METHOD AND SYSTEM FOR INSPECTING A LOW GLOSS SURFACE OF AN OBJECT AT A VISION STATION

摘要

A method and system are provided for inspecting a low gloss surface (12) of an object (14) at a vision station utilizing a regular, extended pattern of infrared radiation. The system includes an infrared radiation source (10) and an infrared image converter and/or infrared cameras (16) to automatically locate a surface defect in the object. A signal processor processes a first set of electrical signals from the infrared cameras to obtain a second set of electrical signals which represent pattern distortions in the reflected infrared radiation signal caused by the surface defect in order to locate the surface defect in the object. The second set of electrical signals may be processed to classify the surface defect in the object as being an "in-dent" or an "out-dent".