Method Of And Device For Inspecting Images To Detect Defects

Abstract

The Present Invention Relates To A Method For Automated Defect Detection In Textured Materials. The Present Invention Utilizes Linear Finite Impulse Response (Fir) Filters With Optimized Energy Separation. Specifically, The Invention Provides A Method Of Inspecting Industrial Products For Defects. The Method Has Steps Of: Automated Design Of Optimized Filters From Samples Of Products, Using These Optimal Filters To Filter The Acquired Images Of Product Under Inspection, Computing The Energy Of Each Pixel In A Local Region, And Finally Segmenting The Defect By Thresholding Each Pixel. The Present Invention Also Relates To A Method Of Inspection Of Unknown (Unsupervised) Defects In Web Materials. In An Unsupervised Inspection, Information From A Finite Number Of Optimal Filters Is Combined Using A Data Fusion Module.; This Module Attempts To Nullify The False Alarm Associated With The Information Arriving From Different Channels.