The goal of this project is to reproduce some of these effects using very simple operations like shifting and averaging and real lightfield data.
The objects which are far away from the camera do not vary their position significantly when the camera moves around while keeping the optical axis direction unchanged. The nearby objects, on the other hand, vary their position significantly across images. Averaging all the images in the grid without any shifting will produce an image which is sharp around the far-away objects but blurry around the nearby ones. Similarly, shifting the images 'appropriately' and then averaging allows one to focus on object at different depths. Here I generate multiple images of the chess board that focus at different depths done by averaging.
Averaging a large number of images sampled over the grid perpendicular to the optical axis mimics a camera with a much larger aperture. Using fewer images results in an image that mimics a smaller aperture. In this part of the project, I generated images which correspond to different apertures while focusing on the same point in the top right.
