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What do I see in the histogram?

New Here ,
Dec 26, 2021 Dec 26, 2021

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Hi. I am trying to grasp the consepts of histogram, channels, colors (hue, saturation, brightness, luminance) and so on. Why do the histogram show spikes for both blue and green channel when I have screenshotted a red square with the properties as viewed in the screenshot?

 

1) I would have guessed that it should only show a spike for red.

2) Am I correct that the histogram show the luminance of colors?

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Community Expert ,
Dec 26, 2021 Dec 26, 2021

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I created (a very amateurish) Spark page to explain, in my terms and understanding, "Histograms"

Might be worth a look 🙂

https://spark.adobe.com/page/uJB2ACU1eQzHJ/

 

Regards. My System: Lr-Classic 12.0.1 Photoshop 24.0.1, ACR 15.0, Lightroom 6.0, Lr-iOS 8.0.8, Bridge 13.0, Windows-11.

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