Representing Images Flashcards
What is a pixel?
A pixel is the smallest identifiable area of an image.
What is Resolution?
Resolution is the concentration of pixels within a specific area.
MORE BITS PER PIXEL = MORE COLOUR COMBINATIONS
TRUE OR FALSE
TRUE
1 bit = 2 colours
2 bit = 4 colours
3 bit = 8 colours
4 bit = 16 colours
5 bit = 32 colours
What is the benefit of having a higher bit depth?
Gives a greater range of colour and a better quality of image.
How does number of colours affect file size?
An increase in the number of colours that are used in an image will increase the file size.
How does the size of the image affect file size?
An increase in the number of pixels (resolution) in the image will increase the file size
How do you calculate image size in bits?
Size in bits = Width x Height x Colour depth (bits)
Size in bytes = Width x heigh x colour depth / 8
What is metadata?
Metadata is data about data
What is a bitmap graphic made up of?
Individual pixels
What is each pixel represented in?
Binary
