-D 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. Unlike previous solutions, PowerGrid technology can locate and read codes even when they exhibit significant damage to or complete elimination of the finder pattern, clocking pattern, or quiet zone.