Image in Pixels and Binary (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 does the term 'pixel' stand for?
What does the term 'pixel' stand for?
Picture element
In binary, which digit represents a black pixel in a black and white image?
In binary, which digit represents a black pixel in a black and white image?
1
What binary digit represents a white pixel?
What binary digit represents a white pixel?
0
Convert this pixel row to binary: white, black, black, white, black
Convert this pixel row to binary: white, black, black, white, black
01101
An image is 5 pixels wide and 7 pixels tall. How many pixels does it contain?
An image is 5 pixels wide and 7 pixels tall. How many pixels does it contain?
35 pixels
What does higher resolution mean for an image?
What does higher resolution mean for an image?
More pixels and clearer detail
What does colour depth refer to?
What does colour depth refer to?
How many colors each pixel can show
How many colors can be represented with 8 bits per pixel?
How many colors can be represented with 8 bits per pixel?
256 colors
How many bits per pixel are needed to display 4 different colors?
How many bits per pixel are needed to display 4 different colors?
2 bits
What formula calculates file size for an image?
What formula calculates file size for an image?
width × height × bits per pixel
An 8×8 pixel image uses 2 bits per pixel. What is the file size in bits?
An 8×8 pixel image uses 2 bits per pixel. What is the file size in bits?
128 bits
What is the trade-off with higher resolution images?
What is the trade-off with higher resolution images?
Better quality but larger file size