cs026_5 - Topic 4 Introduction to Media Computation:...

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Unformatted text preview: Topic 4 Introduction to Media Computation: Digital Pictures Notes adapted from Introduction to Computing and Programming with Java: A Multimedia Approach by M. Guzdial and B. Ericson, and instructor materials prepared by B. Ericson. 5-2 Learning Goals To understand at a conceptual level What is media computation? How do digital pictures work? 5-3 What is Media Computation? Media computation is the processing of some collection of Picture elements Sound fragments Movie frames Text files Web (HTML) pages 5-4 What are Digital Media? Digital data refers to the encoding of information in bits (0s and 1s) Digital media are electronic media that record a numeric encoding (as opposed to recording continuous ( analog ) signals) Example: a digital camera captures and stores photos as digital data on a memory card rather than on film Example: CDs and DVDs sample sound waves and record numbers that represent the sound at the time of that sample 5-5 How Does Color Vision Work? Our eyes contain Rods that allow us to see black, white, and shades of gray Cones that allow us to see in color Cones are sensitive to red , green , and blue light All other colors are combinations of these Our eyes and brain work together to make sense of what we see 5-6 Red, Green and Blue Light On a computer, we can produce white light as a combination of the full intensities of red, green, and blue combined Black is the absence of all light...
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cs026_5 - Topic 4 Introduction to Media Computation:...

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