Representing Images

A system that uses 10 digits

A system that uses 2 digits

A system that uses 8 digits

A system that uses 16 digits

0 + 0 = 0

0 + 1 = 1

1 + 1 = 1 0

1 + 0 = 2

87

85

112

50

A group of bits

The smallest unit of a digital image

A colour code

A binary file

Binary item

Binary digit

Binary text

Binary tool

The height and width of an image

The number of bits used to represent each pixel

The brightness of colours

The number of bytes in a file

Mathematical equations

Coloured pixels

Sound waves

Binary digits only

Pixels

Binary patterns

The mathematics needed to draw shapes

File names

Bitmap

Vector

Photograph

Text file

4

6

8

16

Width × Height

$$2^n$$

Height ÷ Width

n + 2

1-bit colour

4-bit colour

8-bit colour

2-bit colour

The number of bytes in a file

Pixel density (dots per inch)

Colour combinations

File speed

The image becomes blurrier

Fewer pixels fit on the screen

Pixel density increases

The image file size decreases

Data about the image, such as width, height, and colour depth

A type of colour code

A way to compress files

The image background

It stores colour depth only

It helps the computer display the image correctly

It adds sound to an image

It increases resolution

Width × Height × Colour Depth

Width + Height × Colour Depth

Width × Colour Depth ÷ Height

Width ÷ Colour Depth

400 bits

80 bits

40 bits

800 bits

Decrease the image quality

Reduce file size

Increase file size

Have no effect

It reduces image clarity

It allows more than 16 million colours

It takes up less space

It uses grayscale only

Bitmaps are made up of pixels; vectors use mathematical formulas

Vectors use pixels; bitmaps use formulas

Both are pixel-based

Both lose quality when resized

It uses fewer colours

It scales without losing quality

It’s easier to store in binary

It has smaller resolution

It stays the same

It doubles

It halves

It becomes black and white

Images are stored using sound waves

Images are stored in binary as either bitmaps or vectors

Images are made of letters and digits

Images cannot be represented digitally

Resolution and colour depth

Height and width only

Binary and ASCII

Bit and pixel

Pixels

Numbers

Sounds

Letters

pixel

byte

vector

sample

Each pixel is enlarged, causing loss of detail

Vector mathematics improves clarity when enlarged

Metadata changes the file type during resizing

Colour depth automatically decreases when resizing

colour depth

resolution

width

brightness

65,536

16.7 million

256

1024

Image brightness

Pixel density

Colour variation

File type

pixels

bytes

colours

bits

More pixels capture more detail

It reduces colour depth automatically

It lowers file size, removing compression artifacts

It changes the file type to a clearer format

The binary code for colours

Information about the image

Sound data

Mathematical shapes