18 Messages
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424 Points
Fri, Dec 22, 2017 12:58 AM
Library Histogram Not Showing Clipped Whites; Develop Histogram Does Show Clipped Whites
I have a photo that has some clipping in the whites. The develop-module histogram shows a short vertical line at the extreme right, properly showing the clipping. Switching to the Library module, the histogram is nearly identical, however it's missing the vertical line showing the clipping! It's quicker to cull photos in the Library, but now I can't trust the histogram, so I can't trust I haven't blown out some whites. The histograms should be identical.
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3 years ago
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andrew_rodney
1.9K Messages
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22.8K Points
3 years ago
Author “Color Management for Photographers"
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scott_rosenthal_7364331
18 Messages
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424 Points
3 years ago
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andrew_rodney
1.9K Messages
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22.8K Points
3 years ago
Author “Color Management for Photographers"
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scott_rosenthal_7364331
18 Messages
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424 Points
3 years ago
To me, it seems as if this issue isn't about raw, JPEG, straight-out-of-camera, etc., it's about something so basic in the histogram as if the pixels are saturated or not. It's almost like the Develop module displays 256 bins (0 to 255) and the Library module displays 255 bins (0 to 254).
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JohanElzenga
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3.3K Messages
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58.1K Points
3 years ago
Johan W. Elzenga,
http://www.johanfoto.com
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scott_rosenthal_7364331
18 Messages
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424 Points
3 years ago
I looked at the raw file in a different program, RawDigger, which reports that there is clipping in all four channels (R,B,G1,G2)
I also, used ACR and changed the color space to all the available ones, and the histogram always showed the clipped whites, which is what one should expect.
My take is that I can't use the Library histogram to cull photos with blown whites, if that is important to me. I'd really like to hear Adobe's take on this.
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andrew_rodney
1.9K Messages
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22.8K Points
3 years ago
Everything you thought you wanted to know about Histograms
Another exhaustive 40 minute video examining:
What are histograms. In Photoshop, ACR, Lightroom.
Histograms: clipping color and tones, color spaces and color gamut.
Histogram and Photoshop’s Level’s command.
Histograms don’t tell us our images are good (examples).
Misconceptions about histograms. How they lie.
Histograms and Expose To The Right (ETTR).
Are histograms useful and if so, how?
Low rez (YouTube): https://www.youtube.com/watch?v=EjPsP4...
High rez: http://digitaldog.net/files/Histogram...
Author “Color Management for Photographers"
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andrew_rodney
1.9K Messages
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22.8K Points
3 years ago
Author “Color Management for Photographers"
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