Our eyes can spot edges with no problems, but how do computers determine what's an edge and what's not? Image Analyst Dr Mike Pound explains the Sobel Edge detector.

How Blurs & Filters work:    • How Blurs & Filters Work  Computerphile  
The Problem with JPEG:    • The Problem with JPEG  Computerphile  
Secrets Hidden in Images (Steganography):    • Secrets Hidden in Images (Steganograp...  
Man in the Middle Attacks:    • Man in the Middle Attacks & Superfish...  

Mike's Code in a zip file: http://bit.ly/computerphileEdge

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  / computer_phile  

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