The paper presents the method for the monitoring of aluminium extrusion processes. The
developed hybrid method combines the advantages of computer based, simultaneous
infrared and visible image analysis for surface inspection of the profile directly after leaving
the die. Thermograms present the temperature distribution on the surface of the extruded
profile and contain information about the extrusion process. The proposed inspection
system can be applied in industry for on-line monitoring of aluminium extrusion processes
and the inspection of defects arising in extruded products