What is a digital image?

• an image that is stored electronically
• easily edited
• made up of dots

What is a pixel?

• a pixel is a single dot that when put together with other pixels makes a digital image
• can hold only one colour

What is resolution?

• the quality of the picture measured in dots per inch (dpi)
• more detailed picture and bigger file size

Popular File types

• JPG - high detail, low file size, web safe
• GIF - low detail, low file size, 256 colours, can be animated
• BMP - high detail, high file size, very common
• TIF - used in publishing, high detail, high file size

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