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Questions tagged [histogram]

In photography the histogram is a visual representation of the distribution of the tones in a photograph.

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1answer
68 views

Strange behaviour in darktable - image inconsistent

I have used darktable previously and this just started the other day. I imported a raw image and when I change anything (exposure, contrast, etc) temporarily the preview I get from darkroom is what ...
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0answers
39 views

Is it possible to hide the histogram in Darktable?

In the darkroom section of darktable, the histogram takes up a huge amount of vertical space. Is there any way to hide or move it?
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2answers
732 views

What do truncated histogram spikes indicate? [duplicate]

I teach a class in fine art printing. During my last class we were looking at an image in Lightroom CC Classic and someone asked why the midtone spike in the image histogram exceeded the top limit. It ...
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1answer
196 views

Nikon D500 bracketing wrong exposure preview and histogram

I have a problem with my Nikon D500 (firmware 1.13) I have set up my bracketing to start with underexposed image. I shoot in manual mode. So I turn live view on and set up exposure for first ...
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2answers
338 views

Why doesn't Darktable's histogram match the one my camera shows?

I'm using Darktable 2.4.2 with Canon 6D. The problem is that when I import a raw image, and apply the Canon 6D base curve, the histogram is totally different with respect to the histogram visualized ...
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2answers
495 views

How to know correct exposure for RAW shooting when camera show JPEG Histogram

I heard that RAW Data is not the rendered data, which means it can’t be influenced by white balance, saturation, and all other settings. I believe that “RAW Data” is influenced by the intensity of ...
4
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4answers
79 views

When would you bracket a scene, if there's no data clipping?

In live view, if my histogram shows no clipping of darks nor highlights of for example a sunset scene, is there any need to bracket the shot? Shooting in RAW of course :)
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2answers
1k views

Why does the histogram of an image depends on the software that opened it?

If I open a raw image in Photoshop and Paintshop pro their histograms and their look is different. However, if I open a Jpeg image in both Software, then their histogram and look is the same. What ...
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2answers
3k views

How do I display a histogram in live view on a Nikon D7500?

I just bought the Nikon D7500. I can't find the histogram. How do I get the histogram on my screen? I would like to view it on the live view?
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1answer
180 views

Why no raw channel histograms? [duplicate]

I understand the basic logic of providing histograms of JPEGs. The sensor pixel values get combined, processed, interpreted as a color, then broken out into new RGB values. So, if you were to give the ...
4
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2answers
308 views

Why are histograms in Entangle and RawTherapee so different?

I've made a photo in Entangle, and then opened it in RawTherapee. When comparing the histograms, I noticed that they are very different. See the screenshot: Here we can see a deep dip in G and B ...
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3answers
1k views

Why don't cameras show an “accurate” histogram?

Why don't cameras show a histogram based on the RAW data rather than on the JPG preview? I know that a RAW file is not a viewable image and can't be displayed without applying curves and defining how ...
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4answers
496 views

How is tonal range of a colored image mapped to a scale of 0-255 in RGB histogram?

RGB histogram (as displayed by Adobe Photoshop) of a colored image maps the available tonal range to a scale of 0-255 (pure black to pure white on horizontal axis). Tonal range, the way I understand, ...
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3answers
651 views

Can I tell which photo has more contrast from their histograms?

for my BA degree I need to find out which one from the following two photos has more contrast: The histogram looks like (left histogram for the left photo, right histogram for the right photo): My ...
2
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1answer
426 views

How Does A 5D Mk3 Generate The Histogram It Displays In Live View?

What is happening under the hood when a 5D Mk3 displays a histogram (luminance or RGB)? What exactly is the data it uses (raw sensor data, jpeg or something else)?
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2answers
554 views

Black clipping paranoia - rational fear or over critical? [closed]

Whilst I edit my photo's in Lightroom/Photoshop I always seem to keep a very stern eye on the clipping point warnings in the histogram. Even when the warning highlighting (the blue mask in Lightroom ...
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2answers
242 views

How do I read these two Lightroom histograms?

What information can I get from these two images about how a series of photos that shares such a histogram were taken/edited? Both photo series are quite pretty and nostalgic, but I don't get the ...
2
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2answers
110 views

How can I see the true, non-adaptive histogram for my photograph? [duplicate]

Given that both Lightroom and (as far as I know) Photoshop use adaptive histograms, is there any way to look at my photos using a true histogram? By true I mean showing a true distribution of ...
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1answer
26k views

Why does my Canon Rebel's LCD viewer show a reduced view with small boxes showing colour saturation on the side?

I have a Canon Rebel camera and recently the following problem has occurred: When it is in autofocus and I take a picture, it shows a photo of what I have taken on the left side in a box and then on ...
6
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2answers
1k views

What Is The Scale Of The Y Axis of The Histogram in Lightroom / ACR?

