Popular Post Sage Posted November 26, 2019 Popular Post Share Posted November 26, 2019 "Pocket 4K footage is precisely transformed to match the color science of the Arri Alexa, without compromise. This is achieved without artifacts, while introducing a smooth, organic rolloff." For the better part of the last year, I've been working to map the color of P4K BMDFilm to match my Alexa's LogC, as measured under sunlight and halogen. To do this, I wrote an interpolation program in C++ that can accept an enormous amount of data (~40k samples per camera), and interpolate smooth internal contours, or 'waves' between them. Exposure compensation conversions were made with the same interpolation engine (transforms replicating sensor color response with variant exposure). Another significant element of the project was to recreate Arri's Rec709 to maintain the entirety of recorded LogC gamut, in a film-derived envelope (for the display variations). This was particularly difficult, as the correct RGB primary behavior needed to be exactly replicated within contiguous 709, but smoothly diverge to HDR-like handling of far gamut (where Arri's Rec709 ends). This new envelope (EC Gen.4) is particularly impressive, and I may release it for the Arri, as it is significantly preferable to normal Arri Rec709. P4Ka PDF Emotive Color austinchimp, BTM_Pix, Emanuel and 13 others 7 9 Link to comment Share on other sites More sharing options...
Shell64 Posted November 26, 2019 Share Posted November 26, 2019 Bro you got it to match perfectly. They look the same! If I ever get this camera I’m picking up this out for sure! Thanks a lot for these awesome LUTs. Sage 1 Link to comment Share on other sites More sharing options...
Sage Posted November 26, 2019 Author Share Posted November 26, 2019 2 minutes ago, Shell64 said: Bro you got it to match perfectly. They look the same! If I ever get this camera I’m picking up this out for sure! Thanks a lot for these awesome LUTs. Thanks so much Shell! Gen.4 is on a new level, and GHa really needs it. I intend to bring Gen.4 to GHa very soon Shell64 and deezid 2 Link to comment Share on other sites More sharing options...
Shell64 Posted November 26, 2019 Share Posted November 26, 2019 I currently shoot with a Panasonic g7. Any plans to make one of these for the Panasonic cameras with Cinelike D like the g7/g85? IronFilm 1 Link to comment Share on other sites More sharing options...
Sage Posted November 26, 2019 Author Share Posted November 26, 2019 21 minutes ago, Shell64 said: I currently shoot with a Panasonic g7. Any plans to make one of these for the Panasonic cameras with Cinelike D like the g7/g85? The G9 just received 10 bit - I wonder if they will update the G7? Currently, Cine-D is supported via a Pre to convert to VLog - Cine-D PRE deezid 1 Link to comment Share on other sites More sharing options...
majoraxis Posted November 26, 2019 Share Posted November 26, 2019 @Sage Incredible job! I actually like the Pocket 4K version better, though they are very, very, very, close. Congratulations - this is quite an accomplishment! Sage 1 Link to comment Share on other sites More sharing options...
Sage Posted November 26, 2019 Author Share Posted November 26, 2019 13 minutes ago, majoraxis said: @Sage Incredible job! I actually like the Pocket 4K version better, though they are very, very, very, close. Congratulations - this is quite an accomplishment! Thanks so much Majoraxis! Its been quite a journey Link to comment Share on other sites More sharing options...
crevice Posted November 26, 2019 Share Posted November 26, 2019 I was thinking of picking up a pocket 4k again, just because they are dropping in price in the used market. This may push me over the edge. I know you spent a lot of time and effort on this, nice work! In your opinion do you think the pocket 6k image quality and color science is better or worse than the pocket 4k? I noticed a difference between the two when I had them. Sage 1 Link to comment Share on other sites More sharing options...
Sage Posted November 26, 2019 Author Share Posted November 26, 2019 4 hours ago, crevice said: I was thinking of picking up a pocket 4k again, just because they are dropping in price in the used market. This may push me over the edge. I know you spent a lot of time and effort on this, nice work! In your opinion do you think the pocket 6k image quality and color science is better or worse than the pocket 4k? I noticed a difference between the two when I had them. Thank you - the P6K is better in terms of image quality and color science. Though using P4Ka on both, the P4K is better (I plan to support the P6K directly) deezid and majoraxis 2 Link to comment Share on other sites More sharing options...
Shell64 Posted November 26, 2019 Share Posted November 26, 2019 9 hours ago, Sage said: The G9 just received 10 bit - I wonder if they will update the G7? Currently, Cine-D is supported via a Pre to convert to VLog - Cine-D PRE Cool. Would the g7 be converted accurately then? It’s only 8 bit and has color differences vs the g9 and gh5 Link to comment Share on other sites More sharing options...
Sage Posted November 26, 2019 Author Share Posted November 26, 2019 Just now, Shell64 said: Cool. Would the g7 be converted accurately then? It’s only 8 bit and has color differences vs the g9 and gh5 Not accurately, though it'll work decently well. 8 bit is going to limit codec flexibilty (to avoid banding), but Cine-D is much more preferable in this scenario than VLog (maximize bit depth allocated to most important contrast regions) Link to comment Share on other sites More sharing options...
Shell64 Posted November 26, 2019 Share Posted November 26, 2019 Can I send you some footage, then you can apply the lut and see how it looks? Link to comment Share on other sites More sharing options...
Sage Posted November 26, 2019 Author Share Posted November 26, 2019 Just now, Shell64 said: Can I send you some footage, then you can apply the lut and see how it looks? Sure, take non-jpg stills, my email is emotivecolor@gmail.com Link to comment Share on other sites More sharing options...
Shell64 Posted November 26, 2019 Share Posted November 26, 2019 Do you want them in RAW, or stills from MP4 4K? Link to comment Share on other sites More sharing options...
Sage Posted November 26, 2019 Author Share Posted November 26, 2019 1 minute ago, Shell64 said: Do you want them in RAW, or stills from MP4 4K? From the Mp4 Link to comment Share on other sites More sharing options...
Attila Bakos Posted November 26, 2019 Share Posted November 26, 2019 Oh I'd like to send a still as well! It's an 512x512 PNG and it has 262144 unique colors, is that a problem? I'll show myself out... ? EthanAlexander and Sage 1 1 Link to comment Share on other sites More sharing options...
Sage Posted November 26, 2019 Author Share Posted November 26, 2019 12 minutes ago, Attila Bakos said: Oh I'd like to send a still as well! It's an 512x512 PNG and it has 262144 unique colors, is that a problem? I'll show myself out... ? Hey Attila, the res might be a bit low Attila Bakos 1 Link to comment Share on other sites More sharing options...
Attila Bakos Posted November 26, 2019 Share Posted November 26, 2019 7 minutes ago, Sage said: Hey Attila, the res might be a bit low Well, it's certainly enough to steal a size 64 LUT Or do you use higher resolution? Link to comment Share on other sites More sharing options...
Sage Posted November 26, 2019 Author Share Posted November 26, 2019 Its 65x, spread out over a bit of HDR region (to support Highlight Recovery mode) Link to comment Share on other sites More sharing options...
Video Hummus Posted November 26, 2019 Share Posted November 26, 2019 Hopefully we will see a Gen.4 for GH5S. Great work these look incredibly similar. Sage 1 Link to comment Share on other sites More sharing options...
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