3.4 Images 0.0 / 5 ? ComputingRepresenting dataGCSEAQA Created by: nelllllllllCreated on: 23-11-21 20:45 What's a pixel? a single point in an image which can have its colour set independently 1 of 10 How is the size of an image expressed? by a number of pixels 2 of 10 If the size of a picture is increased, what will happen? more pixels will need to be stored, meaning the file size will increase 3 of 10 What's a bitmap image? an image made up of binary digits representing the colour of each pixel in an image 4 of 10 If there were 4 colours in an image, how many bits would be needed? 2 bits (00,01,10,11) 5 of 10 What's colour depth? the number of bits per pixel 6 of 10 How do you work out colour depth from the number of colours in an image? You convert the number of colours to the power of 2 (e.g. 2 = 2^1 colours = 1 bit is required) 7 of 10 If the colour depth is increased, what happens to the file size? More bits will be used to represent each pixel, so the overall size will increase 8 of 10 The greater the number of pixels per inch... ...the sharper the image will be and the larger the size of the image 9 of 10 How do you calculate file size? In bits= image width x image height x colour depth 10 of 10
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