I understand the concept of histograms. I understand that the x-axis represents the luminosity range from min to max for either all channels or RGB individually, and I understand that the y-axis ...
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2answers
99 views

Lightroom/ACR Histogram Shape

If I open a raw file in ACR or Lightroom and move the exposure slider, why does the shape of the histogram change? If all I'm doing is changing the exposure, I would expect the shape itself to remain ...
2
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2answers
239 views

What is the color structure histogram and how does it work?

What is the color structure histogram and how does it work
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2answers
7k views

How do I tell if an image is exposed correctly when I can't trust the LCD? [duplicate]

I used exposure compensation when I take my shots and adjust it whenever it needs adjustments. Most of the time I shoot using Manual mode. My problem is, when I'm out on a sunny day I can't judge ...
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3answers
1k views

How to interpret a histogram to know whether the photo is under or over exposed? [duplicate]

Yes, the books might have been written on this but not being a technical person, I'd like to understand in short and easy to understand language - How to interpret a histogram to know whether the ...
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2answers
733 views

How do histograms handle highlight and shadow clipping?

My camera shows a histogram in the preview: And after I take the photo: I shoot RAW, but as I understand it, the histogram is computed from JPEG, so it might indicate that the highlights and/or ...
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2answers
161 views

Learning from other photos. Histograms: how do I know if the original photo was over/under exposed? [duplicate]

There is a photographer who shoots mostly indoors with natural light (no soft box) but sometimes he also shows outdoors photos in natural light conditions. His site is at http://www.minimallyminimal....
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2answers
3k views

Is there a way to automatically make the histogram of an image match another image?

Is histogram matching used in real-life photo editing ? Lets say, I have 2 images and I want the first to have histogram of second. And is there any software, that can do this?
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2answers
891 views

What does it mean when an RGB histogram and luminance histogram look similar?

What does it mean when both RGB histogram and luminance histogram look similar? Please explain in detali.
16
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5answers
716 views

How can I use a histogram to expose correctly when the scene is very dark?

If I am photographing a scene with a lot of dark background, how can I use the histogram to tell if the exposure is correct? For instance, at an outdoor concert in which the performers are moderately ...
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2answers
1k views

How to avoid overexposing image using RGB histogram when shooting RAW and using different Picture Controls?

Since the histogram is computed from JPEG that is burned into RAW file using Picture Control (PC), how can one actualy rely on it? How precise is it when PC is set to Neutral? Simple test: Make 2 RAW ...
2
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3answers
738 views

How do I judge correct White Balance?

Which photo has the more correct White Balance? For me the second is much better than the first. My understanding is that the R+G+B histogram needs to be as balanced as possible. Is this true, or does ...
15
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2answers
2k views

How do I interpret individual colors on RGB histogram?

I know how to read the Luminosity histogram and I thought that I knew how to read RGB histogram as well, until I saw the following example: The RGB histogram shows exactly the same 3 'spikes'. What ...
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4answers
782 views

If my histogram shows nothing at the ends of the scale, does it mean the dynamic range of my camera isn't reached?

If my histogram spikes in the middle and evens out pretty much evenly but not completely to the ends (0 & 255), does this just mean that my scene doesn't have the deep shadows or brightest ...
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1answer
518 views

Is it possible to get the Histogram display in Lightroom to only consider the area selected by your cropping?

I've noticed that when I crop a photo, the histogram does not change. If I am then making changes based on the histogram (ie. exposure, fill light, blacks, etc...), it would seem to me that the ...
16
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4answers
1k views

How does histogram shape affect the aesthetics of a picture?

For having more contrast in an image, it's good to have a wide range (i.e. difference between highest and lowest) of light intensities in a picture; and for keeping details, neither highlights nor ...
15
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4answers
2k views

Why should I use the Zone System when the histogram gives me all the information I need?

DSLR cameras, by and large, give very complete information about how the photo is exposed, in the form of a histogram and image of a trial exposure. It shows the light distribution for both luminance ...
4
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3answers
886 views

Since I can't get a light meter reading in the Canon EOS utility on manual, what should I do instead?

I've made a giant copy stand using an artist easel that slides up and down. It's working great, and after help on here I've decided to shoot my artwork archive project on manual (M) setting while ...
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2answers
2k views

Is there an easy way to select by histogram range in GIMP?

The other day I was wondering if there is an easy way in GIMP to choose the pixels that are part of a selected range on the histogram.
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4answers
5k views

What does it mean if the main peak of my Histogram is beyond the top of the chart?

I tried reading this thread about histograms, but couldn't understand it well enough to answer this question. I took some shots yesterday where the main peak of my Histogram was actually off the ...
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3answers
10k views

What is Universal White Balance (UniWB)?

How and in what kind of situations should it be used?
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7answers
7k views

How and why do you use an image histogram?

I realize that an image histogram is a graphical display of an images tonal distribution (i.e. horizontal darks to lights, vertical pixel distribution), but how does one really use it and why? I mean, ...