基于光场相机的超分辨率焦点堆栈的研究

A Super—resolution Focal Stack Technology Based on Light Field Camera

光场相机采用微透镜阵列测量场景中所有光线的辐射度和方向信息;因为它们捕捉的是一个场景中的四维光场信息,所以大大增强了当前商用相机性能;通过处理这些已经记录的光场信息,这些相机能够在拍摄后重新聚焦场景和获得三维信息;文章基于光场相机结合焦点堆栈变换,引入新的超分辨率焦点堆栈,提出了一种新的同时估计深度图和场景全聚焦超分辨率图像的技术;实验结果表明可以获得很好的重聚焦图像和深度图。

Light Field cameras use a microlens array to measure the radiance and direction of all the light rays in a scene. They are a promising solution to increase the capabilities of current commercial cameras because they capture the four--dimensional lightfield of a scene. Processing the recorded lightfield, these cameras offer the possibility of focusing the scene after the shot or obtaining 3D information. This paper presents a new technique to simultaneously estimate the depth map and the all--in--focus image of a scene at super--resolution, which combined with the focal stack transform and a new super--resolution focal stack, from a Light Field camera. The experimental results show that it can obtain much better refocused image and depth map.