先看降噪前後對比
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1. 什麼是AI DENOISER
AI DENOISER
Although the Octane version 4 comes with many innovations, the most exciting of these innovations is no doubt the "Spectral AI Denoiser". AI Denoiser, a by-product of Machine Deep Learning, which has been researched and developed for years, seems to be taking us to the future already. No longer need to think of for long rendering times and plenty of noise. This new technology, which is the result of the "Big Data" era, is now ready to use and has begun to show itself in the latest products as in Octane. Since AI Denoiser or its broader definition "Deep Machine Learning" is a very complicated subject, our recommendation is to read the resources on the Internet and get an idea.
技師翻譯：OC4.0有很多更新，其中【智能降噪】最騷氣，快來買！
The use of AI Denoiser in Octane is not as difficult and complicated as it is thought, and the results are quite amazing. Although there are many products used in the market as Denoiser, we should not to confuse "Spectral AI Denoiser" with classical denoisers. In case of Deep Learning, the background algorithm works far beyond the classical linear algorithm. AI Denoisers are trained with "Large Data Sets" and if the result is "expected" it is assumed to be true. So the AI is learning. The information we have accumulated throughout history is now classified as "Big Data" and finally we have reached the stage of teaching machines of this "Big Data" by using our fast computer technology. This the revolutionary side of this subject. Now an AI can now recognize tables, chairs or other objects in a picture and separate them from each other because of the "Large Data Sets Training". AI works on this logic in Denoisers. They are no longer blind and know what part is dark or bright. This is the future. Let's put aside whether this is going to be good or bad, and how to use AI Denoiser.
技師翻譯：智能降噪強大又好用，以後還會更高級。騷年激動不激動？興奮不興奮？要不要來買？
2. 在哪裡打開AI DENOISER。
有兩個地方可以開啟。第一處是在渲染設置裡面，如下圖。
第二處是在攝像機標籤裡，如下圖。注意：需要找到小三（點開摺疊小三角）
提示：兩處在哪打開都是一樣的，如果在攝像機標籤打開，渲染設置裡的就失效。一般我喜歡在渲染設置裡調節。
勾選上 Enable denoising後再進行渲染，如下圖。點擊DeMain，圖片渲染完成後會自動降噪。（此時可把渲染採樣調節低一些，比如87，方便快速觀察效果）
Main：原圖 DeMain：降噪後的圖
3. AI DENOISER參數解析：
Enable denoising：開啟。
Denoise volumes：體積降噪，有體積霧，體積光時開啟。
Denoise on completion：在渲染完成後再進行降噪。
MIN. DenoIser samples：最小降噪採樣，通常默認。
DenoIser Interval：降噪間隔，明暗對比較大的畫面可以減小該值。
Blend：降噪前後混合。
提示：一般只要開啟即可，其它無需調節。
4. AI DENOISER渲染輸出
如果現在渲染到圖片查看器中，會發現依然是沒有降噪的效果。
需要在渲染設置裡勾選下圖選項：
此時渲染，就是降噪後的效果了。
如果你需要渲染多通道，你要按需勾選上多通道相關選項。
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