Project 5: Lightfield Camera Marc WuDunn .

Part 1: Depth Refocusing To create a depth of field effect using images in the light field grid, I first shifted the different images relative to the center image (image 08,08 in the grid), and then blended the results together. Without shifting the images, the focus is on the back of the image, as the change in position of objects further from the camera is smaller for movements that keep the optical axis direction unchanged. For the images below, the shift amount was varied from [-0.2, 0.6].

Part 2: Aperture Adjustment By sampling from the plenoptic function for nearby images and blending them together, we can mimic changes in aperture size, because nearby images are relatively similar to the focus image, while those far away are less so. Thus, for the aperture adjustment, I shifted all the images within a specified radius to the focus (the center image), and then blended them together. Smaller radii mimicked a small aperture, and larger radii a larger aperture.

Part 3: Summary This project helped me appreciate how light fields can be simulated with only a (relatively) small sample of images. It also made me very interested in how virtual reality and graphics software work with light fields to produce different effects.