How Blurs Filters Work Computerphile

Image filters make most people think of Instagram or Camera Phone apps, but what s really going on at pixel level Image Analyst Dr Mike Pound explains some of the most common filters. Secrets Hidden in Images (Steganography): JPEG files Colour: The Dress: The VR Cave: JPEG Discrete Cosine Transform (DCT): This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: Computerphile is a sister project to Brady Haran s Numberphile. More at