Bitmap Image Size and Colour Depth (AQA GCSE Computer Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are bitmap images made up of?
What are bitmap images made up of?
Pixels
How is image size measured in bitmap images?
How is image size measured in bitmap images?
Width × height in pixels
An image is 200 pixels wide and 300 pixels tall. How many total pixels does it contain?
An image is 200 pixels wide and 300 pixels tall. How many total pixels does it contain?
60,000 pixels
What does higher resolution in a bitmap image result in?
What does higher resolution in a bitmap image result in?
Sharper and more detailed images
What does color depth (bit depth) tell us?
What does color depth (bit depth) tell us?
How many colors each pixel can display
Using the formula , how many colors can 3 bits per pixel display?
Using the formula , how many colors can 3 bits per pixel display?
8 colors
How many different colors can 8 bits per pixel display?
How many different colors can 8 bits per pixel display?
256 colors
How many colors can 2 bits per pixel create?
How many colors can 2 bits per pixel create?
4 colors
In a 2-bit system with codes 00=white, 01=red, 10=green, 11=black, what does 10 represent?
In a 2-bit system with codes 00=white, 01=red, 10=green, 11=black, what does 10 represent?
Green
What happens to file size as color depth increases?
What happens to file size as color depth increases?
File size increases significantly
What is the formula for calculating bitmap file size in bytes?
What is the formula for calculating bitmap file size in bytes?
What color depth is often used for web graphics?
What color depth is often used for web graphics?
8-bit (256 colors)