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color cast and contrast

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11 comments

  • Robert Cordes

    To add a little more to my post 

    - these are different images of the same type of jet (F-35) 



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  • Rick Sammartino Community moderator

    Be careful using the Haze adjustment, it will change the colours if you go too far. I suggest that you reset the haze slider until you get the colours balanced

    Have you tried the Gray dropper? Either in Tone & Color in Develop or Color Enhancer in Effects select the Gray dropper and click a Gray area on the photo. In the top photo there is a circle under the wing that might work. You can try clicking other Gray areas (reselecting the dropper each time) to see if they work better. Maybe try the plane itself since it's supposed to be gray.

    A description of the Gray Dropper is on page 104 of the user manual.

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  • Kevin Pinkerton

    I never knew about the gray dropper. Thanks Rick.

    But, I do know of one technique that has helped me bring the white balance back in line. I learned this one on a training video.

    This can be done in either the Color Enhancer filter in Effects, or the Tone & Color control in Develop. Look in the White Balance area for these sliders.

    1) Take the Saturation slider and move it ALL the way to the right (set it at 100). This is a temporary setting to help make it very obvious which way the Temperature and Tint sliders need go.

    2) move the Temperature and Tint sliders until you get as close to neutral as you can in the overall look of the photo. 

    3) once you are happy with Step 2, set the Saturation slider back to the middle (zero) by double clicking on the "Saturation" word, or moving the slider, or entering 0 in for the value.

     

     

     

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  • Rick Sammartino Community moderator

    Interesting technique Kevin. There are times when I can't find a good spot in my photo to use the dropper or sometimes the dropper goes whacky and totally messes up the photo and I have to undo it. This might come in handy.

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  • Robert Cordes

    Thanks for the suggestions. I will give them a try and post results.

     

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  • Robert Cordes

    I tried both of your tips but really did not get anywhere.

    I found some areas of the plane that the dropper tool showed the RGB to be within 5 of each other.

    I also tried increasing the temperature first to get rid of the blue cast on the plane then increase the purity slider before using the dropper. But it was not much better.

    Kevin, I tried your technique but I could not get back to neutral probably b/c I am not sure what you mean by "neutral".

     

     

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  • Rick Sammartino Community moderator

    Robert, there is no point in adjusting the temp first since the dropper is going to over-ride any adjustments you do.

    As I suggested, you should try the gray circle under the wing. You might have to zoom in to do that. I think the biggest problem with the photo is that it's too dark under the plane and you're going to have trouble getting proper colours out of it. Also, it might be better to do this in Color Enhancer in Effects if you're not already because you'll be able to see what adjustments the dropper makes. For me, On1 doesn't show that in develop.

    Is it ok to take the jpg from this page and try it myself?

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  • Robert Cordes

    I tried it again in Effects color enhancer and found an area under the lower wing where the RGB values were 83,83,86.

    Here is the result. I think much of the problem is the jet is backlight and there may have been smoke in the air messing with my focus.

    Rick, feel free to take the jpeg and try it yourself.

     

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  • Kevin Pinkerton

    Robert,

    "neutral" is determined by individually sliding the temp and tint sliders back and forth. On the temp slider going to the left makes everything blue, and to the right makes everything yellow. You work that slider until you find a mid point where the blue and yellow sort of become minimal. A mid point where the blue and yellow are equally there.

    The same applies to the tint. You work it from one side back to the other. The image goes from green to purple. You move that slider to where the midpoint is, or as best as you can tell. So that the green is not more than purple and purple is not more than green. 

    Once each slider has been tweaked, move the saturation back to zero and see how it looks. The idea of pushing the saturation all the way up before you move the temp and tint sliders is that it is much easier to see where the midpoint of each slider is.

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  • Kevin Pinkerton

    Here was my attempt to tweak the white balance using the technique I spoke about. Your image:

    My image:

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  • Rick Sammartino Community moderator

    I think the 2 of you have the color balance as good as it's going to get, so instead I tweaked the photo up a bit just to see what I could get.

     



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