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bilale36626875
Participant
April 20, 2017
Answered

Infinite White Background Help

  • April 20, 2017
  • 3 replies
  • 3820 views

Hi there everybody,

I was trying to achieve an infinite white background in my videos but I couldn't due to the unavailability of proper lighting, so I captured the video using a creamy colour background (my room's wall). Is there a way to colour grade that creamy background to white without affecting the foreground.

If you have any solutions or suggestions please post them below, that would be appreciated.

Bill,

Thanks

This topic has been closed for replies.
Correct answer Roei Tzoref

it all depends what you see. if you can show a frame, it would help to examine the proper workflow. this could be little or much work, or simply advice to reshoot.

  • for brightness: a curves adjustment could work to some degree by isolating the tone levels with proper re-adjustment of the curve. for color: maybe a hue/saturation effect could work if the colors are different between foreground and back. you could tone down the yellows and see where that gets you.
  • if there is enough differences in brightness and color between you and the background, a secondary color correction based on luma or chroma changes could work. lumetri effect has a tool for that as of CC2015.3
  • a high contrast key could remove the background if there is a big difference in contrast with the foreground (like with the extract effect). you could then replace it with a white background. maybe a combination of extract with decent softness and a cg background.
  • maybe a garbage mask with a generous amount of feathering could alleviate some of the problem, or only after it is combined with other techniques suggested here.
  • other than that you could try using rotobrush. it's a semi-auto rotoscoping tool. it does require experience to not work more than you need to. if this a long duration of a shot, this could mean a lot of work.

3 replies

Warren Heaton
Community Expert
Warren HeatonCommunity Expert
Community Expert
April 21, 2017

You might be able to use the footage as its own luma matte to isolate the foreground from the background.

    stefan_gru
    stefan_gru
    Inspiring
    April 20, 2017

    Bilal: Try changing what's called HSL Secondaries: Change or correct a specific color |

    This tutorial has sample files you can practice with. The idea is that you identify a specific color (hue, saturation, luminescence) and then change only that color. You could then blow that color out to white so it appears to be infinite.

      B
      bilale36626875Author
      Participant
      April 22, 2017

      This can be considered as a correct answer as well!!! Thank you for your help Stefan

      stefan_gru
      stefan_gru
      Inspiring
      April 22, 2017

      Great to know. Let us know which answer works for you!

      Roei Tzoref
      Roei Tzoref
      Legend
      April 20, 2017

      what's in the video other than the wall? show us

      B
      bilale36626875Author
      Participant
      April 20, 2017

      It will be me explaining something.

      kirkeric
      kirkeric
      Inspiring
      April 20, 2017

      The most likely and easiest is going to be to color grade/brighten the shot, however you could be at risk of blowing out other things in the process.  Brightening it will lighten everything.

      Now, there is a thought that occurs to me that may also help, depending on whether overall color is important, you could probably apply a tint, which will basically make it black and white.  That would probably make the wall white, along with a curves or brighten/contrast adjustment.

      Then begin bringing some of the color back in using the tint settings (0-100%) and see if anything in that range gets it there.

      ROTO would be a last resort and could be a mess depending on what's going on in the video.

      Eric

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