AP Computer Science Principles Unit 2 Chapter 1

heuristic

a problem solving approach (algorithm) to find a satisfactory solution where finding an optimal or exact solution is impractical or impossible.

lossless compression

a data compression algorithm that allows the original data to be perfectly reconstructed from the compressed data

image

a type of data used for graphics or pictures

metadata

is data that describes other data. for example, a digital image might include metadata that describes the size of the image, number of colors, or resolution.

pixel

short for "picture element". it is the fundamental unit of a digital image, typically a tiny square or dot which contains a single point of the color of a larger image

RGB

the RGB color model uses varying intensities of (R)ed, (G)reen, and (B)lue light are added together in to reproduce a broad array of colors

Lossy Compression

(or irreversible compression) a data compression method that uses inexact approximations, discarding some data to represent the content. Most commonly seen in image formats like .jpg.

abstraction

pulling out specific differences to make one solution work for multiple problems