October 2018
Beginner
734 pages
22h 15m
English
Content preview from Fundamentals of Computer Graphics, 4th EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 9
Signal Processing
In graphics, we often deal with functions of a continuous variable: an image is the first example you have seen, but you will encounter many more as you continue your exploration of graphics. By their nature, continuous functions can’t be directly represented in a computer; we have to somehow represent them using a finite number of bits. One of the most useful approaches to representing continuous functions is to use samples of the function: just store the values of the function at many different points and reconstruct the values in between when and if they are needed.
You are by now familiar with the idea of representing an image using a two-dimensional grid of pixels—so you have already seen a sampled representation! ...
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