|
篇名
|
Light Field Photography with a Hand-held Plenoptic Camera
|
|
期刊
|
Stanford University Computer Science Tech Report CTSR 2005-02
|
|
DOI
|
/
|
|
作者
|
Ren Ng, Marc Levoy, Mathieu Brédif et al
|
|
日期
|
April, 2005
|
|
摘要
|
This paper presents a camera that samples the 4D light field on its sensor in a single photographic exposure. This is achieved by inserting a microlens array between the sensor and main lens, creating a plenoptic camera. Each microlens measures not just the total amount of light deposited at that location, but how much light arrives along each ray. By re-sorting the measured rays of light to where they would have terminated in slightly different, synthetic cameras, we can compute sharp photographs focused at different depths. We show that a linear increase in the resolution of images under each microlens results in a linear increase in the sharpness of the refocused photographs. This property allows us to extend the depth of field of the camera without reducing the aperture, enabling shorter exposures and lower image noise. Especially in the macrophotography regime, we demonstrate that we can also compute synthetic photographs from a range of different viewpoints. These capabilities argue for a different strategy in designing photographic imaging systems.
|
|
推荐理由
|
本文提出了一种新型相机—光场相机的设计，通过在主镜和传感器之间插入微镜头阵列，实现对场景各部位光线的记录，从而达到拍照无需对焦，无快门延迟，拍完可以通过处理软件自由调整焦点的效果。
Lytro公司于2011年10月20日正式发布了世界首款消费级光场相机。
|
|
供稿
|
阮望超
|
