fsorvin Autochrome LUTs

該 LUT 集模擬了 Lumière 兄弟美麗的 Autochrome 早期彩色膠片工藝。 Autochrome 于 1907 年投入生產，是一種加色彩色攝影技術，后來又嘗試了電影處理技術，它使用彩色馬鈴薯淀粉粒鑲嵌在單色玻璃板乳劑上，對記錄的圖像進行過濾和著色。

Autochrome 并不常見印刷（除非轉移用于批量印刷，如《國家地理》），但更常見的是在立體鏡或透光鏡中觀看，透光鏡是一個使用日光、鏡子和擴散板來照亮相機原始板的盒子。 在后面。

Autochrome 的馬賽克染色紅橙色、綠色和藍紫色的馬鈴薯淀粉顆粒非常小，以至于看不見，但混合在一起形成了顏色的印象，就像現在的 RGB 顯示器一樣。 可以看到彩色馬賽克上顆粒不精確分布形成的團塊。 該 LUT 無法模擬聚集。 如果您想對其進行模擬，請在圖像鏈中的 LUT 之前添加噪聲層。

橙紅色、綠色和紫藍色可以產生一些非常美麗的膚色，以及一些有趣的風景。 如果您喜歡的話，可以調高鮮艷度或飽和度以獲得夢幻般的色彩，也可以調低一切以獲得復古褪色的外觀。 如果您確實想要真實，請使用較長的曝光時間進行拍攝。 Autochrome 在日光下的曝光時間為 3 到 4 秒，因此請讓拍攝對象擺好姿勢并帶上三腳架。

Autochrome 往往會發生藍移，因此 Lumiere 建議在鏡頭前使用黃色濾鏡。 此 LUT 包中包含一組預過濾的 LUT，設置為 10% 到 40% 黃色，以及一個未過濾的 LUT，您可以在自己的黃色過濾器中撥動。 只需使用黃色純色圖層，色相：59，亮度 100%，飽和度從 0 到 100%。 將圖層疊加到原來的圖層上，就可以開始了。

這個和我的其他 LUT 可以被視為顏色轉換過程。 它們的設計并不是考慮到特定的攝像機，也不是為了轉換日志編碼的鏡頭。 他們以數字方式應用顏色和密度在 Autochrome 過程中經歷的顏色轉換過程。

使用您最喜歡的 LUT 實用程序應用 LUT。 作為 3D 32 位 LUT 提供，因此它適用于所有 LUT 情況，例如 Premiere、After Effects、Photoshop、顯示器甚至 iPhone/Android 應用程序。

This LUT set simulates the Lumière brothers beautiful Autochrome early colour film process. Put into production in 1907, Autochrome was an additive colour photographic and later attempted motion picture process that used a mosaic of coloured potato starch grains layered over monochromatic glass plate emulsion to both filter and colour the recorded image.

Autochromes were not commonly printed (unless transferred for mass printing, like in National Geographic), but were more commonly viewed in a stereoscope or with a diascope, a box that used daylight, a mirror and a diffusion plate to illuminate the camera original plate from behind.

Autochrome's mosaic, dyed potato starch grains of red-orange, green and blue-violet, were so small as to be invisible but blended together to form the impression of colour, much like an RGB display does now. Visible were the clumps formed by the imprecise spread of grains on the colour mosaic. This LUT cannot simulate the clumping. If you want to simulatate it, add in a noise layer before the LUT in your image chain.

The orange-red, green and violet-blue can produce some seriously beautiful skin tones, as well as some interesting landscapes. Dial up the vividness or saturation for the colour of dreams, or dial it all back for a vintage faded look, if that's your thing. And if it's really your thing to be authentic, shoot with long exposure times. Autochrome had exposures of 3 to 4 seconds in daylight, so get your subjects to pose and bring your tripod.

Autochromes tended to be blue shifted, so Lumiere recommended a yellow filter be used in front of the lens. Included in this LUT pack is a set of pre-filtered LUTs, set from 10% to 40% yellow, as well as an unfiltered LUT that you can dial in your own yellow filter. Just use a Yellow solid layer at Hue: 59, Brightness 100% and play with Saturation from 0 to 100%. Multiply the layer over your original and you should be good to go.

This and my other LUTs can be though of as colour transformation processes. They aren't designed with specific cameras in mind, or to transform log-encoded footage. They digitally apply the colour transform process that colour and density would go through in a Autochrome process.

Apply the LUTs using your favourite LUT utility. Comes as a 3D 32-bit LUT, so it works in all LUT situations like Premiere, After Effects, Photoshop, monitors and even iPhone/Android apps.