Facebook推出3D照片功能大綱
Facebook first showed off its 3D photos back in 2018, and shared the technical details behind it a month later. But unless you had one of a handful of phones with dual cameras back then (when they weren’t so common), you couldn’t make your own. Today an update brings 3D photos to those of us still rocking a single camera.
2018年Facebook首次展示了3D照片，一個月之後又分享了產品的技術細節。但當時除非你有一部雙攝像頭的手機（那時這種手機還不多），否則你自己拍不出這種效果。現在更新後的技術讓我們只有單攝像頭手機的人也能拍出3D照片了。
In case you don’t remember or haven’t seen one lately, the 3D photos work by analyzing a 2D picture and slicing it into a ton of layers that move separately when you tilt the phone or scroll. I’m not a big fan of 3D anything, and I don’t even use Facebook, but the simple fact is this feature is pretty cool.
以防你忘了或者最近沒見過Facebook的3D照片，我可以告訴你，這種3D照片技術先要分析2D照片並把它切分成很多層，傾斜手機或滾動屏幕時各層可以獨立移動。我不是特別熱衷3D的東西，我甚至都不用Facebook，但我喜歡這個功能的原因很簡單，就是它太棒了。
The problem is it used the dual-camera feature to help the system determine distance, which informed how the picture should be sliced. That meant I, with my beautiful iPhone SE, was out of the running — along with about a billion other people who hadn’t bought into the dual-camera thing yet.
問題是以前要使用雙攝功能來幫助系統確定距離，這樣才能知道如何切分照片。這就意味着我和我美美的iPhone SE做不到，還有約十億人當時都沒有買雙攝手機。
But over the last few years the computer vision team over at Facebook has been working on making it possible to do this without dual-camera input. At last they succeeded, and this blog post explains, in terms technical enough that I’m not even going to attempt to summarize them here, just how they did it.
但在過去幾年裏，Facebook的計算機視覺團隊一直在研究如何不用雙攝像頭就能實現這一功能，最終他們成功了。這篇博文解釋了他們是如何做到的，技術層面的問題我就不打算在這裏總結了。
The advances mean that many — though not all — relatively modern single-camera phones should be able to use the feature. Google’s Pixel series is now supported, and single-camera iPhones from the 7 forward. The huge diversity of Android devices makes it hard to say which will and won’t be supported — it depends on a few things not usually listed on the spec sheet — but you’ll be able to tell once your Facebook app updates and you take a picture.
取得的進步意味着雖然並非所有手機，但是目前很多相對高級的單攝像頭手機應該都能使用這一功能了。谷歌Pixel系列現在支持這一功能，還有單攝像頭的iPhone 7及配置更高的手機都可以。安卓手機種類太多，很難說哪些安卓手機支持這一功能，這取決於一些通常沒有在產品規格中顯示的數據。但你只要更新一下手機中的Facebook應用，拍個照片就知道了。
