How to restrict direct access to the nodes? How to restrict direct access to the nodes but just allow views to access the required field of the particular node type?

For example in Views Slideshow we are sliding the image field that belongs to particular node type. But we don't want search engines to access &amp; visitors to access the nodes belong to that node type.

Any suggestions?
A simple solution would be to not publish the nodes you don't want to be accessible. Views can still pull the data from those nodes.