# Why Is Super Resolution (SR) Possible?

I've been reading about Super Resolution Image reconstruction (Reconstruction of high resolution image from multiple low resolution aliased images contain sub pixel shifts), and i want to know why SR is possible? this document explains why SR is possible, but i didn't understand completely!

please can you explain more clearly.

• There is no document behind the link (anymore). – Olli Niemitalo Jul 12 '18 at 14:04

The fundamental reason this works is because you are using $p$ times as many (hopefully independent) samples as any individual low-resolution image to form the high resolution image.
• @Khan That depends on where the samples are. If the extra $(p-1) \times N$ samples are between the original $N$ samples, then you can effectively increase the Nyquist frequency. The trick is how to position those extra samples so that is possible. Even if the samples are not uniformly distributed, there are some techniques that allow you to use them. – Peter K. Apr 11 '20 at 17:53