In what cases is undersampling acceptable? Or, when would we generally want to sacrifice higher quality for efficiency?
msfernan
There are some cases when one needs to make a tradeoff between properly sampling a small field of view and under-sampling a large field of view. This has something to do with camera optics. It is possible to use image processing techniques to properly reconstruct the under-sampled images. One application of this is in astronomy where you have to process large amounts of planetary image image data from telescopes. See https://en.wikipedia.org/wiki/Drizzle_(image_processing) for more details.
In what cases is undersampling acceptable? Or, when would we generally want to sacrifice higher quality for efficiency?
There are some cases when one needs to make a tradeoff between properly sampling a small field of view and under-sampling a large field of view. This has something to do with camera optics. It is possible to use image processing techniques to properly reconstruct the under-sampled images. One application of this is in astronomy where you have to process large amounts of planetary image image data from telescopes. See https://en.wikipedia.org/wiki/Drizzle_(image_processing) for more details.