Question

How can computers store pictuers when they only use numbers?

Answer 1

• Images are stored in the form of a matrix of numbers in a computer where these numbers are known as "pixel values".
• 0 represents black and 255 represents white.
• The computer records a number to represent the colour of each square.
• It works a bit like a digital colour by numbers! The more squares in the grid, the better the images will look, as more pixels are used to represent the image.