An automatic procedure to identify the areas of interest for the automated inspection of headlamp lenses

Many machine vision applications require manipulation of the acquired image to prepare it for processing. One type of pre-processing operation consists in identifying the areas of interest-or regions of interest (ROIs)-for the image analysis. But in occasions, the image areas to be analyzed may vary from one part to another. This is the case of the automated inspection of headlamp lenses that, due to the part positioning mechanism, the image areas to be processed do not always stand in the same image site. This paper presents an automatic procedure to adjust the region of interest in the images acquired for the inspection of a commercial model of headlamp lens. This proposal is included in a machine vision prototype for the automated inspection of such lenses. The results herein presented are achieved with this prototype.