The One Lut - iPhone 15

iPhone 的問題

我們在 iPhone 上拍攝了幾個項目，但總覺得最終結果，即使在調色之后，看起來還是有點不自然。蘋果的標準 Rec709 外觀過于飽和，曲線咄咄逼人，膚色也很人造。 iPhone 拍攝的視頻有一種“油畫”的感覺。 而不是一個好辦法。

在 iPhone 15 Pro 發布之前，由于幕后發生的復雜算法圖像處理，蘋果的成像流程產生了不可預測的結果。這將覆蓋手動曝光并機會性地通過算法調整場景的局部區域。 這使得無法為 iPhone 實現真正準確的 Arri LUT。

解決方案。

iPhone 15 Pro Lut 克服了這些限制，這要歸功于 Apple Log 的實現，它完全繞過動態色調映射算法，每次都為我們提供一致且已知的伽瑪曲線。這是移動電影制作的游戲規則改變者。

現在所有變量都已刪除，我們可以準確地分析 iPhone 15 Pro 傳感器并創建與 Arri Alexa 的一致匹配。

我們將 iPhone 15 Pro 與 Arri Alexa 電影攝影機并排進行了現場測試，以創建一個與 Alexa 的色彩響應和令人愉悅的膚色相匹配的 LUT，并在任何照明條件下在 iPhone 上提供最具電影感的圖像。

我們對 LUT 進行了建模，以匹配 Arri 的官方 Alexa K1S1 Rec 709 LUT。 Arri 為他們的相機制作了一個 LUT，所以所見即所得。 我們對 iPhone 15 Pro/Pro Max 也做了同樣的事情。 你所看到的就是你得到的。

The problem with iPhones

We’ve shot several projects on the iPhone and always felt the end result, even after grading, looked a little unnatural.

Apple’s standard Rec709 look is too saturated, the curve is aggressive, and the skin tones are artificial. iPhone footage has an ‘oil painting’ look to it. And not in a good way.

Prior to the release of the iPhone 15 Pro, Apple’s imaging pipeline yielded unpredictable results due to the complex algorithmic image processing occuring behind the scenes. 

This would override manual exposure and opportunistically adjust locals areas of the scene algorithmically. This made it impossible to achieve a truly accurate Arri LUT for the iPhone.

The solution.

The iPhone 15 Pro series overcomes these limitations thanks to the implementation of Apple Log which bypasses the dynamic tone-mapping algorithm completely and gives us a consistent and known gamma curve, every time. 

This is a game-changer for mobile filmmaking.

Now that all variables have been removed, we can accurately profile the iPhone 15 Pro sensor and create a consistent match to the Arri Alexa. 

We tested the iPhone 15 Pro side by side with the Arri Alexa cinema camera and on location to create a LUT that matches the Alexa’s colour response and pleasing skin tones and delivers the most cinematic image possible on an iPhone, in any lighting condition.  

We’ve modelled our LUT to match Arri’s official Alexa K1S1 Rec 709 LUT. Arri made one LUT for their camera so what you see is what you get. We’ve done the same thing for the iPhone 15 Pro/Pro Max. What you see is what you get. 

No LUT packs for different conditions, no more oil paintings, just The One LUT.