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level: Images

Questions and Answers List

level questions: Images

QuestionAnswer
Describe how bit patterns may be used to represent graphicsLines of bits with combinations of 1s and 0s making up the specrum of colour for each pixel
Explain how bitmaps are representedA 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 imageNumber 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 computerVector graphics Bit map images
Whats the colour depth of a bitmap image and how do you calculate itThe 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 itNumber of pixels in an image height X width
What is meta data and give some examplesMetadata 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 imagesLines 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 objectsFill colour, fill style, line thickness, line colour and dimensions
Compare vector grpahics vs bitmap graphicsVector 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