Can Lightroom histograms tell me how a photo was edited?
Asked 10/14/2015
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I’m trying to understand whether a Lightroom histogram can reveal how a photo or photo series was shot or edited. For example, if two images have distinctive histograms, can I infer things like black/white adjustments, tone curve changes, contrast, clarity, or color grading from that alone? I’m aiming for a nostalgic, pretty look and want to know whether the histogram is a useful guide for recreating it, or if it mainly just describes the tonal distribution already present in the image.
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
10y ago
2 Answers
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The first histogram tells you that you mostly have a lot of everything: darks, mids, and highlights. The darks are in the shade to the right side of the photo, the mids are the road and sunny-side stuff on the left, and the highlights are mainly in the street itself. The only standout is that spike of white, which is the nearly blown-out sky.
The second histogram just tells you it's a relatively high-key photo, owing to all that cream building front. It has very little pure white, primarily in that dress, and very little pure black, probably only in the window above the model. Because of the warm tone of the photograph, the yellows extend considerably higher into the highlights than the cool tones, which is where that big yellow patch comes from.
You wouldn't use the histogram to try and replicate this look. Lightroom histograms are about brightness and lighting, not about color.
Photoshop lets you break a histogram down into its individual color components. Doing so in Lab color space can be a useful way of affecting color. A common way to mimic the highly-saturated appearance of Fuji Velvia is to compress the a and b channels, leaving L alone, for example.
Originally by user4141. Source · Licensed CC BY-SA 4.0
user4141
10y ago
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Not reliably. A histogram mainly shows the distribution of tones (and in Lightroom, color channels), not the exact edits used to create the look. Multiple very different combinations of exposure, contrast, tone curve, black/white point, clarity, and color adjustments can produce similar histograms.
From the examples discussed, one histogram suggests a scene containing a broad range of darks, midtones, and highlights, with a spike from a nearly blown highlight. The other suggests a high-key image with lots of bright warm tones, very little pure black, and little pure white except small areas.
What a histogram is good for: checking clipping, seeing whether an image is low-key or high-key, and judging overall tonal balance. What it is not good for: reverse-engineering a specific editing recipe or style.
So if you want that nostalgic look, use the histogram only as a rough sanity check. Build the look by judging the image itself: exposure, contrast, tone curve, black/white points, and color warmth, rather than trying to match the histogram.
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