Images

• What are Pixels?


  Elements of a digital image and are arranged in a grid of columns and rows.
• What is Resolution?


  The number of pixels in a digital image.
• What is the Colour Depth?


  The number of binary digits used to represent the colour of each pixel.
• Digital painters use light in different colours and brightness levels to create new colours. The main colours they use are RBG: red, green and blue.
• CDs usually use 24 bits, with 8 bits for each colour (red, green and blue).
• The minimum value for RGB, when using 8 bits for each colour, is 0. This represents no light, resulting in black.
• The maximum value for RGB, with 8 bits for each colour, is 255. This represents the brightest intensity of that colour.
• Total number of colours (with 8 bits for each colour) 256³ = 16777216 colours
• Representation size = resolution (rows × columns) × colour depth (bits per pixel)
• $0\ +$$0\ =$$\ 0$
• $1\ +$$\ 0\ =$$\ 1$
• $1+$$1\ =$$10$ =(2)
• $1\ +$$\ 1\ +$$1\ =$$\ 11$ =(3)
• $101\ +$$\ 11\ =$$\ 1000$ =(8)