Part 1: Depth Refocus
To refocus the depth, I simply took the grid of 289 images and realigned them so that the area I want to focus on was aligned, and unfocused areas were simply averages of the images and their slight displacements. By varying the alpha value that I scaled the realignments, I could vary the depth that I was focusing in on. A more negative value allowed a shallower focus, while a more positive value allowed a deeper focus.
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Part 2: Aperture Adjustment
To adjust the aperture, I simply varied the number of images I was averaging while I picked a focal point. I tried to make them interesting by picking a focal point that was more in the foreground of the image so that you could see the blurring increase in both the background and foreground.
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