Can a machine see?   Does it need to see?  Is machine vision similar to human vision?    Before there can be any attempt to answer these questions, vision must first be defined.  Machine vision or computer vision enables a machine to perform certain tasks that in humans requires use of the eyes.  Is it possible for a machine to see, understand and interpret visual objects?  Vision is something that we, as humans, simply do effortlessly.  However, it is not as easy as it seems.  The ability of a human to see requires a significant portion of the brain and many complex "calculations" take place within our heads to "understand" what we are looking at.  These calculations involve many complex parts like neurons and synapses and include chemical and electrical reactions.  Also, we must use algorithms, complex equations, thinking...