Methods and apparatus for reducing plenoptic camera artifacts

摘要

Methods and apparatus for reducing plenoptic camera artifacts. A first method is based on careful design of the optical system of the focused plenoptic camera to reduce artifacts that result in differences in depth in the microimages. A second method is computational; a focused plenoptic camera rendering algorithm is provided that corrects for artifacts resulting from differences in depth in the microimages. While both the artifact-reducing focused plenoptic camera design and the artifact-reducing rendering algorithm work by themselves to reduce artifacts, the two approaches may be combined.

主权项

1. A camera, comprising:
a photosensor configured to capture light projected onto the photosensor; an objective lens, wherein the objective lens is configured to refract light from a scene located in front of the camera to form an image of the scene at a focal plane of the objective lens; a microlens array positioned between the objective lens and the photosensor, wherein the microlens array comprises a plurality of microlenses, wherein the plurality of microlenses are focused on the focal plane and not on the objective lens; wherein each microlens of the microlens array is configured to project a separate portion of the image of the scene formed at the focal plane on which the microlens is focused onto a separate location on the photosensor; and wherein the camera is configured so that difference in magnification ΔM of the microlenses at different depths in the image of the scene is less than magnification M of the microlenses.