基于光场相机获取技术的研究

Research on Light Filed Camera Acquisition Technique

传统的成像方式在拍摄高速运动的物体并且抓拍精彩瞬间时准确对焦是非常困难的,但是利用光场成像技术采集四维光辐射函数比原来多出两个自由度,这样在对图像数据进行重采样时增加了信息量,此外利用数字重聚焦技术可以解决图像失焦等问题。本文主要简要介绍光场的基本定义、光场的四维参数化表示和光场相机中的数字对焦、数字变焦以及数字重聚焦技术的基本原理。

It is very difficult for traditional imaging mode to shoot high-speed object and locus accurately when taking a candid photograph. However, the light field imaging technology can overcome this problem. It collects four-dimensional radiation function which increases two freedom degrees, so the information quantity is increased when the image data is re-sampled. In addition, the digital refocusing technology can solve the problem of out-of-focus images. This paper mainly introduces the basic definition and four dimensional parametric presentation of the light filed, and the elementary principles of digital focus, digital zoom and refocusing.