machine vision system design
Posted on 1997-11-05
I need to design a machine vision system to inspect molded plastic
tail light covers. These covers are made from red translucent plastic. They are
approximately 70 x120 mm in size. Like most tail light covers, these have
a regular arrangment of small pyramid structure on their back sides. These
small structure allow the covers to reflect light so that head lights
hitting the covers will cause a reflection even when the tail and/or brake
light is not on. All the covers to be examined are of one design. You are
to find discolorations and cracks. You must also make sure that the four
holes that allow the tail light to attached to the car are all present at
the appropriate location and are of the appropriate dimension. Finally
you should be able to detect areas that might not have been molded
correctly and are too thin. While the rotational orientation of the covers
cannot be controlled, they will always have the same surface facing up.
What hardware, imaging a nd lighting geometry and algorithms do I need?