https://hackerpaper.kaipfister.de/p/2006.05698/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=25668300urn:hackerpapers:mention:2006.05698:25668300Thu, 07 Jan 2021 07:37:33 GMT<p>Depth of field effects caused by long focal length lenses (preferred in portraiture for this reason), called &quot;bokeh&quot;. In this case the light is coming into front lens elements, and it doesn&#x27;t appear to be corrected for distortion, and then not uniformly focused onto the surface of the camera&#x27;s sensor. Potentially this was for a Imax dome. So, no, this doesn&#x27;t have anything to do with smart phones. In ye&#x27; olde times, induced background blur would have been a gaussian blur in software. I&#x27;m not sure what special magic they do today. https://arxiv.org/abs/2006.05698 suggests things have moved on.</p><p><a href="https://hackerpaper.kaipfister.de/p/2006.05698/">Paper and discussion history</a>. A mention is not an endorsement.</p>cs.CV