Digital Images

What is a pixel?

• A dot or square in an image or computer screen

• A type of digital image file

• A line in an image or computer screen

• A layer in a Paint.NET image

What is meant by the term 'resolution'?

• The amount of pixels in an image or computer screen.

• The physical size of a computer screen

• The amount of different colours in an image

• How fast an image is loaded

Write down a definition for the term 'Opacity'

What is meant by the term 'aspect ratio'?

• The physical size of a computer screen

• The ratio of horizontal to vertical pixels in an image or screen

• The ratio of black to white in an image

• The ratio of transparent and opaque pixels

Tick all the file extensions that relate to digital images

• .gif

• .jpg

• .png

• .zip

• .exe

Explain what is meant by 'Colour Depth'

What do the acronyms RGB and CMYK refer to? Explain

Which of the following images shows an example of anti-aliasing?

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Which side of the image above is an example of a Vector image?

• Left

• Right

Check all the options that relate to 'refresh rate'

• Hz

• ms

• Gigabytes

• resolution

• dpi