CS - Data Rep - Graphics - Bitmap Flashcards

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1
Q

What are bitmapped graphics?

A

A bitmapped graphic is a 2D array of pixels

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2
Q

What is the resolution?

A

It is the total number of pixels in an image (usually measured in ppi or dpi)

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3
Q

Define and compare bit depth AND colour depth

A
  • BIT depth = number of colours that can be used/stored in an image
  • COLOUR depth = number of bits used to represent the colour of each pixel.

(USE YOUR BRAIN TO COMPARE)

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4
Q

The more bits allocated to each pixel…

A

…the larger the file size

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5
Q

Describe a high resolution image

A
  • small pixels
  • many pixels
  • good quality
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6
Q

Describe a low resolution image

A
  • large pixels
  • fewer pixels
  • poor quality
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7
Q

Give one advantage and disadvantage of bitmapped graphics

A

Advanatage - They can be manipulated at pixel level

Disadvantage - The image becomes jagged when scaled

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