Project 5: Lightfield Camera

Raymond Chu - cs194-26-aak

Overview

In ths project, we use lightfield data taken by a 17x17 grid of parallel cameras to simulate depth refocusing and artificial changes in aperature size. Using basic linear algebra, we can combine all of these *slightly* different images to achieve cool effects.

Depth Refocusing

We average all the images based off certain alignments to sharpen/blur specific parts of the image (foreground/background). To do this, we collect the coordinates of the camera per image and shift it towards the center image [8,8] with a specific constant alpha to achieve the desired results:
Shift each image by [alpha * (centerX - x), alpha * (centerY - y)] for all x,y in [0,17] and alpha in [-0.5, 0.5]

alpha = 0	alpha = 0.1
alpha = 0.25	alpha = 0.5

alpha from range -0.5 to 0.6 (interval of 0.25)

Aperture Adjustment

We simluate different apertures by changing the radius of cameras around the center camera. We average all the images taken by the cameras with a euclidian distance less than radius between the center for all radius in [0,8].

Radius = 0	Radius = 2
Radius = 4	Radius = 7

Radius from range 0 to 8