Research on Online Visual Inspection System for Multi-Feature Trademark Defect

Modern printing industry detective techniques, which have transferred from traditional single discrete manual operation into line detection based on machine vision. The line detection research under the highly automated process requirements, which is based on color graphics, gravure text, high-speed stamping and laser hologram hot stamping technology, is the multi-feature defect detection and recognition. By CDD study linear measurement techniques and computer vision technology, the research built the visual inspection platform, and design detection scheme combined with the specific requirements of the printing process in database technology and image processing technology. Research obtained the online testing solutions and system information flow characteristics, which achieved requirement of multi-feature detection, high precision and high speed continuous production technologies.