Abstract
We propose a practical method that efficiently acquires light transports from arbitrary objects by using push broom-type projector illumination; vertical-strip and horizontal-strip light patterns are used. The combinations of vertical-strip and horizontal-strip camera responses allow our method to obtain light transports between each overlapped projector pixel and the camera response detected in common. Our method significantly reduces the number of camera response images needed for acquiring all light transports compared to brute-force scanning. Tests of the proposed method using real images show that it obtains more accurate light transports from various objects than brute-force scanning, and the resulting light transport matrix faithfully reproduces the original images. We demonstrate a relighting test based on the light transport matrix and confirm that our method yields relighted images that closely approximate the actual images captured by a camera.
