Images
On a computer all data is stored as binary
What is a pixel?
A small square that makes up a part of an image.
Resolution
The number of pixels in width and height.
To calculate the amount of pictures in an image, multiply the width by height.
Eg
6p * 4p = 24p
Low resolution = less pixels
If you stretch them out they become pixelated. To be able to stretch a picture they need more pixels
PPI and DPI
Pixels per inch
Dots per inch
72PPI for screen
300PPI for print
Width in pixels
Height in pixels
Screen size inches
R = (W * H) / S
Colour Depth/Bit Depth
Measurement of the amount of possible colours that can be displayed with the amount of bits given
Greyscale has 256 possible shades
Each pixel has a number that is made up of binary
4 bit depth, means you have 4 bits, you can represent 4 colours.
More bit depth means more colours.
True colour has 24 bits
RGB Channels
Red
Green
Blue
16777216 Total possible colours
Each pixel is given a binary number to give it a colour
Metadata
Data about data
When it was created
When it was modified
On a computer all data is stored as binary
What is a pixel?
A small square that makes up a part of an image.
Resolution
The number of pixels in width and height.
To calculate the amount of pictures in an image, multiply the width by height.
Eg
6p * 4p = 24p
Low resolution = less pixels
If you stretch them out they become pixelated. To be able to stretch a picture they need more pixels
PPI and DPI
Pixels per inch
Dots per inch
72PPI for screen
300PPI for print
Width in pixels
Height in pixels
Screen size inches
R = (W * H) / S
Colour Depth/Bit Depth
Measurement of the amount of possible colours that can be displayed with the amount of bits given
Greyscale has 256 possible shades
Each pixel has a number that is made up of binary
4 bit depth, means you have 4 bits, you can represent 4 colours.
More bit depth means more colours.
True colour has 24 bits
RGB Channels
Red
Green
Blue
16777216 Total possible colours
Each pixel is given a binary number to give it a colour
Metadata
Data about data
When it was created
When it was modified