Latest post Sun, Nov 10 2013 10:33 PM by cineblue. 10 replies.
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  • Thu, Nov 7 2013 4:30 PM

    • cineblue
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    Using the McBeth color chart for color grading.

    So I started browsing the web looking for ways in which film makers have used the McBeth chart for video color grading.  I couldn’t find any.  Now I’ll be the first to acknowledge that a DSC Labs chart is the way to go, but I’ve been curious to find out if it can be done with the McBeth chart.  I came upon a solution that I think works pretty well so I created a tutorial.  Enjoy!!

     

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  • Thu, Nov 7 2013 4:50 PM In reply to

    • Adman
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    • BlogAuthor
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    Re: Using the McBeth color chart for color grading.

    Thanks... shared on facebook. :)

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  • Thu, Nov 7 2013 5:53 PM In reply to

    • cineblue
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    Re: Using the McBeth color chart for color grading.

    Thanks! :)

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  • Thu, Nov 7 2013 9:18 PM In reply to

    • drbgaijin
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    Re: Using the McBeth color chart for color grading.

    That was a really interesting and well done tutorial.
    I have been lucky when shooting video and never really found I needed colour grading - believe it or not.

    Your tutorial explained a lot that will be of great use to me when I do find I need to start.

    Thank you for that effort. Yes

    Regards

    Douglas

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  • Fri, Nov 8 2013 2:16 AM In reply to

    • dmfreeman
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    Re: Using the McBeth color chart for color grading.

    I very much enjoyed the tutorial, but have a question.  Does your method pre suppose that you need to include the color chart in each series of clips so that the lighting effects the subject and the chart at the same time?  How would you use your technique without the chart included in the video clip?

    Thanks,
    Denny

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  • Fri, Nov 8 2013 8:20 AM In reply to

    Re: Using the McBeth color chart for color grading.

    What you can do is look for objects in the image that should naturally be close to pure white and pure black. For example, the wall in the b.g. should most likely be pure white, so use that instead of the white chip on the chart.

    Thanks a lot Marco!

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  • Fri, Nov 8 2013 3:05 PM In reply to

    • dmfreeman
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    Re: Using the McBeth color chart for color grading.

    If you look at the first frame of his post, the white on the card is no where near the white on the wall.  The wall appears to be an off white or pale yellow, and they are illuminated the same.

    Denny

    Media Composer 8.5.4, BCC 10.0.0074, AvidDVD 6.4.4, Boris Red 5.5.2.1382, Asus P9X79 Pro Motherboard with Intel 3930K Processor. 32 gigs DDR3 ram, Windows... [view my complete system specs]
  • Fri, Nov 8 2013 3:57 PM In reply to

    Re: Using the McBeth color chart for color grading.

    Well, that's not my fault, LOL! You have to work the best you can with what IS in the shot.

    Now if you are using the same setup, you don't need to shoot the card each time. You could just copy the grade you did for the shot that has the card in it.

    MC 8.2, AvidFX 6.4, BCC 8.2, Squeeze 8.1, QT 7.7.3, Nvidia driver 310.90, Window 7 Professional 64-bit SP1, IE9. Quadro 2000 and 600 videocards (three... [view my complete system specs]

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  • Sun, Nov 10 2013 1:49 PM In reply to

    • newstudy
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    Re: Using the McBeth color chart for color grading.

    I am a student in my first semester and just starting with MC7.  I hope this question isn't a stupid but why were your target values for white and black 200 and 40?  Shouldn't they in theroy be 255 and 0?

  • Sun, Nov 10 2013 7:30 PM In reply to

    Re: Using the McBeth color chart for color grading.

    It all depends on how bright you want white to be in the image and how dark you want the black to be. For exmaple, I'm looking around the room right now, and I don't see anything that is extremely bright white or extremely dark black.

    Also, realize that in the video world, black is 16 and white is 235. So depending on how your finished work is going to be delivered and displayed, everything below 16 and above 235 may get clipped.

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  • Sun, Nov 10 2013 10:33 PM In reply to

    • cineblue
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    Re: Using the McBeth color chart for color grading.

    Hello everyone!  First I'd like to say thank you for all the feedback!  I'll try to answer as many questions as I can :)

    Douglas, I sincerely appreciate your comments.  I’m a huge fan of your tutorials and it’s great to have your feedback!

    dmfreeman:  This method does suppose that the lighting is fairly constant through your series of clips.  Mostly as long as the light type doesn’t change (tungsten, HMI, LED, sunlight) then all you have worry about is exposure and contrast.  It’s best used in a multicam environment, but as long as there aren’t any major lighting changes between camera shots it should work quite well to get your colors looking good. 

    newstudy: The reason I went with 200 and 40 is because I’m trying to retain color information in shadows and highlights while grading to get the best possible readouts during my grading process.  If I went with the extremes 255 and 0 or 16 and 235 I may lose valuable color information during the grading process.  That’s why I adjusted my master (contrast) curve at the end.  

    I forgot to mention this is the video, but you can also take additional samples in one of the midtone grey patches for even more accurate grading.

     

    Good luck and thanks again for all the feedback!

     

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