Lunch atop a (Springfield) skyscraper

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

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2
votes
1answer
129 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)?
2
votes
2answers
337 views

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

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 ...
2
votes
2answers
206 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
votes
2answers
90 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 ...
2
votes
1answer
621 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
votes
2answers
589 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 ...
0
votes
2answers
69 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 ...
0
votes
1answer
110 views

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

What is the color structure histogram and how does it work
1
vote
2answers
980 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 ...
2
votes
3answers
232 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 ...
1
vote
2answers
431 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 ...
0
votes
2answers
132 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 ...
0
votes
0answers
38 views

How do I set unitary white balance? [duplicate]

How do I set unitary white balance on my camera? (5DmkIII) Is there any app that will do this for me? Or do you know about any tethering software (preferably for Mac, if at all) that displays RAW ...
5
votes
2answers
781 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?
1
vote
2answers
675 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.
13
votes
2answers
414 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 ...
5
votes
2answers
761 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
votes
3answers
495 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 ...
13
votes
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 ...
11
votes
4answers
625 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 ...
3
votes
1answer
374 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
votes
4answers
999 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
votes
4answers
1k 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
votes
3answers
790 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 ...
10
votes
2answers
1k 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.
11
votes
4answers
2k 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 ...
22
votes
3answers
8k views

What is Universal White Balance (UniWB)?

How and in what kind of situations should it be used?
101
votes
6answers
5k 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, ...