Compsci test 1

Binary is read

left to right

each number added

doubles the possibilites

each number can be either _ or _

1, 0

Each number is a value of

2^n

binary starts at

2^0

Rounding error

difference between rounded and actual numbers

overflow error

data is too large to represent in given memory slot

underflow error

number is too close to 0, so rounds to 0

Standards

help make sure that all characters are understood through multiple languages and devices.

In ASCII, every character has a

binary representation

Black in binary is

0

White in binary is

1

more pixels means

higher resolution

in color images, every group of bits is divided into

3.

3 Binary colors are

red, green, blue

In color images, higher the number on the colors designated third

brighter that color

Losseless compression

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

Metadata

data that describes other data. ex. image size, number of colors, or resolution.

Lossy compression

A data compression method that uses inexact approximations, discarding some data to represent the content.

Lossy data character/phrase

replace repeated phrases/words with a variable.

Compression ratio formula

(# bytes compressed out/# of bytes in original message) * 100

image

A type of data used for graphics or pictures

RGB

The color model that uses varying intensities of red, green, and blue light, added together in to reproduce a broad array of colors

Pixel

The fundamental unit of a digital image, typically a tiny square or dot which contains a single point of color of a larger image

ASCII

The universally recognized raw text format that any computer can understand

__ bits of metadata that describes (1) _ (2) _ and (3) _

24, width, height, bits per pixel

How many bits are required to encode a x by y color image, encoded with z bits of RGB data?

1. xy 2. xyz 3. xyz + 24

How many bites in a byte?

8

A huge video can be shorter than a smaller video IF

the huge video goes through lossy compression

x amount of bits makes how many possible combinations

2^(number of bits)