{"id":9227,"date":"2017-08-09T08:04:13","date_gmt":"2017-08-09T12:04:13","guid":{"rendered":"http:\/\/phsc.ca\/camera\/?p=9227"},"modified":"2017-08-07T02:38:28","modified_gmt":"2017-08-07T06:38:28","slug":"innovation-and-computational-zoom","status":"publish","type":"post","link":"https:\/\/phsc.ca\/camera\/innovation-and-computational-zoom\/","title":{"rendered":"Innovation and computational zoom"},"content":{"rendered":"
\"\"<\/a>

Effect of computational zoom (via software) on an image (UCSB)<\/p><\/div>\n

Toronto.\u00a0<\/strong>My thanks to my good friend Russ Forfar for bringing PetaPixel’s report on computational zoom<\/a> to my attention. First we could correct colour balance, exposure, and contrast in an image.<\/p>\n

A zoom lens lets us fill the frame with only meaningful elements of the scene. Note that prime lenses do the same thing with a bit of walking back and forth… By using \u00a0software to combine image elements from various focal lengths we can shift a new aspect of a scene making final images that are impossible to capture with the cameras \u00a0of today.<\/p>\n

Photographers know that variations in focal length from extreme wide angle to telephoto affect the look of people and backgrounds. The extreme close-up lenses make noses look too big and faces “stretched” front to back. Telephotos flatten a face making the nose appear too small and features pushed into the face.<\/p>\n

On the other hand, a wide angle allows more background to be visible while a telephoto crops and enlarges the background.\u00a0A so called normal lens makes facial features look much like they do to the unaided eye. A medium telephoto lets us capture a half or 3\/4 body shot with normal appearing features.<\/p>\n

Now scientists at UCSB (University of California at Santa Barbara<\/a>) have used software to combine a mix of wide angle and telephoto images of the same scene to be selectively used so the foreground for example can be selected from a medium zoom to appear “normal” to the eye while a wide angle shot of the background can \u00a0be combined to expand the view, or a telephoto shot to magnify and crop the background.<\/p>\n","protected":false},"excerpt":{"rendered":"

Toronto.\u00a0My thanks to my good friend Russ Forfar for bringing PetaPixel’s report on computational zoom to my attention. First we could correct colour balance, exposure, and contrast in an image. A zoom lens lets us fill the frame with only … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[1341,1343,267,1342],"class_list":["post-9227","post","type-post","status-publish","format-standard","hentry","category-processes","tag-computational-zoom","tag-innvation","tag-software","tag-ucsb"],"_links":{"self":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/9227","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/comments?post=9227"}],"version-history":[{"count":3,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/9227\/revisions"}],"predecessor-version":[{"id":9232,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/posts\/9227\/revisions\/9232"}],"wp:attachment":[{"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/media?parent=9227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/categories?post=9227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phsc.ca\/camera\/wp-json\/wp\/v2\/tags?post=9227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}