Spring 2018
Signal and Noise
Image capacity of a hard drive
Learn It!
Pre-Requisite Knowledge
Goal
How many images fit on the hard drive?
For the given sizes of image, how many image files will fit on the given hard drive?
Approximately how many "raw" format 12-megapixel ($12 \cdot 10^6$ pixels/image) images can be stored in 9 GB ($\approx 9 \cdot 10^9$ Bytes) of storage, if 24 bits (three colors, 8 bits per color) are stored for every pixel? Hint: 1 Byte = 8 bits
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What is a "raw" image?
Part 1
Arrange quantities
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1A
Dimensional Analysis
$\frac{9 \cdot 10^9 \cdot 8}{12 \cdot 10^6 \cdot 24}=250$
Multiply everything together, respecting units, to get the answer. note that our answer is bigger than 1.