Y12 Data Rep Images

A bitmap image is made up of

• Pixels
• Colours
• Sounds
• Samples
• Characters

Increasing the colour depth means…

• A bigger range of colours can be used for each pixel
• More pixels are in the image.
• More colours are in the image.
• Darker colours

How many colours can be used for each pixel if the colour depth is 4 bit?

• 4 colours
• 5 colours
• 15 colours
• 16 colours

How many colours can be used for each pixel if the colour depth is 8 bit?

• 8 colours
• 9 colours
• 255 colours
• 256 colours

Which is NOT an example of metadata for an image file?

• Resolution
• Colour depth
• Camera used
• Sample rate

Images can contain a geographical location of where the picture was taken. This is stored in a special area of an image file called:

• Metadata
• File name.
• Compression area.
• Alpha-channel.

The following is true about metadata:

• It is data about data.
• It is corrupted data.
• It significantly increases file sizes.

Metadata doesn't contain the following:

• File name.
• Print dimensions.
• Colour depth.
• Camera settings for when the picture was taken.

The following is often stored in metadata:

• All of these.
• Colour depth
• Height and Width of an image
• Compression algorithm applied.

If image metadata is corrupted,

• The resulting picture is not displayed properly.
• It is easily fixed.
• Will not affect printing and displaying of the file.