MULTIMEDIA AND QUALITY OF SERVICE
COMPRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Increasing the width, height or colour depth will increase the file size. Files can therefore be kept smaller by not having lots of spare white pixels and only using the necessary number of colours for the colour depth. If the image above had a colour depth of 8 then that would allow for 256 colours.
Detailed explanation-2: -The colour depth determines how many colours can be represented on an image. With a colour depth of n bits, a computer can represent 2^n different colours. For example, if the colour depth is 1 bit, there are only 2^1 = 2 possible colours-black and white, whereas if is is 24 bits, there are 16, 777, 216 possibilities.
Detailed explanation-3: -Colour Depth and Resolution If we use two bits for each pixel, we can display four different values so we can have four colour images. This is known as the colour depth and this information is stored in the metadata for the file.