Creating Digital Artifacts Using Multimedia

Digital images, sounds, and videos are nothing more than a series of 1s and 0s. The process of encoding those bits into a digital form is called digitization. You may have used a photo or audio editing program to manipulate images and sound. Media computation refers to the computer performing lots of operations on bytes to manipulate digital artifacts and create new ones. In this module, we will discuss how pictures are represented in the computer and learn how to manipulate images at the "pixel" level to create digital artifacts. We will also work with digitized sound by adding it to existing programs.

Essential Questions

How are images and sounds stored in a computer?
What is the importance of arrays and 2D arrays in programming?
How can you change the appearance of an image?
How are images related to 2D arrays?
How do you access and manipulate the pixels in an image?
How are sounds processed in a computer?

Key Terms

digitization – the process of converting media into bits

array – a sequence of like elements that are stored in index locations

2D array – is an array of arrays. It is used to store the pixels in an image

pixel – a single picture element

bitmap – a two-dimensional array full of pixels

media computation – manipulating media artifacts such as pictures, sound, and video to create new artifacts

data compression – is the process of reducing the size of files by compressing the data or reducing the amount of bits from the original representation

lossless data compression – reduces the file size without any loss of data quality

lossy data compression – is a method of encoding that uses approximations, or partial data, for representing the content of the information encoded

class - is a program-code-template for creating objects

object - represents things in the real world; it has a state and a behavior

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