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A vision based application solution is
inherently sensitive to external light. Direct sunlight, 50 Hz
flickering of a fluorescent tube or the shadow of passing objects
may cause inspections to fail. This can be avoided by using a
brighter, more consistent light source that overpowers the ambient
light. By selecting the appropriate lighting technique and by using
filters and colours, the contrast on the features of interest can be
enhanced while disturbing factors can be weakened.