Google Pixel 3的Night Sight - 手機討論

By Irma
at 2018-10-10T23:28
at 2018-10-10T23:28
Table of Contents
Pixel 3 and Pixel 3 XL feature enhanced computational features, dual
front-facing cameras
https://bit.ly/2RFLkWU
https://www.dpreview.com/news/8698385442/pixel-3-and-pixel-3-xl-feature-enhanced-computational-features-dual-front-facing-cameras
對岸 只針對Pixel3 新的算法的部份 簡單翻譯
https://m.weibo.cn/detail/4293691252370771
DPReview:谷歌Pixel3突破了計算成像的界限
Pixel 3的相機基本上不管你按不按快門它都在自己成像,並在用戶按快門的一瞬間自
動從緩存裡調取前15張照片,這意味著你不會有任何快門延遲。
這15張照片在自動對齊的同時會分析用戶自己的手抖和畫面上元素的移動,妥善處理一
切移動物體,最終堆棧成一張高信噪比的圖片。與此同時,谷歌的光學防抖在設計上就
會盡量讓畫面上的每個點被RGB三個通道各採樣至少一次,實現近乎於完美X3的手持搖
搖樂效果。
由於清晰度的大幅提升,Pixel 3哪怕是做2X裁切的效果也和傳統的2X光學變焦差不多。
Pixel 3生成的DNG直接就是堆棧後的結果,不需要用戶自己到Photoshop裡處理。從理論
上來說,15張RAW堆棧後的信噪比已經接近一台殘幅相機。
Pixel 3延續了二代的靠雙核對焦+AI分辨距離的功能,可以識別出人臉以便進行模擬虛
化和人造布光。除此以外,前置攝像頭的防抖會確保人臉在畫面上的位置始終不動,以
便拍攝VLOG,這是傳統防抖做不到的。
精神股東大護法:
不過這些都是紙面上很美,看了看Pixel 3的樣片,我覺得在座的各位手機,依然是…
其實相機相比手機主要有三大核心優勢:焦距,光圈,寬容度。
其中寬容度我一直說是最不值錢的,堆棧完破。
光圈提供虛化能力和弱光能力。虛化能力大家都見識過了,基本不是問題。弱光能力分
場景考慮,對於靜態目標(可以長時間曝光的),手機通過堆棧完全有能力解決;對於
動態目標,理論上完全無法解決,等效光圈大就是可以為所欲為。
焦距嗎手機在一定程度上(到此一遊)是可以滿足的,更長的焦距雖然理論上可行,但
實踐中很困難。
所以到最後相機面對完美手機基本就剩兩個優勢,第一是動態題材,第二是特殊焦距…
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Pixel2時代好像最多疊9張,這代可疊更多到15張,難怪夜間噪點有變少
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Tags:
手機
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