1.2 Images

Bitmap or 'raster' graphics are made up of _______

• Shapes and lines
• Pixels

Vector graphics are made up of _______

• Shapes and lines
• Pixels

Vector graphics are 'cartoon like', whereas raster graphics are of real life -  True or False?

• True
• False

A pixel is the _______ part of an image.

• Smallest
• Largest

The colour of a pixel can be stored as a _______ number

• Unicode
• Hex
• Binary
• ASCII

Each pixel is displayed using a combination of what three colours?

• Blue, green and purple
• Red, grey and white
• Red, green and blue
• White, red and blue

How does a higher picture resolution effect quality & file size?

• Quality is improved as there is more detail, file size is larger

• Quality is worse, as there is less detail but a smaller file size.

Define what is meant by the term 'metadata'.

• Metadata is the smallest element of an image.
• Metadata is the number of bits used to store the colour of a pixel.
• Metadata refers to information stored about an image.
• Metadata is a lossy compression file format that allows for very compact file sizes.

What metadata would you need to interpret this binary data and reconstruct an image?
10 01 10 11 00 11 00 11 01 00 00 01 00 10 00 00 11

• How many bits were used per pixel.
• Width and height of the image in pixels.
• Both are needed

Which of the following is NOT metadata that could be stored about an image?

• Pixel width and height.
• Picture resolution measured in DPI
• Camera name and model.
• Printer description