Authors:Masato Hirose;Fumihiko Sakaue andJun Sato
Affiliation:Nagoya Institute of Technology, Nagoya, Japan
Keyword(s):Light Field Camera, Variable Focal Lens, Coded Imaging.
Abstract:In this study, we propose a method for acquiring a dense light field in a single shot by taking advantage of the sparsity of the 4D light field (LF). Acquiring the LF with one camera is challenging task due to the amount of data. To acquire the LF efficiently, there are various methods like using micro-lens. However, with these methods, images are taken using a single image sensor, which improves directional resolution but reduces positional resolution. In our method, the focal length of the lens is varied, and the exposure is controlled on a pixel-by-pixel level when capturing a single image to obtain a mixed focus image, where each pixel is captured at a different focal length. Furthermore, by analyzing the captured image with an image generator that does not require prior learning, we show how to recover a LF image that is denser than the captured image. With our method, a high-density LF consisting of 5x5 images can be successfully reconstructed only from a single mixed-focus image taken under a simulated environment.(More)
In this study, we propose a method for acquiring a dense light field in a single shot by taking advantage of the sparsity of the 4D light field (LF). Acquiring the LF with one camera is challenging task due to the amount of data. To acquire the LF efficiently, there are various methods like using micro-lens. However, with these methods, images are taken using a single image sensor, which improves directional resolution but reduces positional resolution. In our method, the focal length of the lens is varied, and the exposure is controlled on a pixel-by-pixel level when capturing a single image to obtain a mixed focus image, where each pixel is captured at a different focal length. Furthermore, by analyzing the captured image with an image generator that does not require prior learning, we show how to recover a LF image that is denser than the captured image. With our method, a high-density LF consisting of 5x5 images can be successfully reconstructed only from a single mixed-focus image taken under a simulated environment.