Adobe Camera Raw 12.3 Histogram

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I'm trying to find out how to change the Camera Raw Histogram from RGB to show the Luminosity graph. Adobe Help can't answer me. Any help very welcome, thanks.

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D FosseCorrect answer

Community Expert

Can't be done AFAIK.

The ACR histogram shows the data as encoded into the output RGB color space you set in the workflow options.

Luminosity is a Photoshop-specific formula that doesn't directly relate to any standard color space. It is similar to Lab L, but not identical. The actual formula is a weighted mix of R, G and B.

TheDigitalDog

Inspiring

The ACR Histogram shows RGB and luminosity as seen below left (and you can see Curves shows just luminosity).

Compare the white part of the Histogram to the final image Histogram in Photoshop set to luminosity:

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Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"

elie_dinur

Participating Frequently

Right-click on the histogram and select "Show Lab Color readouts."

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TheDigitalDog

Inspiring

You may want to check out the Histogram on the Curves panel.

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Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"

D Fosse

Correct answer

Community Expert

Can't be done AFAIK.

The ACR histogram shows the data as encoded into the output RGB color space you set in the workflow options.

Luminosity is a Photoshop-specific formula that doesn't directly relate to any standard color space. It is similar to Lab L, but not identical. The actual formula is a weighted mix of R, G and B.

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