Scaling images is usually smoother using bicubic interpolation. Dr Mike Pound explains why.

More on bicubic: http://bit.ly/Computerphile_bicubic1
Wikipedia bicubic article: http://bit.ly/computerphile_bicubic_wiki

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This video was filmed and edited by Sean Riley.

Computer Science at the University of Nottingham: http://bit.ly/nottscomputer

Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com