| Describe how bit patterns may be used to represent graphics | Lines of bits with combinations of 1s and 0s making up the specrum of colour for each pixel |
| Explain how bitmaps are represented | A bitmap is laid out in a grid format with each box on the grid containing 1 pixel
Each pixel has a binary value assigned to it
The binary value denotes the colour of the pixel
Hundreds/ thousands of these make up an image |
| Define the resolution of a bitmap image | Number of pixels per inch |
| Define the 'storage' of a bitmap image
And how do you calculate it (ignoring metadata) | Size required to store the image altogether
width × height x bit depth |
| What the two ways in which images can be represented by a computer | Vector graphics
Bit map images |
| Whats the colour depth of a bitmap image and how do you calculate it | The number of bits assigned to a pixel
2 ^ number of bits per pixel |
| Whats the size in pixels of a bitmap and how do u calculate it | Number of pixels in an image
height X width |
| What is meta data and give some examples | Metadata is data that gives information about other data
Width, height, date created and colour depth |
| Why is the equation of 'Width x height x bit depth' described to be the 'minimum size' | Metadata |
| Explain how vector graphics represents images | Lines and curves are used to form shapes
The properties of each geometric shape in the vector graphic image are stored as a list
Multiple, cleverly placed shapes form an image |
| For vector images...
Give examples of typical properties of objects | Fill colour, fill style, line thickness, line colour and dimensions |
| Compare vector grpahics vs bitmap graphics | Vector graphics can be scalled as they use shapes rather than pixels
Vector graphics are well suited for logos whereas bitmap images are better suited for images
Vector graphics require less storage space as information is stored for each shape, rather than for every single pixel in an image |
| In what type of data can metadata be stored with? | Both |
