Image stacking is often used in astrophotography. By combining multiple images and averaging the results, random noise will be reduced.
Short exposures of the stars taken by a fixed camera can be combined by stacking to produce star trails.
The technique can also be used in landscapes, where multiple images are taken with different apertures
- What is image stacking as it relates to astrophotography?
- How can I simulate a long exposure photo using a set of shorter exposure photos?
- Can stacking multiple exposure images in post-processing give the same effect as a long exposure?
- Can I combine several low quality pics into one higher quality picture?
- How does averaging images or lowering resolution reduce noise?