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: https://youtu.be/C_zFhWdM4ic
The Problem with JPEG: https://youtu.be/yBX8GFqt6GA
Secrets Hidden in Images (Steganography): https://youtu.be/TWEXCYQKyDc
Man in the Middle Attacks: https://youtu.be/-enHfpHMBo4
Mike's Code in a zip file: http://bit.ly/computerphileEdge
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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