Plenoptic Camera

Korey Nicholas Rouse

Abstract


The addition of a microlens array in front of an image sensor transforms a normal camera into a plenoptic camera capable of capturing the 4D light field information contained within a scene. To make effective use of the image sensor the working focal numbers of the main lens is designed to match the microlens. Reconstructing an image from a plenoptic camera can be achieved by sampling a number of pixels from the centre of each microimage and tiling them together. The sample size can then equate to a distance relative to the main lens through the use of geometric optics and the thin lens equation. The relationship between the microlens focal length and the distance from the image sensor determines the application of the plenoptic camera. Matching the microlens focal length to the microlens distance from the image sensor results in a standard plenoptic camera that favours image resolution and digital refocussing. A focussed plenoptic camera has a slightly larger distance to image sensor than focal length and has the advantage of better depth estimation abilities. Combining experimental results with research demonstrates the concepts behind the plenoptic camera

Keywords


plenoptic camera; light field imaging;

Full Text:

PDF