S3 Colour Depth

Screen size can also be called...

• dots per inch
• Resolution
• HD size
• Backing storage

A 4K TV and an HD TV may have the same dimensions (e.g. 42 inch TVs) but they have different resolutions. Why is this?

• The 4K has more dots per inch than the HD
• The HD has more dots per inch than the 4K
• The colour depth of the HD is higher
• The colour depth of the 4K is higher

 A bitmap image uses 1 and 0 to represent each pixel. Which of the following is true for this image?

• The image has 4 colours
• The image is in black and white
• The image is greyscale
• The image uses 256 colours

 A bitmap image uses 3 bits to represent each pixel. Which of the following is true for this image?

• The image has up to 8 colours
• The image is in black and white
• The image is greyscale
• The image uses 256 colours

A bitmap image has a colour depth of 4 bits. What does this mean?

• The image uses 4 bits for every pixel
• The image has a resolution of 4K
• The image is 4 bits in size
• The image uses 256 colours

What is the colour depth of an image that has 256 colours available for each pixel? (hint: think about binary)

• 7 bits
• 16 bits
• 24 bits
• 8 bits