Is it possible to make a bad picture into a good picture with photo editing? When scientists enhance pictures from telescopes, are they really doing science, or are they just indulging their imaginations? Just how far can you zoom in to get information? When you're manipulating images, you have to be able to separate usable information from background noise.
This article will explain how photo editing software uses trigonometric identities and substitution to adjust the value of pixels in an image. There is a corresponding video and links to additional information.