关注可能发生的一次影像革命

smellfish

好像paper是他写的：http://graphics.stanford.edu/~renng/
公司主页这里： http://www.lytro.com/

光学上的重大改革很缓慢，数码成像算一个，希望这个是第二个成功的。

Abstract

This paper contributes to the theory of photograph formation from light fields. The main result is a theorem that, in the Fourier domain, a photograph formed by a full lens aperture is a 2D slice in the 4D light field. Photographs focused at different depths correspond to slices at different trajectories in the 4D space. The paper demonstrates the utility of this theorem in two different ways. First, the theorem is used to analyze the performance of digital refocusing, where one computes photographs focused at different depths from a single light field. The analysis shows in closed form that the sharpness of refocused
photographs increases linearly with directional resolution. Second, the theorem yields a Fourier-domain algorithm for digital refocusing, where we extract the appropriate 2D slice of the light field's Fourier transform, and perform an inverse 2D Fourier transform. This method is faster than previous approaches.

skisnowboardca

sofa                             

Bingster

Got an idea. But don't understand how it really works.

lupo

存好钱，等新机器！

lupo

网站上面有样片和成像原理
http://www.lytro.com/picture_gallery


真的蛮厉害的，先拍照再对焦！这需要多大数据处理能力的芯片？拍一张照片需要多久？

几亩瓜

有点意思, 不知道是不是一个新格式里面压缩了几(2-5)个不同远近的可能对焦照片