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Sage

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Sage last won the day on October 23 2018

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  1. Sage

    GH5 to Alexa Conversion

    100% certain; I would call it the #1 camera. Expect something soon; that said, can you live without IBIS? I think I will keep both Stunning! Wouldn't have thought a G9 would look so good, like no G9 I've seen
  2. Sage

    GH5 to Alexa Conversion

    The part that I'm stuck on is how one would navigate a multi dimensional array from the pointer. For example, is there any way to do something like array * [3][14][7][12]? Someday, I want to learn Python. I've got to master c++ first though. I just bought Stroustrup's Tour of c++ book
  3. Sage

    GH5 to Alexa Conversion

    For the c++, there is a problem I'm trying to solve. Giant 4D arrays aren't supposed to be declared on the stack like this, but I haven't figured out how to conveniently pass them to functions any other way yet (vector pointer 'arrays' can only be 2D etc)
  4. Sage

    GH5 to Alexa Conversion

    EC was made by filming a large number of color samples with both cameras, and then extracting coordinate data from those samples and supplying that data to a my own c++ program. As channel clipping occurs, the program attempts to straighten hue lines to follow that of the higher DR camera. There is a point at which those hue lines merge during clipping, such that clipped red is identical to yellow, for example. When these regions are detected, they are reduced to near grayscale data:
  5. Sage

    GH5 to Alexa Conversion

    They look great. Could you share the original HLG still of this one?
  6. Sage

    GH5 to Alexa Conversion

    Hey guys, just wrapped up the shoot I was on. For HLG + Resolve, keep the settings at default. The Pre is the CST, and is preferable as it is measured. One would either use CST/Color Management, or the PRE.
  7. Sage

    GH5 to Alexa Conversion

    Thank you for the kind words! It may be a minute, so be sure to hang on to your 5 for the time being. When a new camera is supported, it must be absolutely, sans compromise (on par with the 5)
  8. Sage

    GH5 to Alexa Conversion

    There are several variables that combine in skintone; color separation, saturation model, skin color, light color spectrum, white balance, lens coloration. Color Separation: Good cameras have color separation. Less ideal color science will have 'accordioned' hues, compressing and expanding arbitrarily throughout the hue circle. For skintone - under quality light, the Alexa will have great separation between the pink aspects of the face (lips, blush) and skintone, which rides the line between too green and too magenta under flat spectrum light Saturation Model: Photometric saturation models (like Alexa LogC+R709 or EC LogC+R709) have less saturation (the video model). Saturation amplifies hue difference, and photometric models can make skin tones seem more alike. The EC variations emphasize saturation (film backend), which foregrounds skin hue Skin Color: The skin of the talent may be slightly more olive (dark and yellow in hue) or pale with pink as the primary hue accent (all vary towards magenta with emotion). Here is a recent still from the film I've been shooting, with two people in the same frame that had divergent skin hues: Light Color Spectrum: On the Alexa (and cameras generally), filming under light that has a spikey color spectum (Leds, Flos, Sodium Vapor, etc.) can cast skintone distinctly to green or magenta, even with correct - White Balance: A fully neutral WB is vital for EC, not only in skintone, but the whole of color space accuracy. Skintone is one of the reliable indicators that WB might be off on the green/magenta axis when under reference light without a white card reference (should anchor on the skintone line of the Vectorscope under sunlight and halogen). A common occurrence is that WB will be set for direct sun on the GH5 (possibly with the WB sun preset), and then the shoot will move into the shade, which will shift the WB towards blue/magenta (needs a new WB, or correction in post ahead of the conversion) Lens Coloration: Interrelated with WB is lens coloration, which is like a WB that variably shifts throughout the grayscale [For EC: it is optimal to WB around middle gray, or a little brighter for the most salient part of the image]. This can vary from minimal coloration (Sigma 18-35) to heavy coloration (for example, Xeens). For NDs - the reference EC ND is the Firecrest FSND, which evenly cuts the full spectrum (visible/invisible). Non FSNDs (even IRNDs) will have a varying ratio between IR/UV and visible, which can unpredictably shift sensor response to a given light (interacting with the camera sensor's native cut). Variable IR ratio particularly acts on the green/magenta axis Notably, EC Tungsten does have a slight magenta bias in the skintone region towards magenta compared to the Alexa. I've figured out what in the data was causing this problem (IR leak every third exposure slice), and this will be solved for the next release.
  9. Sage

    GH5 to Alexa Conversion

    Ah very cool. Looking forward to it!
  10. Sage

    GH5 to Alexa Conversion

    Very cool, they will be very pleased. Do you have any work online? Jamy Hang just shared these, one still from his film, and the others from fashion:
  11. Sage

    GH5 to Alexa Conversion

    Stunning piece from Keith Hammond:
  12. Sage

    GH5 to Alexa Conversion

    Sure, glad I could help! That's unfortunate. @CaptainHook It really needs fixin I have an idea for an in-cam ProRes fix once in hand, but it depends on how things are implemented therein
  13. Sage

    GH5 to Alexa Conversion

    Hey Grimor, can you send me Dpx (with empty Lumetri applied) stills of your raw footage, and Jpgs of the final image? My email is emotivecolor (at) gmail (dot) com. No worries, no matter the non-Panasonic camera I support next, the S will be of equivalent priority and released simultaneously, or shortly thereafter. From what I've seen, the S is a touch warmer.
  14. Sage

    GH5 to Alexa Conversion

    Another factor is, everyone will have the reference NLE; that really appeals to me. Its hard to beat that luma curve + hue lock out workflow.
  15. Sage

    cinematic color?

    Not a bad way to go! The most appealing quality of Unreal was the photorealism; granted I was one to get a Gtx1080 at release to do a 4k downsample to CV1. Have you tried Dreadhalls? I remember that as being an algorithmically rendered dungeon (unique every time), and it was pretty scary.
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