I have carried out experiments around the techniques of computational photography during my M.Sc. These are used to augment the traditional process of image capture with algorithmic parts. The following example is the result of my own implementation of focal point fusion. You can check out the code and report here.
The following images are used as input to the algorithm:
The algorithm detects the most in-focus area of each image, as shown on this map where each color represents an image index:
A final fusion step produces the final result: