Cognex robust modular In-Sight 7800 series machine vision systems tackle this application using multiple tools (histograms, edges, etc.) complemented by externally mounted linear lights above mouthpieces. In-Sight 7800 detects contrast disparities between mouthpiece and filter paper, validating presence and proper placement. Edged tools scrutinize recessed mouthpiece tail ends for incisions, segregating rejects from fast-paced production lines. Efficient installation follows suit, accompanied by simple configuration enabled via In-Sight Resource Manager software. Network-enabled Human-Machine Interfaces monitor test outcomes remotely.