In this article, they talk about encoded blur. http://web.media.mit.edu/~raskar/Mask/ http://web.media.mit.edu/~raskar/Mask/ About halfway down the page you c

In this article, they talk about encoded blur. http://web.media.mit.edu/~raskar/Mask/ http://web.media.mit.edu/~raskar/Mask/ About halfway down the page you can see the out-of-focus point source looks identical to the coded aperture. While not lensless photography, this seems like a good starting point for those interested in these techniques, especially if I can load the PSF into ImageJ.