{"id":187063,"date":"2011-11-11T00:00:00","date_gmt":"2011-11-19T12:27:40","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/msr-research-item\/the-benefits-of-being-out-of-focus-making-the-most-of-lens-psf\/"},"modified":"2016-08-02T06:10:56","modified_gmt":"2016-08-02T13:10:56","slug":"the-benefits-of-being-out-of-focus-making-the-most-of-lens-psf","status":"publish","type":"msr-video","link":"https:\/\/www.microsoft.com\/en-us\/research\/video\/the-benefits-of-being-out-of-focus-making-the-most-of-lens-psf\/","title":{"rendered":"The Benefits Of Being Out Of Focus: Making the Most of Lens PSF"},"content":{"rendered":"<div class=\"asset-content\">\n<p>The point spread function (PSF) of a lens describes the impulse response of that lens \u2013 how a point light source is imaged.  It is commonly assumed that an out-of-focus (OOF) point&#8217;s image will be blurred, but that is not what happens.  This talk describes some of the things we have learned by studying the properties of OOF PSFs.<\/p>\n<p>The work discussed in this talk began with the observation of minor defects in depthmaps created in-camera using C code for depth-from-focus within a Canon Powershot under CHDK. Understanding these flaws led to a two-year study of the OOF PSF of approximately 100 lenses and creation of a wide variety of new computational photography methods.  One of the simplest involves the capture of anaglyph images using a trivial user-reversible modification to nearly any ordinary camera. These anaglyphs may be viewed in the usual way as stereo images, but they also can be reprocessed much like plenoptic images.<\/p>\n<\/div>\n<p><!-- .asset-content --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The point spread function (PSF) of a lens describes the impulse response of that lens \u2013 how a point light source is imaged. It is commonly assumed that an out-of-focus (OOF) point&#8217;s image will be blurred, but that is not what happens. This talk describes some of the things we have learned by studying the [&hellip;]<\/p>\n","protected":false},"featured_media":196511,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr_hide_image_in_river":0,"footnotes":""},"research-area":[],"msr-video-type":[206954],"msr-locale":[268875],"msr-post-option":[],"msr-session-type":[],"msr-impact-theme":[],"msr-pillar":[],"msr-episode":[],"msr-research-theme":[],"class_list":["post-187063","msr-video","type-msr-video","status-publish","has-post-thumbnail","hentry","msr-video-type-microsoft-research-talks","msr-locale-en_us"],"msr_download_urls":"","msr_external_url":"https:\/\/youtu.be\/Aq9y_Uf8NjI","msr_secondary_video_url":"","msr_video_file":"","_links":{"self":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-video\/187063","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-video"}],"about":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/types\/msr-video"}],"version-history":[{"count":0,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-video\/187063\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/media\/196511"}],"wp:attachment":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/media?parent=187063"}],"wp:term":[{"taxonomy":"msr-research-area","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/research-area?post=187063"},{"taxonomy":"msr-video-type","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-video-type?post=187063"},{"taxonomy":"msr-locale","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-locale?post=187063"},{"taxonomy":"msr-post-option","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-post-option?post=187063"},{"taxonomy":"msr-session-type","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-session-type?post=187063"},{"taxonomy":"msr-impact-theme","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-impact-theme?post=187063"},{"taxonomy":"msr-pillar","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-pillar?post=187063"},{"taxonomy":"msr-episode","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-episode?post=187063"},{"taxonomy":"msr-research-theme","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-research-theme?post=187063"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}