Dead Space 2: Color Banding problem

Discussion in 'Videocards - NVIDIA GeForce' started by Noisiv, Jan 29, 2011.

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Do you notice any color rings in video(1080p) or screenie?

Poll closed Feb 28, 2011.
  1. No. Picture looks OK to me both in video and screenshot.

    6 vote(s)
    46.2%
  2. Yes. I notice color rings in video and screenshot.

    6 vote(s)
    46.2%
  3. Yes. I notice color rings in video.

    1 vote(s)
    7.7%
  4. Yes. I notice color rings in ss.

    0 vote(s)
    0.0%
  1. Noisiv

    Noisiv Ancient Guru

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    Can't believe so few ppl notice DS2 problem with color gradients.

    I am puzzled by what portion of this is caused by my P2370 LCD.

    How does this look to you guys?
    Watch at 1080p please and vote above please

    [​IMG]


    http://www.youtube.com/watch?v=jHkQ-QJ6ENU
     
    Last edited: Jan 29, 2011
  2. Pete J

    Pete J Master Guru

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    I take it you mean when you back away from the door and then go back to it, it then appears much darker?
     
  3. Noisiv

    Noisiv Ancient Guru

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    No. I am talking about uneven color gradient manifested in circular rings, but you have to watch it at 1080p to notice it.

    Screenie:

    [​IMG]

    Dunno, maybe all of it is my bloody Samsung.

    Pete J, what monitor are u using?
     
    Last edited: Jan 29, 2011
  4. Glidefan

    Glidefan Don Booze Staff Member

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    If its captured by fraps then its not your monitor, but the game itself.
    Probably just imperfections in the lighting calculation.
    Its not just in this game.
     

  5. Noisiv

    Noisiv Ancient Guru

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    Thanks Glidefan.
    And I see what you mean,
    but the image we are seeing IS in the end displayed at monitor.

    I am also aware of color banding issues across the different LCD's.
    So it's not easy to say for this particular case who's quilty. LCD, Dead Space 2, or BOTH.

    That's why POLL
    [​IMG]
     
  6. Zboe

    Zboe Master Guru

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    TN panel LCD monitors cannot display all the colors produced by the video card. The color banding you see is a result of interpolated 24 bit color. It's called dithering and it's when they use multiple pixels that are next to each other to produce the desired color shade on screen. The effect is most notable with darker tones.
     
  7. Noisiv

    Noisiv Ancient Guru

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    Thanks for educated info. Good input right there.

    A vote and monitor model would also be nice... if that's not 2 much invading of privacy :D
     
  8. Pete J

    Pete J Master Guru

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    Ahh, I got you, I can see the bands in the video. I'll watch out for it next time I play.

    My monitor's a Dell 3007WFP-HC.
     
  9. Zboe

    Zboe Master Guru

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    Yeah, I see it in both as I have a TN monitor as well. HP w2007
    I hate it in flight simulator because it makes the sky at night look terrible.
     
  10. Noisiv

    Noisiv Ancient Guru

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    I knew when I was buying my Samsung P2370 that it has flaws, and that I'll miss some of my old CRT's features.

    I didn't expect 24 bit color reproduction to be one of them.

    Gonna try to tune, make custom color profile, and see if that helps.
     

  11. Glidefan

    Glidefan Don Booze Staff Member

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    Guys. Fraps is an application. It can only grab what is being written in the card's frame buffer.
    So of course that would be visible with a lot of monitors.
    Yes, TN panels do that dithering thing.
    However, since fraps got this screenshot, then it is coming from the game itself, not the monitor.
    Now, if you would have a clean screenshot but visible banding in a pic captured with a camera pointed at the screen, then someone can say that its the monitor.
    If you get the best IPS monitor, i'm sure you'll see the same thing, because that is what is being fed to the monitor.

    @zboe, the banding it because they can't show 24bit color. They show less.
    If they were to show 24bit (8bit red, 8bit green, 8 bit blue) then they would be fine. The extra 8 bits that add up to 32bit color is for the alpha channel (transparency)
    That has to do the card. TN panels that show banding usually display up to 18bit of color.
     
  12. Noisiv

    Noisiv Ancient Guru

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    Hmm...Not much I can do rly. Reduced contrast, brightness and RBG channels and although far from spectacular it's a bit better then before.

    Gray transitions is what's giving problems to my P2370.

    FFS what kind of dithering algorithm are they using to produce such a crappy result.

    I gotta a better idea then this BS dithering for cheap LCD manufacturers:

    Map an input colors range to whatever color range you can reproduce and don't gimme any false transitions, shades or whatever.

    In other words, don't even bother with what you can't reproduce, just map to nearest of what you can.
     
  13. Zboe

    Zboe Master Guru

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    *Most* TN panels give 6 bits per color not 8. This makes them 18 bit not 24. The banding comes from dithering to make them appear to have full 24 bit color.
     
  14. Noisiv

    Noisiv Ancient Guru

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    I am Googling how to tun off dithering :nerd:
     
  15. Zboe

    Zboe Master Guru

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    You do realize that you are agreeing with me right? Just a really 'round 'bout way of doing it...
     

  16. Zboe

    Zboe Master Guru

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    You can't, have to buy a better monitor.

    Just make sure you get a 8 bit per color monitor instead of a 6 bit per color monitor and you'll be fine.
     
  17. Noisiv

    Noisiv Ancient Guru

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    Yeah I don't rly get what u 2 are discussing, since I think we all get the picture.

    Or rather, we dont :D

    Yeah seems I can't turn it off. And btw buying non TN does not mean it will be able to reproduce 8*3 bit color
     
    Last edited: Jan 30, 2011
  18. Zboe

    Zboe Master Guru

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    Yeah, it's pretty easy but the vast majority of people just want bigger and bigger at cheaper and cheaper prices and the consequences be damned. A good 24 inch IPS monitor will set you back about $500 in comparison to a cheap 24 inch TN panel costing less than $200. This is a case of getting what you pay for.
     
  19. Noisiv

    Noisiv Ancient Guru

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    Well tbh I bought my 23'' for a bit less then 400$.

    And I am willing to bet that buying 1000$ 24'' will give me nothing to brag about.

    Maybe 3000$ monitor would do the trick.
     
  20. Pete J

    Pete J Master Guru

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    For what it's worth, I've just had a little play and can't notice any banding on my system.

    Edit: just in case it's important, I'm running the game at max settings as well as activating in the control panel:
    1) Vsync through drivers rather than the game.
    2) High quality texture filtering
    3) Triple buffereing
    4) Quality ambient occlusion Sorry, got confused with the first game
    5) 16xAF
     
    Last edited: Jan 30, 2011

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