
Attila Bakos
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http://colorizer.net/
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Isn't Color Chrome for images only? I don't see how I could enable that for video on my X-T3. My feeling is that the processing is there to hide something, not to enable something.
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tupp reacted to a post in a topic: Color detail issues in Fujifilm video files
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Attila Bakos reacted to a post in a topic: Color detail issues in Fujifilm video files
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@tupp nice analysis, I really have to take a look at Darktable again sometime 🙂
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tupp reacted to a post in a topic: Color detail issues in Fujifilm video files
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tupp reacted to a post in a topic: Color detail issues in Fujifilm video files
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Django reacted to a post in a topic: Color detail issues in Fujifilm video files
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Not at all! Do you plan to include info from the Petapixel article as well, or link that article? With the information there my video makes more sense.
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Attila Bakos reacted to a post in a topic: Color detail issues in Fujifilm video files
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kye reacted to a post in a topic: Color detail issues in Fujifilm video files
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kye reacted to a post in a topic: Color detail issues in Fujifilm video files
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Great... I'd rather have an OLPF and slightly less overall resolution than slightly more luma and noticeably less chroma. Or at least they could allow us to modify/switch off the chroma NR.
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Unfortunately I won't have the time to test this anytime soon, and I'm not sure it's worth it. The Petapixel artice is absolutely correct about the interpolation issues of the X-Trans pattern, technically there is more guesswork there, and the camera won't have the processing power for a sophisticated demosaicing algo. It's pretty slow even on PC. So I'm sure that the in-camera demosaicing leaves some color artifacts that Fujifilm chose to hide with chroma NR, but they might have gone overkill with that. And I'm surprised that I don't see an improvement on the GFX bodies.
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I have access to an X-T3, EOS R, and 5D3. The GFX samples I found online. Did you mean to test with the X-T3?
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kye reacted to a post in a topic: Color detail issues in Fujifilm video files
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A last sample, this is from the GFX100s, 4K, 400Mbps, 8bit H.264. It's not F-Log, possibly Provia, so it's chroma channels are supposed to be slightly better compared to F-Log: https://drive.google.com/file/d/1F4W_DYYkYlQIV49lakIGuz1L4xnB3oNm/view?usp=sharing From top to bottom: Original, Cb (with added contrast), Cr (with added contrast) I post this because there are some trees in the background. The theory about this being an X-Trans only issue sounds fine, I might even believe it, but then all the clips that I found from GFX bodies so far tell a different story.
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If it's the X-Trans CFA, what's the explanation for the GFX results I posted earlier?
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I used ffmpeg first to extract the chroma channels into grayscale videos and I used that to validate the results of my plugin. They were identical so it's safe to say that it's not an NLE/GPU decoder issue.
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Andrew Reid reacted to a post in a topic: Color detail issues in Fujifilm video files
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Another samples, this time from the GFX100, keep in mind that this is 8bit: https://drive.google.com/file/d/1fyCiDFhbkskhjxz2miFgLXn523uP80ns/view?usp=sharing Sequence is the same as before: original, Y, Cb (with added contrast), Cr (with added contrast) This might be the worst I've seen so far.
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BrunoCH reacted to a post in a topic: Color detail issues in Fujifilm video files
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I don't know guys... just found two GFX100s F-Log clips here (200Mbps 10bit HEVC): https://drive.google.com/drive/folders/1UpKhgQpv8D6pEICjEBvLuAaSTSEvQaHX And here is the result (download please): https://drive.google.com/file/d/1vjFxXTTaqftD8E8GN1vrT5ZTPkaUb6Nq/view?usp=sharing The sequence is the following: original, Y, Cb (with added contrast), Cr (with added contrast) Would be nice to see something more colorful, but I already don't know how this is any better from what we have seen from the X-T3 so far.
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Alright, we agree then 🙂 Now I would LOVE to see an F-Log sample coming from a GFX body.
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But this proves my point. It's the chroma NR. The reason they apply it might be related to X-Trans but that's all, X-Trans alone won't cause what you see in my video. Easy to prove, I might do it later when I get home.
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I believe this has nothing to do with demosaicing, all the color information that's missing from the videos/jpegs are there in the x-trans raw files. I can show it tomorrow if necessary. Edit: looking at Django's comment it's necessary 🙂
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kye reacted to a post in a topic: Color detail issues in Fujifilm video files
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People like to mention smooth skin tones when it comes to Fuji JPEGs. I prefer to have all the details and do my own smoothing, but for many people this phenomenon is actually a plus 🙂 I was searching online a lot after I discovered this, I couldn't believe that no one is talking about this. I think I only found one old topic from dpreview where someone mentioned chroma smoothing happening in Fuji JPEGs, but I can't find it now. So we are quite alone here 😄